If your todo list app is not syncing with other apps, try the following troubleshooting steps:

Check Your Internet Connection

Ensure that your device is connected to the internet and that the connection is strong enough to support syncing.

Check Your App Settings

Check your app settings to ensure that syncing is enabled and that the apps you want to sync with are selected.

Restart Your Device

Try restarting your device to see if that resolves the issue.

Contact Support

If the issue persists, contact customer support for further assistance.