FizzFlip uses server-side reward sessions. It does not perform cryptocurrency proof-of-work mining on your phone.
When you start mining, the server creates a session with a start time, end time and server-calculated reward parameters. Closing the app does not turn your phone into a background miner; the session state remains on the server.
After the session reaches its completion state, the app requests collection from the backend. Server validation prevents the client from simply inventing elapsed time or reward totals.
Some account features can change session duration or reward parameters. The current app screen is the source of truth for your account because benefits and promotions can change.
Because FizzFlip is simulated/server-side, it does not require specialized mining hardware and does not use your phone CPU to solve blockchain hashes.