My Fitbit stopped syncing with my phone. It was working fine last week. The app shows Sync Failed every time I try.
Fitbit syncing issues were the number one wearable tech complaint in 2025. Start by force closing the Fitbit app and reopening it, then try syncing again. If that fails, turn Bluetooth off and on again on your phone (Settings, Bluetooth, toggle off and on). On your Fitbit device, restart it: for most models, go to Settings on the device, then About, then Restart. Next, check that your Fitbit app is updated to the latest version in the App Store or Google Play. Outdated app versions are the most common cause of sync failures. If your phone recently updated its operating system, the Fitbit app may need an update to maintain compatibility. Also check your phone's Bluetooth settings — if your Fitbit shows as Paired in Bluetooth settings, remove it from there and let the Fitbit app manage the connection instead (having it in both the Fitbit app AND phone Bluetooth settings can cause conflicts). As a last resort, remove your Fitbit from the app: open the Fitbit app, tap your profile picture, tap your device, scroll down and tap Remove This Device. Then set it up again as if it were new — your historical data is stored in the cloud and will not be lost.
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