If you fall and cannot call for help, your phone will let the people you chose in advance know.

This is an app for Android phones, such as Samsung, Xiaomi or Google phones. Almost every phone that is not an iPhone is an Android phone. There is no iPhone version of the app. The app detects a fall, and it also detects when you get out of the car and do not return to it within 90 minutes, for example when you left the car at the start of a trail and went hiking alone. This detection works whenever you park, so if you are driving to work or running errands, turn on Travel mode in the app, in which the phone does not count 90 minutes from leaving the car, as explained further down. When the phone detects one of these things, it plays a warning sound and gives you time to cancel. If you do not cancel, the app sends an alert to the people you chose in advance, who are called contacts in the app: it sends them a text message, calls them and shows them where your phone is.

How the app works, in six steps The app is suited to hikers, people who work in the field, and older adults

The live map

What do you need to use the app?

To use the app you need an Android phone, version 8 or later, with reception. Reception is the phone's connection to the mobile network, through which it makes calls and sends text messages. Your contacts can also install the app, or get the alerts in Telegram, a messaging app like WhatsApp. For the alerts to reach them in Telegram and in the app, and for them to see on a live map where your phone is, you also need internet. Internet is the connection through which the phone sends and receives data, over its data plan or over a Wi-Fi network. When you turn the app on, it asks for permission to send text messages. Without this permission the phone does not send your contacts text messages, but it still calls them. A smartwatch is an add-on, and you do not have to buy one.

It is a good idea to tell your contacts in advance that you chose them. When you add a contact, you can send them a text message from the app with a link to download the app and a pairing code. The contact types the code into their own app, to connect it to yours. Anyone who gets the alerts in Telegram does not need the code. The download link in the message works for 7 days. A contact who installs the app, or who gets the alerts in Telegram, can also stop the alerts for all contacts, with the "Got it, I'm handling it" button, when they take charge of the situation. A contact who only gets text messages and calls cannot stop the alerts. What a contact needs to do is explained on the page for contacts.

The app is still being tested, and there is no public download link for it yet. The price and the download link will be published when testing is finished. Contacts do not pay, and they get a download link in the text message from the app of the person who chose them. The app is not in the app store: on the phone you install it from a file you download from a link, and the watch app is copied to the watch with a cable.

Do you need a smartwatch?

No, you do not need a smartwatch to use the app. The phone on its own detects a fall, detects that you got out of the car and did not come back to it, sends the alerts to your contacts and shows them on the live map where your phone is.

The live map is a page that opens in any browser. Contacts get a link to it in the alert in Telegram and in their app. During an alert, the location on the map updates every 5 seconds. Even when there is no alert, as long as the app is running on the phone, anyone who got the link sees on the map where your phone is, and the location updates about once every 10 minutes. The link keeps working after the alert too, and anyone who got it can open it whenever they like.

A Garmin smartwatch, model fēnix 8 or fēnix 8 Solar, adds three things:

  1. The watch has an SOS button, which you can press when you need help, even if you have not fallen. The button works only when the watch is connected to the phone. Without a smartwatch, the app has no button that sends an alert, and if you need help and you are conscious, you will have to make the call yourself.
  2. You can press "I'm OK" on the watch and stop the countdown, that is, the time in which the phone warns you and you can still cancel, without taking the phone out of your pocket. That way nothing is sent to your contacts.
  3. If you left the phone somewhere or it was stolen, the watch helps you find it. When the phone and the watch are too far apart, they are no longer connected. After 20 seconds without a connection to the watch, the phone starts updating its location on the live map every 5 seconds. After another 2 to 3 minutes, your contacts get a notice in Telegram and in the app with a link to the live map, so that they can see where the phone is and find it. This notice appears in yellow, not red, because it only informs your contacts, and does not set off an alarm on their phone or make your phone call them. In the contacts' app it shows options to choose from: call you, stop the location updates after they have spoken with you and heard from you that everything is fine, open the live map if you cannot be reached, or tap "Got it", which only tells you that they saw the notice. Tapping "Got it" does not mean that anyone is handling the situation. Even when the connection comes back on its own, the location updates continue, and the notice to your contacts is still sent. To stop the notice from being sent, you have to stop the location updates before 2 minutes have passed from the moment the phone started updating its location every 5 seconds: on the watch, or on the phone, with a secret code you set in advance. This notice is not an alarm, that is, it is not the loud ring that sounds even when the phone is on silent. It plays the normal notification sound on the contact's phone, and your phone does not call your contacts. This notice is sent every time the connection between the watch and the phone is cut and you did not stop the location updates in time, as long as the app is running, even at home, for example when the watch is charging far from the phone.

