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
Yup. I had no idea it did that at first, so I was very surprised to find that out lol. It’s a fantastic feature to have though, and makes waking up less of a nightmare
My wife loves it more than I do because I get up about 2 hours before she does!