All the vibrating alarm clocks I could find do not sync with your phone, and have to be set manually. I thought about getting an Arduino, but then I will have to build the whole thing by myself. The only logical conclusion I could come up with is to get a programable vibrator. But most of them are either very expensive of look too much like a vibrator (sus).
This is the closest I got: https://www.amazon.com/dp/B09NNFPHXG https://www.amazon.com/dp/B0CD7FPFQ5?th=1
If only the battery lasted more than a day, day and a half tops…
I’ve had numerous watches, just because I need an alarm on me for medications (ranging from cheap $30 models, through Fitbit/athletic watches, up to the Apple watch), and they basically all have the vibration feature. The Apple Watch has probably the worst battery life of any of them I’ve tried, and I’ve tried really hard to extend it…
Some of the really dirt cheap ones you pair with the watch, set the alarms, then unpair (because they are cheap Chinese brands with all sorts of tracking if you use the app), and the battery on the watch is good for like a week. If you want to keep the shitty app running, or have a spare device to pair it with, you can change alarms on the fly.
Either way, I wouldn’t recommend an Apple Watch to someone who just wants a vibrating alarm. They are not good for that single use, unless you actually want all the other stuff it does and are fine with the crap battery life. Same with any major smart watch. If all you need is an alarm, they are super overkill and just one more thing to keep charged.