Crystal Alarm - Mobile phone alarm A personal alert strengthens your safety in risky situations, threatening situations and for lone workers.

Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.

Kitestring - Keep tabs on your well-being.

Sleep as Android - Common alarm clocks ignore your sleep cycles, they wake you on schedule no matter your are currently in your deep sleep. Waking up from deep sleep is unpleasant, it makes you tired and it may negatively affect your productivity during the whole day.

OnGuardHelp - Travel & Location

Talalarmo - Minimalistic android alarm