Haven’t happen to me since I have to use a NFC capcha to turn of the alarm. The NFC tag is positioned at the light switch in the bathroom and my phone is connected to my bluetooth speaker on max sound level and the alarmsound is the climax of Carl Orff - O Fortuna. Doing this for a few years now and it is literally impossible for me to oversleep.

Three years. The price changed from 49,99€ to 69.99€ per year. At least in Germany.