Alarm Klock VS Smart Alarm Pro 2

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

Sleep Time - Alarm Clock - Sleep Time provides insight into your sleep patterns. By tracking your level of movement throughout the night, Sleep Time generates customized sleep data in easy-to-read charts.

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.

Sleep Calculator - Want to wake up in a good shape?

Sleepty - Sleepty is alarm clock based on sleep cycles. It will help you to wake up in your light sleep cycle.

Pokémon Sleep - This sleep app gives you something fun to look forward to when you wake up in the morning.