You can stop the 5-second location updates in three ways: on the watch, after it reconnects to the phone, following the instruction on its screen; on the phone, after typing the secret code you set in the app; or when a contact stops them in their app. If the phone moved more than 300 metres away and your contacts got an alert about it, as explained in the next paragraph, a contact can also stop the updates in Telegram, with the button in the alert. Neither the "I'm OK" button nor the "I'm OK, give me another hour" button, which is on the app's main screen and also cancels an alert that was already sent, stops these updates, so that whoever stole the phone cannot stop them. For the same reason, while the phone is updating its location every 5 seconds, the "Turn off" button in the app also requires the secret code.

The app also has an option that is off until you turn it on. On the app's main screen it is called "Red alert if the phone moves 300 m away after the watch link is lost". When it is on, if the phone moves more than 300 metres from the place where the connection to the watch was cut, your contacts get an alert in Telegram and in their app. In the contacts' app an alarm rings, that is, a loud ring that sounds even when their phone is on silent, and it passes between them in order, as with any alert. The phone itself does not send text messages or make calls then, because it is probably not with you. In this alert, the button that cancels it is "All is fine". When a contact who has spoken with you taps it, in the app or in Telegram, the 5-second location updates stop too. When a contact taps "Got it, I'm handling it", the updates continue, and they can see on the live map where the phone is going.

For now, the watch app works only on these models and sizes: fēnix 8 in 43, 47 or 51 millimetres, and fēnix 8 Solar in 47 or 51 millimetres.

How the app works, in six steps

Step 1. Choose contacts and a profile

In the app you choose up to 10 contacts, for example family members or friends, and set their order. Your contacts can install the same app on their phones. When there is an alert, their phone rings with a loud ring, which this page calls an alarm, even when it is on silent. The order decides whose phone the alarm rings on first, and whom your phone calls first, second and so on. You can also have the phone call a different contact first, rather than the first one on the list. After that contact, the phone continues in the order of the list. You also choose a profile, based on what you do: 'Hiking and outdoors', 'Field work' or 'Older adults'. The profile decides which falls the phone detects, which sound it plays and how much time you have to cancel. Each profile is explained further down the page.

Step 2. The app runs all the time, even when it is not open on the screen

After you turn the app on, there is no need to open it every time you leave home. It keeps running even after the phone is switched off and on again. The phone needs to be on you, in a pocket or a bag. The phone responds to four cases: when you fall, when it does not move at all for 45 seconds (only in the 'Field work' profile), when you got out of the car and did not come back to it within 90 minutes, and when you press the SOS button on the smartwatch, if you have one.

Step 3. You have time to cancel, before anything is sent to your contacts

After a fall, the phone plays a warning sound, vibrates and shows a yellow screen with a countdown. In the 'Hiking and outdoors' and 'Field work' profiles you have 15 seconds to cancel, and in the 'Older adults' profile you have 30 seconds. If nothing happened to you, tap "I'm OK", and nothing is sent. This screen opens even when the phone is locked, and you can tap "I'm OK" without unlocking it.

In the 'Field work' profile, when the phone does not move at all for 45 seconds, it plays two rising tones, like a question, and shows the same yellow screen with a 15-second countdown. The screen has two buttons. If you tap "I'm OK", nothing is sent, and if the phone keeps lying still, the countdown starts again after 45 seconds. If you tap "I'm done, stop checking until I pick up the phone", the phone stops checking whether it is moving until you pick it up again. If you do not tap anything, your contacts get an alert.

