We've talked more than once about the pomodoro technique, which is built around intensely focusing on a task for 25 minutes and taking a five minute break. There's a lot of software out there for the job, but most of them live on only one of your devices.
Not Focus Timer, an indie app that's been around in various forms for eleven years. The current version works on every Apple platform: Mac, iPhone, iPad, Watch, and even Vision Pro. Your settings—including the current timer—sync via iCloud...