Privacy Policy
Luna Flow — Privacy Policy
Last updated: 29 September 2026
RedFleet Studios built Luna Flow as a free, ad-supported app. This page explains what happens to your information when you use it. The short version: everything you log stays on your phone, and we never see it.
1. No account, no servers
Luna Flow has no sign-up, no account and no server. The app contains no analytics SDK, and it never sends what you log anywhere. Its only internet use is for ads (see 1a) and the Library's articles (see 1b).
1a. Advertising
Luna Flow is free and shows ads from Google AdMob (banner, in-list and full-screen ads, and an optional video you can watch for 24 hours without ads). To serve and measure ads, Google may collect device information such as your advertising ID, IP address, approximate location derived from it, and how you interact with ads, under Google's privacy policy.
Nothing you log (periods, symptoms, moods, notes or any other health information) is ever shared with AdMob or used to choose ads. Where the law requires it (for example in the EEA, UK and some US states), you are asked for consent before ads are requested, and you can change it any time in You > App > Ad privacy choices. You can also reset or delete your advertising ID in your phone's settings.
1b. Library articles
The Library downloads new articles from the Luna Flow blog (redfleetlunaflow.blogspot.com, hosted by Google Blogger): a plain request with no account, cookies or identifiers, and nothing about what you read is sent back.
2. What the app stores on your phone
Period dates; daily logs (flow, symptoms, moods, energy, discharge, sleep, water, basal temperature, weight, pill taken, notes); journal entries; and your settings. This is kept in the app's private storage on your device. It is excluded from Android cloud backup and device-to-device transfer, so it does not leave your phone through those routes either.
3. When information leaves your phone (only if you choose)
- Backup file: you choose where to save it (for example your own Google Drive). The file is not encrypted; keep it somewhere private.
- PDF report for your doctor: saved wherever you choose.
- Share dates: sends a short text of upcoming period dates through the app and person you pick.
In each case the app you choose handles the file or message under its own privacy policy.
4. Voice notes
Voice notes are turned into text by your phone's own speech-recognition app (for example Google). Luna Flow does not record audio itself and has no microphone permission. The speech app may process your audio under its own policy. Nothing is saved to Luna Flow until you review the text and tap Save.
5. Reminders and permissions
Reminders are scheduled and shown by Android on your device. Luna Flow asks for:
- Notifications — to show reminders you turn on.
- Run at startup — to re-schedule reminders after your phone restarts.
- Internet — for ads and the Library's blog articles.
- Network state and advertising ID — added by Google's ads SDK, used only for ads.
It does not request location, contacts, camera, microphone, photos or storage permissions.
6. App lock
If you set a PIN, only a salted hash of it is stored on your device. It cannot be recovered.
7. Deleting your data
Use You > Appearance & units > Erase all data, or uninstall the app. Because we hold no copy, there is nothing for us to delete on our side.
8. Children
Luna Flow is not directed at children under 13 and does not knowingly collect information from anyone.
9. Health information
Luna Flow is a personal tracking tool. Predictions and fertile-window estimates are calendar-based estimates. It is not a medical device or a method of contraception.
10. Changes
If this policy changes, the updated version will appear in the app and on this page with a new date.
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