When you get out of the car and do not come back to it, 85 minutes after you got out the phone plays a loud warning sound for 15 seconds, in every profile, and shows the yellow screen. Tapping "I'm OK" gives you another hour from the moment you tap. If you missed the warning, you can tap "I'm OK, give me another hour" on the app's main screen, and this button also gives you another hour. You have to tap it before 90 minutes have passed since you got out of the car. If you have not tapped either button by the time 90 minutes have passed, your contacts get an alert. During the extra hour the phone warns you again too, 5 minutes before it ends. So on a hike longer than 90 minutes you have to tap "I'm OK" at every warning, that is, about once an hour. If you do not tap, your contacts will get an alert.

The phone decides that you are driving when it moves at 25 km/h or more in two readings in a row. It decides that you got out of the car when the drive ends and it moves slowly, under 6 km/h, for 4 minutes in a row. The 90 minutes are counted from that moment, that is, about 4 minutes after the car stopped. Any stop of 4 minutes after a drive makes the phone think you got out of the car, even in a long traffic jam and even when you park near home or near work. Every ride counts as a car ride, even on a bus, a train or in a taxi. In a traffic jam, the 90 minutes are cancelled on their own when the car moves again.

The phone decides that you came back to the car when the car moves again, or when you plug the phone in to charge, even into a power bank. Note: if you charge the phone from a power bank in the middle of a hike, the phone will think you came back to the car, and the 90 minutes will be cancelled.

When the phone connects to any Wi-Fi network, for example at home, it asks you whether you are back. It asks once within the 90 minutes, and once within each extra hour. It asks only until the warning sounds, that is, until 5 minutes before the 90 minutes or the extra hour end, and only when you are not driving. When it asks, the screen turns blue, two rising tones sound, and the screen asks "Are you back?". There are two buttons: "I'm back, cancel the countdown" and "Keep counting down". In these buttons, "the countdown" means the 90 minutes from getting out of the car. If you do not answer, the 90 minutes keep running. So if you parked at home and did not answer the question, after 85 minutes a loud warning sound will play, and after 90 minutes your contacts will get an alert. If you only walked to the car and have not driven yet, the phone does not know yet that you came back.

When you drive and are not heading out into nature, for example to work or on errands, you can turn on Travel mode in the app. In this mode the phone does not count 90 minutes from getting out of the car, and your contacts do not get an alert if you do not return to it. Travel mode does not turn off on its own, so before you go on a hike you need to turn it off.

If you tap "I'm OK", on the phone or on the watch, after a fall or after 45 seconds without movement, while you are outside the car, the time until the alert that you did not come back to the car starts over too: from the moment you tap you have one hour, not 90 minutes, even if you had more time left before you tapped.

After you press the SOS button on the smartwatch, you have 5 seconds to cancel the press on the watch itself. After that your contacts get an alert immediately, with no countdown on the phone.

Step 4. Your contacts get an alert

If you do not cancel in time, your phone sends all your contacts a text message, and calls them one after the other. The text message says what happened, and it has a link to the phone's last location in Google Maps, if it is known. The text message has no link to the live map. The call is an ordinary call from your phone, and your phone's speakerphone is on. The system does not play a recorded message during the call: the contact hears what is going on near the phone, and can talk with you if you are near the phone.

At the same time the phone reports to the server. The server is the system's computer: it gets reports from your phone over the internet, and sends the alerts in Telegram and in your contacts' app. If the first contact installed the app on their phone, an alarm rings on their phone in less than 2 minutes. Contacts connected to Telegram immediately get an alert there saying that you may need help, and can already tap "Got it, I'm handling it". In the app, a contact sees the alert only when their turn comes, in the order you set in step 1.

