In rare instances, you may notice that your device is requiring and draining a substantial amount of battery power while you have OnSong installed, even if OnSong is completely closed. For some reason, sometimes iOS/iPadOS's Settings app has been known to list OnSong as the battery drainage culprit when in reality, it is actually the Mail app fetching new mail in the background. Try going into your device's Settings app > Mail > Accounts > Fetch New Data > Turn OFF Push and set all accounts to Manual. This usually helps with abnormal battery usage and in restoring your device's battery usage to default levels.
Why is OnSong draining my battery?
