Watch 4 my Phone - Lost Alert 4+

Left Behind Phone Buddy

Iztok Trost

    • 4.3 • 38 Ratings
    • $2.99


With Watch 4 my Phone, Apple Watch becomes the best Buddy for your Phone!

Never forget or lose your iPhone again and always take care of the iPhone battery with the help of Watch4 myPhone.

Monitor the iPhone location and the battery level on Apple Watch just by raising your wrist.

Receive Lost Alert on Apple Watch that your iPhone is not reachable, when you forget or lose your iPhone, or when your iPhone battery goes flat.

Check the last known location and the distance of your iPhone with the help of Apple Watch.

Get a notification on Apple Watch when your iPhone battery reaches a certain level (Critical, Low, OK or Full). All battery levels can be set to a desired value and switched on/off.

Watch4 myPhone delivers the iPhone battery level and a charging state on Apple Watch 24/7 instantly (without delays), showing it through Complications on Watch Face using meaningful colours and text.
You can also combine iPhone and Watch battery levels on the same Complication.

Watch4 myPhone features on Apple Watch:
- "iPhone LOST" Alert
- CRITICAL ALERT option! iPhone LOST alert can play Critical Alert sound even when Silent Mode is enabled on Apple Watch. Never miss "iPhone LOST !" alert!
- Complication shows LOST ALERT (Not Reachable) info
- iPhone location tracking with adjustable accuracy
- Monitor distance between Apple Watch and iPhone
- "Don't alert when watch is charging" option for iPhone Lost Alert
- Up-to-date iPhone battery level and charging state using Complication
- Option to combine iPhone and Watch battery levels on the same Complication
- Choose which colors will be used for iPhone battery levels and charging state in Complication
- Four adjustable iPhone battery level notifications: Critical, Low, OK, Full
- "Don't alert when watch is charging" option for iPhone Battery Level Alerts
- Different Complication types with meaningful colours and text
- Adjustable number of "iPhone LOST" Alerts
- Start and Stop location updating
- Works in the background
- Debug Mode option to monitor details about reachability checks
- "Disabled Settings Notification" option

Watch4 myPhone features on iPhone:
- iPhone location tracking with adjustable accuracy
- Up-to-date iPhone battery level and charging state
- Manually refresh Apple Watch with iPhone actual status when automatic refresh is paused
- Start and Stop location updating
- Works in the background
- Share a direct link to the app in App Store
- Write a review for the app
- Support option to send pre-filled email to
- What's New (Version History)


Watch4 myPhone is an offline app that doesn't collect or send any personal information or location to any server or third parties.

No in-app purchases! You get a premium version with all features ads-free.

All settings are made through an app on Apple Watch.
Watch app part must be installed and the usage of Complication on Watch Face is recommendable.

Supporting iPhone app works in the background and can even be completely terminated, as long as the location access has been set to Always (first you select While Using the App, later you are asked to allow Always access). 

For any questions or comments please write to:

It's advisable that you don't setup location accuracy setting more accurate than 100 meters (default). If you have WiFi enabled, this will be good enough to position your iPhone to exact location in urban areas.
If you change location accuracy to 1 or 3 kilometres, the app will not even use GPS for location updates, so it will consume less battery, while still doing their job.

What’s New

Version 2.9.1

- The iPhone connection is double-checked before a lost alert is sent
- The warning sign is displayed on the complication instead of iPhone icon when the location on the watch is not updating and as a result Lost alerts will not be sent

Ratings and Reviews

4.3 out of 5
38 Ratings

38 Ratings

Jimcopy ,

It’s a bit complicated

You need to make sure your watch is really connected to your iPhone. Getting that done after rebooting your watch is not a smooth process. I have found that clicking the flat watch button will let you know if it’s tracking your phone. If it does not show up, it’s not connected. It would be very helpful if there was an indicator that would always be on the watch face when connected.

Developer Response ,

Thank you for the rating and the review. I like the idea of an indicator to show if the app is actively checking the connection of the watch with the phone. I will definitely add this in the next version of the app.

Feel free to contact me (Support button) on, if you have any other questions or suggestions about the app.

Debbow1976 ,

Outstanding app!

Both my spouse and I have the app and it works perfectly! It provides excellent notifications, sound, visual and haptic, on your Apple Watch when you move too far away from your iPhone. If you accidentally leave your iPhone at a restaurant, at work or at home, etc., the app provides the notifications before you leave the area. The app also has several nice watch complications that show the battery level of the iPhone. The app will also notify you when your iPhone battery is low! The developer is very responsive and will answer your questions or help you with issues very promptly, as he did for me. I highly recommend that you get this app so that you never accidentally leave your iPhone behind or lose your iPhone again!

Developer Response ,

Thank you very much for your Review and of course for all the help in finding the bug and testing the new features of the app.
Any developer can only want such a user.
Thanks again for using the Watch4 myPhone app.

Romyromyromyromy ,


This watch / iPhone app is just what I been looking for . I am always leaving my iPhone in the restrooms like at work , Walmart or restaurants . Sometimes I am in a store and I put my iPhone down on a shelf to pick up an item to look at , then I walk away, then most of the time I’m already in my car and I reach for my iPhone and it is not there. Thats when I start to frick out , running back in store and trying to remember where I last seen it or left it . This app dings me multiple times alerting me that my iPhone is not with me .
For those of you who are like me and don’t want to loose your phone , I recommend this Watch4myPhone app , it only cost me $1.99 , that’s a lot cheaper then loosing my iPhone and fricking out .

Developer Response ,

To avoid too many false alerts, the default Lost Alert Check Frequency is: Num of tries = 2 and Time between tries (s) = 10. This means, that the app will check if your phone is reachable every 10 seconds and it will send the lost alert after 2 unsuccessful checks. With these settings the app will alert you in 10 to 20 seconds after you leave your phone behind. If you happen to leave your phone behind frequently, you can change the Lost Alert Check Frequency to: Num of tries = 1 and Time between tries (s) = 5 and you will be alerted 5 seconds after you leave your phone behind.

Fell free to contact me (Support button) on, if you have any other questions or suggestions about the app. 

App Privacy

The developer, Iztok Trost, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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