Privacy Policy
In short: Lullo plays relaxing sounds and keeps your mixes, favourites and settings on your phone. We (Frank Apps) have no accounts and no servers that receive your personal data. The free version shows ads from Google AdMob, which uses your device’s advertising ID. Buying Premium is handled by Google Play or the App Store.
1. Who we are
Lullo (“the app”) is developed by Frank Apps (“we”, “us”). If you have a question about this policy or your data, contact us at duytranhoang88@gmail.com.
2. Data that stays on your device
The app’s features work on your phone without an account. None of the following is sent to us:
- Your mixes, favourite sounds and recently played list.
- Settings such as theme, language, default sleep timer, fade-out length, what you use Lullo for and Baby mode preferences.
- Sounds you download. Some sounds are downloaded the first time you play them and kept in the app’s storage.
- Whether you bought Premium. Stored in your phone’s secure storage (Android Keystore or iOS Keychain).
Usage statistics never include your mix names or anything you type.
Lullo does not use your microphone, camera, contacts, photos or precise location, and it does not record or analyse your sleep or your baby.
3. Permissions
- Internet: to download sounds that are not built into the app, and for the Google and Firebase services in section 4. When a sound is downloaded, our file server receives the request like any website does, including your IP address; we do not use it to identify you.
- Notifications (Android 13 and later, optional): to show playback controls and the sleep timer on the lock screen while sounds play.
- Background playback (foreground service, wake lock): to keep sounds playing with the screen off until you or the sleep timer stop them.
4. Third-party services
The app uses the following services. They collect some device data under their own privacy policies.
| Service | Purpose | Data involved |
|---|---|---|
| Google AdMob (Google Mobile Ads SDK) |
Shows ads in the free version | Advertising ID, IP address (which may indicate approximate location), device and app information, ad interactions, diagnostics |
| Google User Messaging Platform | Asks for and stores your ad consent where the law requires it (for example EEA, UK, Switzerland and some US states) | Your consent choices, device information |
| Firebase Crashlytics | Reports app crashes so we can fix them | Crash details (stack trace, app version, device model and OS), Firebase installation ID |
| Google Analytics for Firebase | Counts how features are used (for example which preset mixes are played or how long timers are), only where the law does not ask for your consent first; it stays off in the EEA, UK and Switzerland | App interactions, Firebase installation ID, advertising ID, device and app information, approximate location from the IP address |
| Firebase Remote Config | Lets us adjust settings such as how often full-screen ads may appear, or the list of Premium mixes, without an app update | Firebase installation ID, app version, device and OS information |
| Google Play Billing / Apple App Store | Processes the optional one-time Premium purchase | Purchase details, processed by Google or Apple. We never receive your payment information. The app only stores whether you have Premium. |
Google AdMob may work with third-party ad partners (for example ad networks and bidders) that receive the ad data above to show and measure ads. Where consent is required, the full list of partners is shown in the consent message, and they only process your data as you choose there. Google’s list of commonly used ad partners is at support.google.com/admob/answer/9012903.
On iPhone, the app asks for permission to use the advertising identifier (App Tracking Transparency). If you decline, ads are still shown but are not based on that identifier.
You can read how Google uses data at policies.google.com/technologies/partner-sites and the Google Privacy Policy.
5. Your choices
- Ad consent: where it applies, the consent message appears when you first use the app. You can change your choice anytime under Settings › Privacy choices in the app.
- US state privacy rights: if you live in a US state with a consumer privacy law (such as California, Virginia or Colorado), sharing your data with ad partners for targeted ads may count as “selling” or “sharing” under that law. You can opt out at any time under Settings › Privacy choices (“Do not sell or share my personal information”). You may also contact us to ask about your data; because we keep no copy of it, there is nothing for us to access or delete.
- Personalized ads: you can reset or delete your advertising ID, or opt out of ads personalization, in your phone’s settings (Settings › Google › Ads on Android, Settings › Privacy & Security › Tracking on iPhone).
- No ads: buying Premium turns ads off on every device with the same store account. After that, the ads SDK is not started.
- Delete your data: uninstall the app. This removes your mixes, settings and downloaded sounds. Because we hold no copy of your data, there is nothing to delete on our side.
6. Data sharing and sale
We don’t sell your personal information. The only data shared is what the services in section 4, and the ad partners Google AdMob works with, collect to provide ads, consent and purchases.
7. Children
Lullo is made for adults, including parents and caregivers who play sounds to help a baby sleep. It is not directed at children under 13 (or the minimum age in your country), and we do not knowingly collect personal information from children.
8. Health
Lullo is not a medical device and makes no health claims. Follow safe sleep advice for babies, keep the phone away from the cot and keep the volume low.
9. Changes to this policy
We may update this policy when the app changes. We will post the new version on this page and update the date at the top.
10. Contact
Frank Apps · duytranhoang88@gmail.com