[11] Calm was Apple's "App of the Year" in 2017,[10] and was ranked by Inc. as one of the fastest-growing private companies in America in 2018.

[12] In February 2022, Calm acquired Ripple Health Group, a technology company that connects users with proper healthcare options.

[13] The acquisition focused on building Calm Health,[14][15] which was released in October 2022 and offered through traditional healthcare providers, payers, and self-insured employers.

The series also included original stories and public domain fiction read by narrators.

In 2018, singer Leona Lewis contributed narration to the sleep stories in support of (RED)'s Global Fund to end AIDS.