To resolve the synchronization issue between the Da Fit app and Google Fit, follow these steps:

1. Check and Enable Permissions:
- Ensure that the Da Fit app has the necessary permissions to access Google Fit. Go to your phone's Settings > Apps > Da Fit > Permissions and enable all relevant permissions for fitness activity.

2. Verify Bluetooth Connection:
- Ensure Bluetooth is enabled and that your smartwatch is connected to your phone. You can check this in your phone's Settings > Bluetooth.

3. Open Da Fit and Sync Manually:
- Open the Da Fit app. From the homepage, swipe down to prompt a manual sync. This will help in initiating the data transfer.

4. Restart the Device:
- If manual syncing does not work, restart both your smartwatch and the phone. This can refresh connections and resolve temporary glitches.

5. Close Background Applications:
- Make sure the Da Fit app is completely closed and not running in the background. This can be done by accessing the recent apps list and swiping the Da Fit app away.

6. Reinstall Da Fit and Google Fit:
- Uninstall both the Da Fit and Google Fit apps. Reinstall them from the Google Play Store to ensure you have the latest versions and any previous issues are reset.

7. Reset Google Fit Permissions:
- Open Google Fit, then go to Profile > Settings > Manage connected apps, and ensure that Da Fit is listed and granted permission to sync. If necessary, remove and reconnect Da Fit under this section to re-establish the connection.

8. Ensure Sync is Enabled:
- Check that data syncing is enabled for Google Fit. Navigate to Settings > Accounts > Select your Google account > Account sync, and ensure that Google Fit syncing is active.

9. Clear Cache:
- Go to Settings > Apps > Google Fit > Storage, then click on "Clear Cache." This can help remove any corrupted data that may hinder synchronization.

10. Seek Additional Support:
- If none of the above steps work, consider reaching out to support forums specific to Da Fit or Google Fit where other users may have shared solutions to similar issues. For example, explore discussions on syncing issues on platforms such as Reddit or support sites specific to these applications.

If problems persist, there may be deeper issues affecting the connectivity or compatibility between the two apps that could require technical support from the respective developers.

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