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Why does Suunto app for Android not connect to my Suunto device?

The following troubleshooting steps may help solve the connectivity issue with Suunto 5, Suunto 3 Fitness, Suunto 9, Spartan, Ambit3, Traverse and Traverse Alpha Collection watches and Suunto D5, EON Steel and Core dive computers. Try one step at a time and see if the problem was solved.

As some of the steps will require you to close Suunto app, you can find the same FAQ article on our website.


On your device:


  1. Ensure your watch is close by and is awake by pressing the middle button.

Suunto 5, Suunto 9, Suunto 3 Fitness and Spartan: 

  1. Ensure on your watch that Airplane mode is off (toggle is grey) and Discovery is on (toggle is green) check under Settings > Connectivity.


  2. Ensure Power saving is off (toggle is grey): check under Setting > General > Power saving. This applies for Suunto 9 and Spartans only.

Ambit3, Traverse and Traverse Alpha:

  1. Ensure that MobileApp sync is set to Auto: 
    Ambit3: Open Options menu > Connectivity > Settings > MobileApp sync > Auto.
    Traverse: Open Options menu > Connectivity > MobileApp sync > Auto.
  2. The data sync with Suunto app needs to be started from through Suunto app. The sync is started automatically when your watch is paired. In case it does not start automatically tap Sync now. The sync will not start when trying to activate it through your watch.


EON Steel and Core:

  1. Ensure on your dive computer that Airplane mode is off under General > Connectivity > Airplane mode.


Suunto D5:

  1. Ensure on your dive computer that Airplane mode is off: open the Options menu > General > Connectivity > Airplane mode.

On your phone:

  1. Reset the Bluetooth connection: turn off your phone’s Bluetooth (either from your phone’s Bluetooth settings or in the quick settings menu), wait for a few seconds and turn it on again.
  2. If you have Suunto Movescount App installed on your phone, un-install the app as follows. Unfortunately, we cannot recommend having both Suunto app and Movescount app installed on the same phone as it will cause problems with your watch, and app connectivity.

    a) On your device:
    - Spartan, Suunto 9, Suunto 5, Suunto 3 Fitness: Open Settings > Connectivity > Paired devices > Mobile App and choose Forget.
    - Traverse: Open Options menu > Connectivity > Pair > Mobile App. Select Unpair.
    - Ambit3: Open Options menu > Pair > MobileApp. Select Unpair.
    - EON Steel and Core: Enter the menu and open General > Connectivity > Forget mobile.

    b) On your phone:
    - In your mobile device settings, go to Bluetooth and remove your watch from the list of paired devices by tapping the info-icon and then Forget this device.
    - Un-install Movescount App from your phone.
    - Restart your phone.
    - Pair your watch with Suunto app.

    Learn more about how to use the Suunto app and Suunto Movescount together.

  3. Close Suunto app completely and restart the app. Open your phone’s Settings menu, go to applications or apps, open Suunto app and Force stop the app.

  4. Restart your phone.
  5. Ensure you have the latest app version installed. Go to Google Play Store and check for available app updates.
  6. Ensure your Suunto device uses the latest software. Connect your watch to SuuntoLink, Moveslink2 or DM5 on your computer and check for available updates. Learn more about software updates for your product and how to install the software on your watch with SuuntoLink  or Moveslink2 or dive computer with DM5.

Note: If you tried to synchronize an exercise log with Suunto app, but the sync failed, please send us diagnostic logs from your device. Diagnostic logs help us investigate the issue and provide future improvements. 

To send diagnostic logs:

  1. Open the watch view and tap the menu icon (three dots).
  2. Select Send logs to Suunto. This may take several minutes.


In case the mentioned tips did not resolve the issue, reset the connection between your device and the app: 

  1. Open Suunto app and tap the “watch” icon in the top corner to open the Watch view.
    Watch icon in Suunto app.
  2. Open the settings menu in the upper right corner and open Manage connection.

    Manage connection in settings menu.

  3. Tap Forget.

    Forget watch from Suunto app.

  4. Open the Bluetooth settings in your phone’s settings menu.  Your watch will be listed under Available devices. Tap on the cog icon and select Unpair
  5. Turn off your phone’s Bluetooth.

  6. Restart your phone.
  7. Unpair Suunto app from your device: 

    - Spartan, Suunto 5, Suunto 3 Fitness and Suunto 9: Open Settings > Connectivity > Paired devices. If Mobile App is listed, select Forget

    - Traverse: Open the Options menu > Connectivity > Pair > Mobile App. Select Unpair

    - Ambit3: Open the Options menu > Pair > MobileApp. Select Unpair

    - EON Steel and Core: Enter the menu and open General > Connectivity > Forget mobile.
    Suunto D5: Open the Options menu > General > Connectivity and select Forget mobile

  8. Restart pairing on your phone as if you would pair it for the first time.


If you have tried all mentioned tips and troubleshooting steps, but the issue persists, please contact our Suunto Support. We are happy to assist you.