Privacy Policy

This policy explains what happens to data when you use Lull. It is written to be read, not to be survived.

0. Not medical advice — read this first

Lull is a relaxation and wind-down tool. It is not a medical device and it does not diagnose, treat, cure or prevent any condition, including insomnia, sleep apnoea, anxiety or panic disorder. Nothing in the App is medical advice.

• If you have a diagnosed breathing, heart, lung or neurological condition, are pregnant, or take medication that affects breathing or heart rate, speak to your doctor before using paced-breathing exercises.
• Slow, deep breathing can cause light-headedness or dizziness in some people. Stop immediately if you feel faint, dizzy, short of breath, or unwell. Never use the App while driving, cycling, operating machinery, swimming or in any situation where a lapse in attention could hurt you or others.
• Persistent sleep problems deserve a professional opinion. The App is not a substitute for one.
• Lull is for adults. It is not designed for children.

1. The short version

2. Who we are

The app is published by the developer named on the app's store listing ("we", "us"). Contact: kusgrupgames@gmail.com. For privacy questions, write to that address with "Privacy" in the subject.

3. Data stored on your device only

Lull saves the following in local device storage. It never leaves your phone, we cannot read it, and deleting the app deletes it:

• The session length you chose (5, 9 or 15 minutes)
• Your sound and vibration preference
• How many sessions you have completed, and your current streak

4. No advertising, no analytics

Lull contains no advertising SDK, no analytics and no tracking of any kind. There is no Advertising ID permission, no ATT prompt, and no third-party code that could collect anything. This is a product decision: an app whose purpose is to settle you before sleep should not interrupt you, and should not need to know who you are.

5. No purchases

Version 1.0 is entirely free. There are no in-app purchases and no subscription. If that changes in a later version, this policy will be updated before the change ships.

6. What we do not do

• No account, no login, no sign-up
• No analytics SDK of our own, no crash-reporting SDK, no social network SDK
• No microphone, camera, contacts, photos, files or precise GPS access — the app requests none of these permissions
• No leaderboards, accounts or other online services of any kind
• No selling of personal data to anyone, ever

7. Children

Lull is rated for a general audience but it is not directed at children under 13 and we do not knowingly collect personal information from children. Since the app contains no advertising or analytics code, there is no mechanism by which a child could disclose personal information through it.

8. Your rights

Because we hold no personal data about you, there is normally nothing for us to export or erase. You can nevertheless:

• Delete every trace of local data by uninstalling the app
• Contact us to exercise GDPR rights (access, rectification, erasure, objection, portability) or rights under US state privacy laws. We reply within 30 days.

You may also lodge a complaint with your local data protection authority. In Türkiye this is the KVKK (Kişisel Verileri Koruma Kurumu).

9. Data transfers and retention

Ad data is processed by Google on infrastructure that may be located outside your country, under Google's own safeguards and standard contractual clauses. We retain nothing, because we receive nothing.

10. Changes

If this policy changes, the new version appears on this page with a new date. Material changes will also be noted in the app's release notes.