Matchering - Open-source audio mastering app that masters music based on any reference track you provide.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
eMastered - eMastered makes a song sound better through online mastering.
Timeless | Meditation - Personal practice meditation timer with guided instruction and multi-day courses.
Audio Mastering - Pro quality, fully functional audio mastering application for iPad.
Calm - Calm.com can help you reduce stress and increase calm.