Step 5. More contacts join, until someone takes charge

The alarm rings 3 times for the first contact, with a 3-minute break between rings. If they do not tap "Got it, I'm handling it", the alarm starts ringing for the second contact too, and then for everyone else. The second contact joins after the same time even if the first contact does not have the app, in which case the alarm does not ring for the first contact at all. This order is called the alert chain. The alert chain does not stop on its own. It keeps cycling until someone taps "Got it, I'm handling it" or cancels the alert. The calls from your phone continue separately from the alarm. The phone first calls the contact you chose for the first call, and after that the contacts in the order of the list.

A contact who only gets text messages and calls, without the app and without Telegram, cannot stop the alerts. If none of your contacts has the app or Telegram, your phone will keep calling them until you tap "I'm OK, give me another hour" yourself, until you turn the app off, or until the phone detects that you are driving again, if Travel mode is off. So it is a good idea for at least one of your contacts to have the app or Telegram.

Step 6. A contact takes charge

A contact taps "Got it, I'm handling it". The alerts stop. Contacts connected to Telegram, and anyone who already saw the alert in the app, get a notice saying who took charge and at what time they tapped. This tap means that someone is handling the situation, not that you are OK.

The alert itself, in the app and in Telegram, already shows every contact who gets it the emergency numbers of the country you are in and the best number to call for a rescue: in Israel this is the police, and abroad it is a local rescue service or the situation room of the Israeli Ministry of Foreign Affairs. The alert tells the contact to call you first, and if you cannot be reached, to call the rescue number. The contact who tapped "Got it, I'm handling it" gets your phone's location and the rescue number again. The contacts' app also has a text in English, which can be read out over the phone to a rescue service that does not speak Hebrew. In Telegram this text is sent to whoever tapped, after the tap. In the contact's app these details stay on the screen for 24 hours after the tap, or until a new alert arrives, and in Telegram they stay in the messages.

From this moment the system sends no more alerts about the same incident, and the contact who tapped goes on handling the situation themselves. If the alert was about a fall, about a phone that did not move or about the SOS button, and you got out of the car, the time until the alert that you did not come back to the car keeps running, and when it ends, your contacts get a new alert. If the alert was about not coming back to the car, a new alert of this kind will go out only after you tap "I'm OK" or "I'm OK, give me another hour" and the hour ends, or after you get out of the car again. Your phone stops calling your contacts within 20 seconds, if it has internet. A call that is already ringing is not cut off. After someone has tapped "Got it, I'm handling it", the system no longer lets you cancel the alert. To let people know you are OK, call the person handling it yourself. You will see their name on the app's main screen, if the phone has internet.

If it turns out that you are OK before anyone taps "Got it, I'm handling it", the alert can be cancelled. You tap "I'm OK, give me another hour" in the app, or a contact who has spoken with you taps "All is fine". The alerts stop, and contacts connected to Telegram, and anyone who already saw the alert in the app, get a notice that the alert was cancelled and that you are OK. Anyone who only gets text messages and calls does not get this notice, so it is a good idea to call them and tell them.

Before anyone taps "Got it, I'm handling it", the alert is also cancelled in two more cases. The first case is when your phone detects that you are driving again, if Travel mode is off. The second case is when you turn off the app on the phone with the "Turn off" button. In these cases too the phone stops calling, and your contacts get the same notice saying that you are OK, even though nobody spoke with you. So it is a good idea for a contact who has not heard from you personally to call you. After someone has tapped "Got it, I'm handling it", driving or turning off the app only stops the calls from your phone, and your contacts do not get a notice. Plugging the phone in to charge does not cancel an alert that was already sent. An alert about a phone that moved more than 300 metres from the place where the connection to the watch was cut is cancelled differently: driving and the "I'm OK, give me another hour" button do not cancel it. You cancel it only when you stop the location updates every 5 seconds, on the watch or on the phone with the secret code.

Which profile suits you?

The profile that suits you depends on what you do and on your age: 'Hiking and outdoors' for anyone who hikes, runs or cycles alone outdoors, 'Field work' for anyone who works alone on a work site, and 'Older adults' for older people. The profile decides which falls the phone detects, which sound it plays and how much time you have to cancel before an alert is sent. You choose the profile in the app, and you can switch it at any moment. Each profile has a page on the site that explains it in detail, and you can read all of them before you choose.

