The app scans a QR code to connect to a nearby charger. Once it's connected, you can use the app to check the status of the charge, see how much power is left in the battery, and check the battery level. You can also disconnect the charger and the app will remember the reason for that, so you don't need to remember it again.

The app is a tool to help you keep your phone charged up. It's not a full-fledged power bank. It can only provide basic information about the state of the charge and is intended to be used as a quick and easy way to keep your phone charged up. It's not meant for serious power bank users.