They also sell physical hourglasses if you don't want to be interrupted by a distracting beeping thing once the timer is over, especially if the activity you're trying to start with a pomodoro requires concentration like coding.
I attached an ESP32 and accelerometer to an hourglass for this purpose, calling back to https://pypi.org/project/gitime/ to log pomodoros on my dev machine.
If it was overengineered and trivially redundant, it was relatable and tactile.
