Headspace - Meditation made simple. Brilliant things happen in calm minds.
Calm - Calm.com can help you reduce stress and increase calm.
Insight Timer - Support your meditation practice through a massive community powered app.
SoundAura - A background audio player for studying / working.
A Soft Murmur - Ambient sounds to wash away distraction.
Medito - 100% Free Meditation App that will improve your Mental wellbeing with the help of Guided Meditations, Breathing Exercises, Mindfulness Practices, Relaxing Sounds, and more.