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
Why does it need to sync with your phone?
What’s the goal of connecting it?
As others have mentioned, I’d look for alarm clocks for deaf people. Many are in the $20 range but don’t do Bluetooth.
probably because the times vary