Sleep WellPrivacy Policy
Effective 12 November 2026
In short
- No account. Your mixes, favourites, timer and reminder settings stay on your phone.
- We do not collect analytics and do not track you across apps.
- The free version shows ads from Google AdMob according to the choice you make in the consent dialog.
- If you buy Premium, Google Play handles the payment; our server only checks that the purchase is valid.
Who we are
Sleep Well is published by Tam Duc Studio (Vietnam), the controller of the data described here. Contact: hamhansamu@proton.me.
What stays on your phone
Your saved mixes, favourites, last played mix, timer choice, breathing settings, language and bedtime reminder schedule are stored on your device only and never sent to us. The bedtime reminder is scheduled by your phone, not by our server. Sounds are played from files on your phone; Google Play may download additional sound packs to your device.
What we collect
| Data | When | Why |
|---|---|---|
| A random installation identifier created by our server (not your advertising ID) | Only if you buy Premium or restore a purchase | To link your purchase to this installation |
| Purchase details from Google Play: product, purchase token, purchase and renewal dates | Only if you buy Premium | To verify the purchase with Google Play and unlock Premium, including after you reinstall |
| Advertising data collected by Google AdMob (such as advertising ID, IP address, device model) | Free version, when an ad is shown | To show ads, personalised only if you agree |
We never receive your card details, contacts, location, microphone audio or anything you say.
Advertising
Ads never appear while a sound is playing, on the player or during a breathing exercise. In the EEA, the UK and Switzerland you are asked for consent before any personalised ads; you can change your choice at any time in Settings → Ad privacy choices. Premium removes ads.
Who receives it
- Google — Google Play (app delivery, sound packs and payments) and AdMob (ads), under Google's own privacy policy: https://policies.google.com/privacy
- Our hosting provider, which runs our server on our behalf and may not use your data for anything else.
We do not sell your personal information.
How long we keep it
| Data | Kept |
|---|---|
| Installation identifier and purchase record | While your purchase is active, then up to 3 years for tax and refund records |
| Data on your phone | Until you delete the app or clear its data |
Your choices and rights
You can ask us for a copy of your data, to correct it or to delete it, and you can withdraw consent to personalised ads at any time. Write to hamhansamu@proton.me; we answer within 30 days.
Deleting your data
On your phone: uninstall Sleep Well or clear its storage in your phone's settings — this deletes your mixes, favourites and settings.
On our server: if you bought Premium, write to hamhansamu@proton.me and ask us to delete your data. We delete your installation identifier and purchase record within 30 days, except records the law requires us to keep (such as proof of purchase). Uninstalling the app does not by itself delete what is on our server. To cancel a subscription, use Google Play → Payments & subscriptions.
If you are in the EEA or the UK
We rely on contract to verify purchases and provide Premium, and on consent for personalised ads. You may complain to your data protection authority.
Children
Sleep Well is not directed at children under 16, and we do not knowingly collect data from them.
Health
Sleep Well is a relaxation app. It is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. If sleep problems continue, please talk to a healthcare professional.
Changes
If we change this policy, we will update the date at the top and, for significant changes, tell you in the app.
Language
This English version is the binding version. Translations are provided for convenience.