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The short answer: Your kid’s smartwatch usually fails to sync because of Bluetooth interference, a low battery, or outdated app/firmware. Restart both devices, update the app, and check permissions; that resolves most cases.
First, confirm that the smartwatch is charged. Most kids’ watches need at least 20% battery to maintain a stable Bluetooth connection. If it’s below that, charge it for 30 minutes and try again.
On your phone, ensure Bluetooth is turned on and the app has location permission (Android requires it for Bluetooth scanning). Turn Bluetooth off and on again, then open the app and pull to refresh. If the watch still doesn’t appear, move closer to the watch, ideally within 3 feet, and remove any metal objects or electronic devices that could cause interference.
Also, check if the watch is already paired to another phone. Many kids’ watches only allow one active connection at a time. If another family member has the app open, that can block syncing. Make sure only one phone is actively connected.
If basics don’t work, do a full restart. Turn off the smartwatch (usually by holding the power button for 5 seconds) and turn off your phone. Wait 10 seconds, then power on the phone first, then the watch. Once the watch is fully booted (wait for the home screen), open the app and try to sync.
This clears temporary glitches in both devices. For stubborn cases, also force-stop the app on your phone (Android: Settings > Apps > [App] > Force Stop; iOS: swipe up and remove from app switcher), then reopen it.
Outdated software is a common cause. Check your app store for updates for the companion app (e.g., Fitbit Ace, Garmin Jr., or the specific brand). If an update is available, install it. Even if no update shows, try uninstalling and reinstalling the app. This often fixes corrupted data.
Next, update the watch firmware. Most apps have a firmware update option in settings (look for ‘Device Update’ or ‘About’). Ensure the watch is charged above 50% and stays near the phone during the update, which can take 5 to 10 minutes. Firmware updates often improve sync stability.
On iOS, go to Settings > Privacy > Bluetooth and ensure the app is toggled on. Also check Location Services: set to ‘While Using’ for the app. On Android, go to Settings > Apps > [App] > Permissions and enable Location and Nearby Devices (or Bluetooth).
Without these permissions, the app cannot detect or communicate with the watch. Additionally, if you have battery saver mode on your phone, it may restrict background activity. Disable battery optimization for the app or whitelist it.
If nothing works, you may need to unpair and re-pair the watch. In the app, go to device settings and choose ‘Remove Device’ or ‘Forget’. Then, follow the app’s instructions to add a new device. This will erase local data on the watch, but most data is stored in the app once synced, so you won’t lose history.
If you don’t see an option, consult the user manual. For some models, you may need to reset the watch to factory settings (often by holding the side button for 10 seconds or going to Settings > Reset). After reset, re-pair as if it were new.
If you’ve tried all the above and the watch still won’t sync, there may be a hardware issue. Check if the watch is still under warranty. Contact the manufacturer’s support; they may have specific steps or can replace the unit.
Before giving up, try syncing with a different phone if possible. This helps isolate whether the problem is the watch or your phone. If it syncs with another phone, the issue is with your phone’s Bluetooth or app configuration.
If you’re considering a new watch, you might want to check out our Expert Picks: Top 10 Kids Smartwatches 2026 to see models known for reliable syncing.
Q: Why does my kid’s smartwatch sync only when close to the phone?
A: Bluetooth range is typically 30 feet, but walls and interference reduce it. For reliable syncing, keep the phone within 10 feet. Some watches use Bluetooth Low Energy, which has a shorter effective range.
Q: Can I sync the watch with multiple phones?
A: Most kids’ smartwatches allow only one paired phone at a time. If you switch, you may need to unpair from the first phone. Some apps allow profile switching, but it’s not common.
Q: Why does the app say ‘Sync Failed’ but the watch shows data?
A: That usually means the watch has unsynced data that couldn’t transfer. Clear the app’s cache (Android) or restart the phone. Ensure the watch is not in airplane mode and has sufficient battery.
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