Sleep fm — Privacy Policy

Last updated: 20 August 2026

Sleep fm plays sounds to help you fall asleep. That is all it does. This policy is specific about the little it sends, and about who receives it.

No account, ever

There is no sign-up, no email, no password, no profile. You can use every part of Sleep fm without telling us who you are, and we have no way to identify you by name.

What stays on your device

Sleep fm keeps the following locally, and never uploads it:

• the mixes you save, with their sound levels, timer and fade settings
• the mix that was playing last, so it can be resumed
• your preferences: default timer, fade-out, resume-on-open
• whether you have completed the introduction
• whether you have unlocked the full version

We cannot see any of it. Deleting the app deletes it. All sounds are bundled inside the app, so playback works with no network connection at all.

What we send, and to whom

To understand which parts of Sleep.fm are used and to find out when it breaks, the app sends limited technical and usage data to the providers below, who process it on our instructions.

Datadog — RUM and Logs

Datadog, Inc. — hosted in the European Union (EU1 site).

Data: screens opened and usage journeys; which sounds are played, added and removed; timer and fade choices; the answers given during the introduction (what keeps you awake, which sound families you prefer); saved-mix and purchase events; app performance and technical logs; crash reports; device model, operating system version, app version, language; a random session and device identifier; IP address, from which an approximate region is inferred.

Purpose: measuring usage, improving the app, and detecting and fixing faults.