There are numerous apps available to help you de-stress, unwind and sleep better. A few include UCLA MARC's guided meditation, Happify's grounding activities and Pzizz's binaural beats for sleep.
UCLA Mindful Awareness Research Center (MARC)
For an introduction to mindfulness meditation that you can practice on your own, download the UCLA Mindful App (iTunes / Google Play), stream, or download the guided meditations below. Recorded by UCLA MARC's Director of Mindfulness Education, Diana Winston.
https://www.uclahealth.org/marc/mindful-meditations
You can also learn more from Diana by listening to her UCLA Ted Talk on Mindfulness:
Happify
The Happify app uses science to raise your happiness quotient. Through evidence-based activities, Happify aims to increase your gratitude, positive self talk, resilience, goal setting and acts of kindness.
https://www.happify.com/
Pzizz
This app utilizes effective psychoacoustic principles through algorithmically remixed sound to create dreamscapes that will help you fall asleep fast, stay asleep, and wake up feeling refreshed. Over time the program will learn what kinds of sounds you like and dislike to give you the best sleep experience possible.
https://pzizz.com/
