A total of 2 reviews of this product on Reddit.
25th May 2021
Back when I had trouble waking up, I used to use an alarm clock with a vibrating disk that you put under the mattress or the pillow. Something like this but cheaper.
13th Feb 2022
This alarm is expensive, but it’ll wake the ~~dead~~ deaf:
VibroSaver Extremely Strong Vibration Bed Shaker Smart Wi-Fi Alarm Clock with Multiple Alarm & Vibration Settings, Immediate Remote Vibration & Voice Control; For Heavy Sleepers, Deaf People & Seniors https://www.amazon.com/dp/B0849Y7TTF/ref=cm_sw_r_cp_api_glt_i_MR75BJVE61J0WCTZ82SJ?_encoding=UTF8&psc=1