Kindu - Sex Ideas for Couples
Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Spicer - Mobile app for couples to improve sex.
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.
Couple quest - Simple "board-like" game for couples.
SleepBot - SleepBot is a sleep tracking app available in Google Play and the Apple App Store.