Hiking and outdoors

This profile suits anyone who hikes, runs or cycles alone outdoors.

The phone detects only a hard fall, so that ordinary movements during the hike are not mistaken for a fall.

The warning sound is very loud, like a siren, so that people nearby hear it too.

The phone does not detect a fall when its screen is on, for example when you are navigating with a map.

When you cycle at 25 km/h or more, the phone thinks you are driving, and does not detect a fall until it understands that you got out of the car. When you stop for 4 minutes after such a ride, the phone thinks you got out of the car, and starts counting 90 minutes. So if you fall while cycling fast, the phone will not detect the fall. Your contacts will get an alert only if you do not tap "I'm OK" at the warning the phone plays 85 minutes after it thinks you got out of the car, that is, about an hour and a half after the fall. If you have a smartwatch, press the SOS button.

You have 15 seconds to cancel.

Field work

This profile suits anyone who works alone on a work site.

The phone also detects a moderate fall, for example a fall from a ladder, and not only a hard fall.

The phone also notices when it does not move at all for 45 seconds, because that is what happens when someone loses consciousness with the phone in their pocket. After 45 seconds without movement, the phone plays two rising tones and starts a 15-second countdown. It does not do this when its screen is on, when it is charging or when you are driving.

After a fall, the warning sound in this profile is soft, not a siren.

You have 15 seconds to cancel.

Older adults

This profile suits older people who may fall when they lose their balance.

The phone also detects a light or slow fall, because older people sometimes fall slowly, as they lose their balance, and not all at once.

The phone needs to be on you at home too, for example in a pocket. A phone lying on the table will not detect that you fell.

The warning sound is soft, and between the tones a voice asks whether you are OK and asks you to tap the button to cancel. The button the voice means is "I'm OK". The voice is heard only if the phone has a voice installed that can read text aloud in the app's language, Hebrew or English. In the phone's settings this setting is called "Text-to-speech".

When you sit down heavily on a chair, the phone may think you fell. If you hear the sound, tap "I'm OK" within 30 seconds, and nothing is sent.

You have 30 seconds to cancel.

I'm a contact

If someone asked you to be their contact, the page for contacts explains what you will get, what to do when an alarm comes in, how to install the app, and how to get the alerts in Telegram without installing it. Contacts install the same app, and it works only on Android phones. A contact with an iPhone gets the alerts in Telegram, as well as text messages and calls. Anyone who gets the alerts in Telegram and not in the app, on an iPhone or on Android, does not get an alarm that rings when the phone is on silent. If you get a call from the phone of the person who chose you, and you answer and do not hear them speak, it may be an alert.

What happens from the moment the phone detects that you may need help?

From the moment the phone detects that you may need help, it first gives you time to cancel. If you do not cancel, your contacts get an alert, and it continues until one of your contacts takes charge, or until you or one of your contacts cancels it. The diagram shows this in order.

Yellow triangle: warning. Your phone plays a warning sound, and you can still cancel. Nothing has been sent to your contacts yet. The notice to your contacts that the connection between the watch and the phone was cut also appears in yellow.
Red circle: alert. Your contacts get text messages, calls, an alarm in their app, and the alert in Telegram too. In the alert about a phone that moved away from the watch, and in the alert the server sends on its own when the phone stopped reporting to it during a drive, your contacts do not get text messages and calls, only the alert in Telegram and in their app.
Green square: you are OK. The countdown stopped and nothing was sent, or the alert was cancelled.

The diagram starts with one of four cases:

  • After a fall, the phone starts a countdown.
  • In the 'Field work' profile, when the phone does not move at all for 45 seconds, it plays two rising tones and starts a countdown.
  • After you press the SOS button on the smartwatch, you have 5 seconds to cancel on the watch, and then the phone immediately sends your contacts a text message and starts calling them.
  • When you get out of the car and do not return to it, the phone plays a warning sound 85 minutes after you got out. If you have not tapped "I'm OK" or "I'm OK, give me another hour", and have not returned to the car, by the time 90 minutes have passed, the phone immediately sends your contacts a text message and starts calling them.

