FastLite
Contents
This Privacy Policy (the "Policy") describes how the FastLite iOS application (including its home screen widgets and Apple Watch app, collectively the "App") handles information relating to you. The App is developed and published by xuyongfang ("we," "us," or "our").
This Policy applies only to the App itself. It does not apply to any service provided by Apple (including the App Store, iCloud, the Health app, and notification scheduling), nor to any other app installed on your device. Those services are governed by their own privacy policies.
Please read this Policy in full before using the App. If you do not agree with any part of this Policy, please stop using the App and delete it.
The App has no servers, no account system, no sign-up or login, and no cloud sync. We do not operate any backend service and are therefore technically incapable of receiving, storing, or reading your data. Everything you create in the App is written only to your own device.
Specifically, we do not collect any of the following:
To provide its timer, statistics, and reminder features, the App stores the following content locally on your device. This data is never uploaded, and we have no means of accessing it.
| Category | Contents | Purpose |
|---|---|---|
| Fasting records | Start time, end time, target duration, and plan identifier for each fast | Live timer, calendar check-ins, streak and duration statistics |
| Weight records | Weight value (kilograms) and time of entry | Weight trend chart, difference from target weight |
| Water intake records | Amount per drink (milliliters) and time of entry | Daily water intake total, goal completion statistics |
| Plans and goals | Current fasting plan, custom fasting duration, daily first-meal time, weekly fasting target count, starting weight, target weight, daily water intake goal, frequently used cup sizes | Generating personalized timers and progress |
| Onboarding choices | Your selected fasting experience level and fasting goals (such as losing weight or improving digestion) | Recommending an initial plan and adjusting the tone of in-app copy |
| Reminder settings | On/off state of each reminder type, water reminder frequency | Scheduling local notifications |
| Feature state | Whether onboarding has been completed, whether instructions have been viewed, Health sync toggle, Membership unlock status | Maintaining app state |
The App's main program, home screen widgets, and Apple Watch app need to display the same state (for example, how much time remains in the current fast). To make this possible, the data described above is stored in a local container shared among these components (which Apple calls an App Group).
This container remains entirely on your device and is protected by the iOS sandbox. Only the App's own components can access it; no other app, and not we ourselves, can read it. State synchronization between your Apple Watch and iPhone takes place directly over Apple's device-to-device channel (WatchConnectivity) and does not pass through any server.
The App can exchange data with the built-in iOS Health app. This feature depends entirely on your explicit authorization, and reading and writing are not enabled automatically by default. On the system authorization sheet, you can allow or deny each data type individually.
In accordance with Apple's applicable requirements and as our commitment to you, data read from the Health app:
You can turn off any read or write permission at any time under iOS Settings › Privacy & Security › Health › FastLite, or turn off the master switch on the App's "Sync to Health" screen. Once revoked, the App will immediately stop the corresponding reading and writing.
Please note: revoking authorization does not delete historical data that has already been written to the Health app. If you wish to delete it, please do so yourself in the Health app. We have neither the right nor the ability to delete it on your behalf.
All reminders in the App are iOS local notifications, scheduled and triggered locally by your device at the times you set.
You can turn off reminders individually on the App's "Reminders" screen, or revoke all notification permissions for the App in iOS Settings.
The App's Membership features are provided through in-app purchases on the Apple App Store, and every transaction is processed entirely by Apple.
The processing of purchase-related information is governed by Apple's privacy policy and terms.
The App does not integrate any third-party software development kit (SDK), including but not limited to: analytics (such as Firebase, Umeng, or Amplitude), advertising and attribution (such as AppsFlyer or Adjust), crash monitoring (such as Sentry or Bugly), social login, customer support systems, or content push services.
The App does not track your activity across other apps or websites and does not read the advertising identifier (IDFA), and therefore will not present you with an App Tracking Transparency (ATT) authorization request.
The App is a native iOS application. It contains no content pages presented in web views and does not use cookies, web beacons, local storage tracking, or any other web tracking technology.
If you have enabled iCloud Backup for your iPhone in system settings, or you back up locally to a computer, that backup may include the data the App stores on your device.
This backup process is controlled by iOS and by you, and the data is encrypted and held by Apple under Apple's privacy policy. We take no part in this process and cannot access any of your backups. You can manage what is backed up under iOS Settings › Apple Account › iCloud.
The App relies on the security mechanisms provided by iOS to protect your data: app sandbox isolation, system-level file protection, and your device passcode, Face ID, or Touch ID.
A risk you should be aware of: because the data is stored locally and the App does not have its own separate passcode, anyone who can unlock your device can view all of the records in the App. Please safeguard your device and your unlock credentials. In addition, jailbreaking a device compromises the iOS sandbox protections, and we cannot guarantee data security on such devices.
Because we do not hold any of your data, there is no server-side retention period to speak of. Retaining and erasing your data is entirely in your hands:
Deletion cannot be undone. The App keeps no copy in the cloud; once data is deleted, it is permanently lost, and we cannot recover it for you.
The App is not designed for children under the age of 13, and we do not knowingly collect any information from children.
We wish to emphasize that intermittent fasting is generally not appropriate for minors who are still growing and developing. We do not recommend that minors use the App to fast. If you are the parent or guardian of a minor and discover that they are using the App, please help them stop using it and delete the App.
In most jurisdictions (including under China's Personal Information Protection Law, the European Union's General Data Protection Regulation (GDPR), and the California Consumer Privacy Act (CCPA), among others), you have rights over your personal information, including the rights to be informed, to access, to rectify, to erase, to restrict processing, to data portability, and to withdraw consent.
With respect to the App, because we do not collect, receive, or store any of your personal information, there is nothing held by us against which these rights could be exercised. You have direct and complete control over your data: it lives on your device, and you can view, modify, export (via system backup), or permanently delete it at any time.
We do not engage in any form of automated decision-making or user profiling.
The App does not transmit any data, so no data export or cross-border transfer takes place.
The App may contain links to third-party pages (for example, Apple's standard terms of use). When you tap such a link, you leave the App, and the handling of information on that page is governed by the third party's policies. We accept no responsibility for the content, privacy practices, or data processing of any third party. We recommend that you read their policies before use.
Because the App neither holds nor transmits any user data, a data breach on our side is not possible. If your device is lost, stolen, or unlocked by someone else and the records in the App are viewed as a result, that situation is beyond our control and we cannot accept responsibility for it.
When the App's features change in a way that affects how data is handled, we will update this Policy accordingly and revise the "Last Updated" date at the top of this page. For material changes, we will provide a prominent notice within the App.
We recommend that you review this page periodically. Continued use of the App after a change takes effect constitutes your acceptance of the updated Policy.
By downloading, installing, or using the App, you confirm that you have read, understood, and agree to the entirety of this Policy, and you consent to the App handling the relevant data locally on your device in the manner described herein.