Shock smart band yes there is. Here you go
Electric shock band...
I would seriously buy such thing. And I think there is market for it, especially for people who sleep to long and dont feel/hear ringtone/vibration.
It sound weird, but trust me, it would work. Small static "sting" would be WAY better than any vibration, and as far as you are not small crybaby it could be actually really handy, for important appointment and wakeup call.
The same with sitting. I sit in m work for almost whole day and its pain actually, and if there would be vibration with just info "stand up" I would not pay attention to it.
BUT if it would be small electric "sting" that would shock me over and over until I eg. stand up and make 100 steps, then I would actually like it.