Pomotroid

Pomotroid is a free Pomodoro timer by Christopher Murphy for Linux, macOS, and Windows. The app marks time with a clock-like ring, red for the Pomodoro, green for the break. On the Mac, the ring sits in the menu bar, tiny and unobtrusive. And on the Mac Pomotroid has a minor display problem that I hope will be fixed.

I still like Flow, but a ring in the menu bar is a nice alternative to watching time run down by the second.

A related post
The Pomodoro Technique Illustrated