With 'Calm' you can effectively mix more than 100 HQ sounds. Enter into a world with sounds of wild and beautiful nature, fantasy, science fiction, thrill, horror and ambient noise. The app has Night Timer, that useful for better sleep.
Also, you can enjoy the fantastic collection of meditations, affirmations, hypnosis, and mantras. Relax easily!

Subscription pricing and terms: 
Calm Sound mixer offers three auto-renewing subscription options:
$9.99 per month 
$15.99 for 3 months
$25.99 for 1 year

These prices are for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence.

Your Calm Sound mixer subscription will automatically renew at the end of each term and your credit card will be charged through your iTunes account 24-hours prior to the end of the current period. You can turn off auto-renew at any time from your iTunes account settings at least 24-hours before the end of the current period but refunds will not be provided for any unused portion of the term.