QUICK SUMMARY Calm has launched a standalone sleep app that offers personalised sleep plans and sleep audio content. Deftly called Calm Sleep , this new app is focused on sleep optimisation and is packed full of sleep-related content, including personalised sleep plans and sleep audio content. To kick off its launch, the Calm Sleep app is dropping new Sleep Stories featuring actor Andrew Scott. But as a new sleep-focused app, Calm Sleep gets new sleep content first for four weeks before the main app does. The Calm app is free but the Premium option is priced at £49.99 / $69.99 a year, and requires a separate subscription from the main Calm app.