I made a Pomodoro app for myself and thought I should share it. It's free, minimalistic, and lightweight.
You can use it here: bit.ly/4fD03No
Or install the Android APK from here (let Play Protect scan it if it asks): bit.ly/4d1R5HJ
Or check it out on GitHub: 
GitHub
GitHub - anuragmmer/pomodoro: A simple pomodoro timer for studying, reading and focusing.
A simple pomodoro timer for studying, reading and focusing. - anuragmmer/pomodoro