Numo Sleep privacy policy
Last updated: 14 November 2026
Numo Sleep is a white noise and sleep sounds app for Android, developed and published by Novixway LLC ("Novixway", "we", "us"). This policy explains what Numo Sleep does with information on your phone.
The short version: Numo Sleep has no accounts, no ads, no analytics and no crash reporting, and it does not use the internet to make sound. Every sound is generated on your phone while it plays. Numo Sleep does not send anything about you or your use of the app to Novixway or to anyone else.
Data kept on your phone
| Data | Why | Leaves the phone? |
|---|---|---|
| The sounds in your current mix, with their volume and tone | to have last night's mix ready when you open the app | No |
| Saved mixes (name, sounds, volume, tone, favorite) | to start a mix again in one tap, and to show favorites on the widget | No |
| Settings: theme, color theme, sleep timer length, fade length, pause on headphone unplug | to keep the app the way you set it | No |
| Wake sound settings: on or off, time, sound and fade length | to start the wake sound at the time you chose | No |
| Whether Pro is unlocked | so Pro features work offline | No (Google Play keeps its own record of your purchase) |
All of this is stored in Numo Sleep's private app storage, which other apps cannot read. Uninstalling Numo Sleep, or clearing its storage in Android Settings, deletes all of it.
Backup files. If you use Export mixes, Numo Sleep writes your saved mixes to a plain text file at the place you pick with the Android file picker. What happens to that file afterwards is up to you. Import mixes reads only the file you pick.
Android backup. If you have turned on Android backup for your device, Android may include Numo Sleep's settings and saved mixes in your device backup, which Google stores under your Google account and backup settings. The Pro flag is excluded and checked again with Google Play.
Permissions
| Permission | Why |
|---|---|
| Run a foreground service for media playback, and keep the device awake | so sound keeps playing with the screen off |
| Show notifications | to show play, pause, timer and stop controls while sound plays, and a wake notification if needed |
| Alarms and reminders (exact alarms) | optional, for the Pro wake sound to start on time; you can allow or deny it in Android Settings |
| Run at startup | to set the Pro wake sound again after the phone restarts |
Numo Sleep does not use the microphone, camera, location, contacts or your files (other than a backup file you pick).
Purchases
Numo Sleep Pro is a one-time in-app purchase handled by Google Play. Payment details are processed by Google, not by Novixway. Numo Sleep asks Google Play only whether Pro was bought on your Google account, and Google's privacy policy applies to that purchase.
Links
The privacy policy and contact links in the app open your browser or mail app. Numo Sleep itself makes no network connection other than through Google Play's billing service for the Pro purchase.
Children
Numo Sleep is not directed to children and collects no personal information from anyone. Parents often play it for babies; the app has no content or features aimed at children.
Changes
If this policy changes, the new version will be posted at https://numosleep.apps.novixway.com/privacy with a new date at the top.
Contact
Novixway LLC, contact@novixway.com