Generator Tracker

Generator Tracker is a simple logbook for anyone who relies on a generator: scheduled blackouts, a cabin, a van, a job site or a rental fleet. Tap Start when the generator runs and Stop when it shuts down, and the app counts engine hours for you. Several generators can run at once, mistakes can be undone and sessions can be added later.

Enter the tank size and the app estimates the fuel and runtime left; refills take a few taps, and litres per hour are calculated from your history. Maintenance tasks (oil, filters, spark plugs) can be set by engine hours, days or both, and overdue service shows right on the home screen. Monthly charts show engine hours and fuel per generator.

Everything is stored on the phone and works fully offline. An account is optional and only syncs records between your own devices. Big high-contrast buttons, a paper-coloured light theme and a true black theme that saves battery during outages. English and Ukrainian.

On iPhone and iPad the app is free, with ads on two screens and up to 3 generators; a one-time purchase removes ads and limits. On Android there is a paid full version and a free Lite edition. The source code is open (MIT).