After a fall, and after 45 seconds without movement, the yellow stage comes right before the alert. If you do not return to the car, the yellow stage is the warning that sounds 85 minutes after you got out, and when 90 minutes pass the alert goes out immediately, with no countdown, and the diagram goes straight to the red stage. After the SOS button is pressed there is no yellow stage on the phone: after the 5 seconds to cancel on the watch, the alert goes out immediately, and the diagram starts at the red stage.

Yellow: your phone plays a warning sound, and you can still cancel

After a fall, or after 45 seconds without movement, the phone plays a warning sound and shows a countdown of 15 seconds, or of 30 seconds in the 'Older adults' profile. If you do not return to the car, the warning sound plays for 15 seconds, in every profile, 85 minutes after you got out. The alert goes out only when 90 minutes have passed, that is, 5 minutes after the warning.

You tapped "I'm OK", and nothing was sent. If you have not returned to the car, the tap gives you another hour.

Red: your phone immediately sends a text message and calls

All your contacts get a text message with your phone's last location, if it is known. The phone first calls the contact you chose for the first call 3 times, and waits a minute between attempts. If you have not chosen a different contact for the first call, this is the first contact on the list. After that it calls the next contact on the list 3 times, and so on. After the last contact on the list, the phone goes back to the first one on the list, and keeps calling until someone stops the alerts.

The phone cannot know for certain whether the contact answered. A call that lasts 20 seconds or more from the moment of dialling counts as an answered call, even if it only rang or went to voicemail. Even an answered call does not stop the calls. The difference between an answered call and an unanswered call affects only the alarm, as explained in the next stage.

Red: at almost the same time, the alarm rings in the first contact's app

In less than 2 minutes, the alarm rings for the first contact for 15 seconds, even when their phone is on silent. All contacts connected to Telegram get an alert there that you may need help.

The alarm rings 3 times for the first contact, with a 3-minute break between rings. If they do not tap "Got it, I'm handling it", the second contact joins, and the alarm rings for both of them 3 more times. If nobody taps then either, everyone else joins, and the alarm rings for all of them 3 more times.

When the call to a contact lasted less than 20 seconds, for example because they rejected it, the alert chain moves on to them: within a minute or two the alarm starts ringing for them, if it is not already ringing for them. If the second contact rejected the call, the alarm rings for them and for the first contact. If the third contact, or anyone after them on the list, rejected the call, the alarm rings for all contacts.

Red: the alert chain goes back to the start

If nobody tapped "Got it, I'm handling it", the alert chain goes back to the first contact and continues. The alarm again rings first for the first contact only, and then the others join again, in the same order. The chain does not stop on its own.

After the alerts have been sent to your contacts, you or your contacts can stop them by tapping a button, in two ways:

  • When a contact taps "Got it, I'm handling it", the alerts stop, and contacts connected to Telegram, and anyone who already saw the alert in the app, get a notice saying who took charge. This tap does not mean that you are OK, so in the diagram it is not marked in green.
  • When a contact who has spoken with you taps "All is fine", or when you tap "I'm OK, give me another hour" in the app, the alerts stop, and contacts connected to Telegram, and anyone who already saw the alert in the app, get a notice that you are OK. The alert can be cancelled this way only until someone taps "Got it, I'm handling it".

Before anyone taps "Got it, I'm handling it", the alert is also cancelled when your phone detects that you are driving again, if Travel mode is off, and when the app is turned off, as explained in step 6. An alert about a phone that moved more than 300 metres from the place where the connection to the watch was cut is not cancelled this way.

More pages on the site

What you need to know before relying on the app

Before relying on the app, it is important to know what it does not do, and when it does not work.

The app does not replace a call to the emergency numbers, and it does not call Magen David Adom (Israel's ambulance service) or the police itself. It calls only the contacts you chose. When you are in immediate danger, call the emergency number first: in Israel 101 for Magen David Adom or 100 for the police, and abroad the emergency number of the country you are in.

