Wouldnt know if this works.

I usually keep my phone on silent because I dont want my alerts waking me up at night and I dont stay on this app because I keep it on the sleep cycle app. This is the ONLY alarm app that I know of that doesnt go off on silent. When my other app goes off to wake me up I look at my phone and on top it just says time to spin with no sound. Ok... Idk. Maybe because people complained that they cant turn it off?.. If thats the case they need to have an option to where you can have it go off on silent if you want to.

GRistine about SpinMe Alarm Clock - Guaranteed Wake Up for Deep Sleepers