Onefast
Onefast collects nothing. There is no account, no server run by us, no analytics and no advertising. We never see when you fast or what you weigh. This page explains where your data is stored and how to remove it.
Your fasts (start and end times, the plan, an optional mood) and your weight readings are stored in a database on your iPhone. If iCloud is on, Apple's CloudKit mirrors that database into your private iCloud database — a space tied to your Apple Account that only your devices can read. We have no access to it and no way to get any. Turn it off in iPhone Settings › [your name] › iCloud.
Apple Health is optional and only available with Onefast Pro. If you connect it, Onefast reads and writes one type of data: body mass (your weight). It never reads anything else from Health and never writes fasting data to Health. Readings read from Health are shown in the app and never written to Onefast's database or to iCloud; they stay in Apple Health under Apple's privacy terms. Nothing is sent to us. You can revoke access at any time in iPhone Settings › Health › Data Access & Devices.
The lock screen, Dynamic Island and widgets read the start time of the current fast from a small shared file on your iPhone so they can show the countdown. Nothing leaves the device.
Notifications are scheduled locally on your iPhone. There is no push server.
Your language, units and switches are stored as settings on the device.
Onefast Pro is sold through Apple's App Store as a yearly subscription or a one-time lifetime purchase. Apple tells the app whether the purchase exists; Apple's own privacy policy covers the payment. We receive no personal information about you from a purchase.
Settings › Delete all data removes every fast and weight reading from the iPhone and from your iCloud database. Deleting the app removes everything on the phone. Your iCloud copy can also be removed from iPhone Settings › [your name] › iCloud › Manage Storage. Weight readings written to Apple Health are managed in the Health app.
Onefast is not directed at children under 13 and collects no personal data from anyone.
Who is responsible. Onefast is published by PrimeTruth Team, an individual developer based in Vietnam, reachable at zenDesign219@gmail.com. Because Onefast has no server of ours, your fasts and weight readings never travel to us: we cannot read them, copy them, hand them over or restore them for you.
Health data in particular. Weight is health data, and European law treats it as a special category deserving extra protection. Onefast handles that by never letting it reach us and never letting it leave your own devices: readings live on your iPhone, in your own iCloud account if you switch iCloud on, and in Apple Health if you connect it. We process none of it, so there is nothing about your body for us to disclose, lose or be asked to hand over.
What we actually process. The only personal data that ever reaches us is what you choose to put in an email to us — your address and whatever you write in it. We use it to answer you and keep it only as long as that takes. Our legal basis is our legitimate interest in replying to the people who write to us (Art. 6(1)(f) GDPR).
Your rights. You may ask us for access to the data we hold about you, for it to be corrected or deleted, for its processing to be restricted, for a copy in a portable form, and you may object to that processing. Write to the address above and we will answer within one month. For your own fasting and weight history you do not need us at all, and acting yourself is faster: Settings › Delete all data erases it from the phone and from your iCloud database at once, and Apple Health keeps its own controls.
Complaints. If you think we have handled your data badly, you may lodge a complaint with the data protection authority of the EU or EEA country where you live or work, or with the Information Commissioner's Office in the United Kingdom.
We transfer nothing, because we receive nothing. If you write to us, your email reaches a mailbox we hold in Vietnam. Everything else — the App Store, iCloud, Apple Health — is operated by Apple under Apple's own privacy policy and Apple's own transfer safeguards, not ours.
If this policy changes, the new version is posted here with a new effective date. Questions: zenDesign219@gmail.com.