You can set a nap alarm. When you go to sleep, a simple button on your smartphone or tablet will wake you up in five, ten, fifteen or twenty minutes.

All you need to do is to click a button and set a nap time for a few minutes. It will wake you up on time, without disturbing other people.

When you're asleep, it can be a helpful tool to fall asleep faster. You don't have to worry about waking up at home or in the middle of the night.