The Calm Sleep app can be downloaded for free on your Apple devices (iPhone, iPad) from the App Store by searching for "Calm Sleep."
You can also download the app directly through the following link:
iPhone: https://apps.apple.com/us/app/calm-sleep-rest-relax/id6714481749
Please note: Calm Sleep is only supported on Apple devices running iOS 18+ and above. Android devices are not currently supported.