Fall detection works only when the phone is on you. If the phone stayed in the car or in a bag far from you, it will not know that you fell. The phone also does not detect a fall when its screen is on, for example when you are navigating with a map, because it assumes that someone using the phone has not fallen. It does not detect a fall while you are driving, from the moment it moves at 25 km/h or more until it understands that you got out of the car. This is true when you are on a bicycle too.

When the battery runs out or the phone is off, the phone detects nothing and sends nothing. The app does not tell your contacts that the battery is about to run out. If the battery runs out at home, or on a walk that did not start with getting out of the car, nobody gets an alert. The server sends an alert on its own in only two cases: when the phone has already reported that you got out of the car, and the time until the alert (the 90 minutes or the extra hour) runs out without you returning, and when the phone stopped reporting to the server for 90 minutes during a drive, for example because it was destroyed or shut down. The second case can also happen when you drive for 90 minutes through an area without internet. In Travel mode the second case does not happen. In both these cases the alert reaches only the contacts connected to Telegram or to the app.

The app needs reception. The alerts in Telegram and in the contacts' app, and the live map, also need internet. Without any reception, the phone cannot send text messages or make calls. Without reception there is usually no internet either, except when the phone is connected to a Wi-Fi network. If there is no reception but the phone is connected to a Wi-Fi network, the alerts in Telegram and in the contacts' app go out, and the live map updates, but the text messages and calls may not go out.

If there is reception but no internet, for example when the data plan has run out, or in an area where the reception is enough for calls but not for browsing, the text messages and calls to your contacts go out. But the phone cannot report to the server, so your contacts do not get the alert in Telegram and in their app, and the live map shows the last location that reached it. Without internet the phone also does not know that a contact tapped "Got it, I'm handling it" or "All is fine". So it keeps calling until you tap "I'm OK, give me another hour", until it detects that you are driving again, if Travel mode is off, until the app is turned off, or until the internet comes back and the phone finds out that a contact has already tapped one of the buttons.

When reception comes back, the phone keeps calling your contacts, one call every minute, until someone stops the alerts. When the internet comes back too, the phone sends the server the alert and everything that was waiting to be sent, in order, and your contacts get the alert in Telegram and in their app. A text message that did not go out while there was no reception will not be sent later either, so the location that was in it will not reach your contacts by text message.

The alert that you did not come back to the car works differently: if the phone has already reported to the server that you got out of the car, the server sends the alert to your contacts in Telegram and in their app when the time until the alert runs out, the 90 minutes or the extra hour, even when your phone has no reception or internet. The phone reports to the server only when it has internet. So if from the moment you got out of the car the phone never had internet, the server does not know that you got out, and will not send the alert. If you tapped "I'm OK" when the phone had no internet, the phone itself will not send text messages or make calls, but the server does not know about the tap, so it will send the alert when the time until the alert runs out. When the internet comes back, the tap will reach the server, the alert will be cancelled, and your contacts will get a notice that you are OK, if by then none of them has tapped "Got it, I'm handling it". The same thing happens if you came back to the car and drove off while the phone had no internet: the phone itself will not send text messages or make calls, but the server does not know that you came back, so it will send the alert when the time until the alert runs out. When the internet comes back, the alert will be cancelled, and your contacts will get a notice that you are OK, if by then none of them has tapped "Got it, I'm handling it".

Before you fly abroad, check that you have a plan that includes calls, text messages and data in the country you are flying to.

Fall detection is not perfect. Even professional fall detection methods do not detect every fall. A study published in 2012 tested 13 such methods on 29 real, not staged, falls, mostly of patients at high risk of falling, who wore a sensor on the lower back. On average the methods detected 57 falls out of 100, and the best method detected 83 falls out of 100. So tell your contacts where you are going, and if you have a smartwatch, use the SOS button when you need help.

Bagalà F. et al., "Evaluation of accelerometer-based fall detection algorithms on real-world falls", PLoS ONE, 2012