I always used to wish my digital watches had a Pomodoro timer function. I even considered writing to Timex at one point to request this, but I’m a lazy bag of social anxiety, so that didn’t happen.
My new Casio watch has an awesome, unadvertised Pomodoro function that lets you stack and repeat multiple timers. I bought this only because the metal band of my old watch gave me massive patches of red itchy bumps, and apparently I would rather exacerbate them than go without a watch for a few days. This one was $20 and solar-powered, and I was surprised to stumble on a feature I’d wanted in a watch for so long.