Troubleshooting Polar Unite setup

Having trouble setting up your watch with your mobile?

If you're having trouble setting up your watch with your phone and the Polar Flow mobile app, make sure:

  1. Your phone is compatible with the Polar Flow app.
  2. You have the latest version of the Polar Flow app downloaded from Google Play or the App Store and installed on your phone.
  3. Bluetooth is turned on in your phone and the airplane mode/flight mode is off. You can try to fix a problem in the Bluetooth connection by turning it off and on again in the phone's settings.
  4. Android users: make sure location is enabled for Polar Flow app in the phone's application settings.
  5. Both your watch and phone are powered up.
  6. Then, try setting up your watch again using the instructions in Setting up your watch

If you're still unable to set up, here are a few more steps that can help you solve the problem.

  • The watch has to be set up with your mobile phone using the Polar Flow app, and not in your mobile device’s Bluetooth settings. If you’ve paired the watch with your phone, first unpair the Bluetooth connection with your phone, and then follow the instructions for setting up the watch with the Polar Flow app in Setting up your watch.
  • If you experience unexpected behavior in Flow app during setup, first force quit it to see if this helps. If not, uninstall and reinstall the app. Reset your watch if nothing else works.

Having trouble setting up your watch with your computer?

If you're having trouble setting up your watch with your computer, try the below steps, one at a time, and then try setting up your watch again using the instructions in Setting up your watch

Check that the charging contacts of your watch and charging adapter are clean

If your watch doesn’t charge properly, or if it doesn’t connect to FlowSync, it could be because the charging contacts of your watch and USB charging adapter are not clean enough.

Before charging and connecting to FlowSync, please make sure there’s no moisture, dust or dirt on the charging contacts of your watch and USB charging adapter. Gently wipe off any dirt or moisture. Do not use any sharp tools for cleaning to avoid scratching.

The best way to keep the charging contacts of your watch clean is to wash the watch under running water with a mild soap and water solution after each training session. The watch is water resistant and you can wash it under running water without damaging the electronic components. Do not charge the watch when it's wet or sweaty.

Check that the USB charging adapter works

  • Make sure you have removed the plastic protection shield from the back of your watch.
  • Make sure the USB charging adapter is firmly in place.
  • Remove and reattach the USB charging adapter to your watch.
  • If you plugged your watch into your computer via USB Hub, try plugging it in directly to the computer's own USB port.
  • Try the other USB port(s).

Restart your watch

On your watch, go to General settings > About your watch > Restart your watch. Tap Restart your watch and tap yes icon​ to confirm the restart. Restarting the watch will not delete any of the settings or your personal data from the watch.

You can also restart your watch by pressing and holding the BACK button for 10 seconds.

Restart FlowSync

Close FlowSync by right-clicking/secondary clicking the icon on your computer taskbar/menubar. Choose Close. Then restart FlowSync from your computer desktop icon/Applications folder.

Make sure you have version 3.0 or newer of the Polar FlowSync software installed. Older FlowSync versions are not compatible with Unite. To check the FlowSync version, click the settings icon on FlowSync and select About. If the FlowSync version is older than 3.0, please download and install the latest FlowSync version at

Restart your computer

Keep the charging cable plugged into your watch, and the cable plugged into the computer.

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Make sure your computer recognizes your watch correctly

Windows 10:  

  • Open the Settings menu by going to the Start menu and clicking the settings icon (above the Power button). Open the Devices option and then click on the Connected devices/Bluetooth & other devices option.
  • Plug your watch into the charging cable and the cable into your computer. Your watch should be shown as USB Serial Device under Other devices.


  • Click Apple menu > About This Mac > More Info > System Report > Hardware > USB. Plug your watch into the charging cable and the cable into your computer. Does the list update? Your watch should be shown on the list.
  • If your watch is not shown on the list and/or the synchronization does not start, please reset the device.

If these tips didn’t help, see additional help from Troubleshooting Polar FlowSync, or contact your local customer care with a detailed problem description.

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