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PomoFarm: best for Pomodoro sessions with a reward at the end
Platform: Steam · paid
PomoFarm is half focus timer, half idle farming game. You start a timer, do your work, and Tomato the Duck's farm grows while you focus. There are 60 crops, four seasons and 68 skills to unlock, all in cute pixel art. Its Steam page lists "ace that math test" among the things you can do while it runs.
This is the closest thing to a study tool on the list: the farm grows as you run focus sessions, so it rewards the habit rather than distracting from it. It has 97% positive from 462 Steam reviews and runs on Windows and macOS.
Watch out for: It is small, and the farming is light. If you never start the timer, nothing much happens, which is the point.











