Very basic, very good
This is simple, intuitive, and convenient to use (playing in the background is great). The trade off is that it doesnt support all of the aspects of the pomodoro system--planning and listing your tasks, estimating and tracking the number of poms each task will take, and reviewing and evaluating your list. Luckily there is an existing technology (paper and pencil) that you can use for this, so the app can remain "lean and mean."
Ozziefan about
Focus Keep Free : Work & Study Timer, v1.8.4