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
What’s the issue with just using a real vibrator? Probably easy to find and cheap.
It may be that OP is hard of hearing or entirely deaf and does not need physical relaxation so much as a healthy adult sleep schedule.
Probably not, they’re common knowledge among us.
I need to wake up, without waking up everyone else (wake up around 04:00-05:00)
If you have a room for yourself, you could consider a wake up light, like the ones from Philips.
Get a Bluetooth one and pay someone online to tip you at the time you want to wake up.