Privacy Policy — Fasting Timer

Last updated: 1 October 2026 (v1.3: meals and measurements)

Fasting Timer (package com.bok.fastingtimer) is a timer and log for intermittent fasting. This page explains what the app does with information.

Your data stays on your phone

The start and end time of every fast, your chosen plan, your statistics, any notes you add to a fast, your weekly schedule, the weights, meals and body measurements you log and the cups of water you count are stored only on your device. There is no account, no sign-in and no server that receives any of it. None of these values are included in the analytics described below.

If Android's own backup is turned on for your device, Android may include the app's data in your device backup so it can be restored on a new phone. That backup is handled by Android and your Google account, not by us.

Information the app sends

The app uses Google Analytics for Firebase and Firebase Crashlytics to understand how it is used and to find crashes. What is sent is a short record of which feature was used, never the times of your fasts:

• That a fast was started or ended, the name of the plan (for example "16_8"), whether the start time was set in the past, and whether the goal was reached.
• The length of a finished fast as a range rather than an exact figure (for example "16_18h").
• That a fast was edited or deleted, that the plan was changed, that a note was saved, and that a backup was exported or imported (with the number of items as a range and whether it succeeded).
• That a weight was logged or deleted and which unit (kg or lb) is used — never the weight itself — and that a cup of water was added or removed, with the day's count as a range.
• That a meal or body measurement was logged or deleted and whether calories were entered — never what you ate, the calories, or the measurements themselves.
• Which reminders you turned on or off, whether a reminder could be shown, and whether notification permission was granted.
• If something went wrong, a fixed error code and a shortened error message with any file path removed.

The app does not send:

• The date or time of any fast.
• Your weight, meals, calories or body measurements, or the text of any note.
• The contents of an exported or imported file.
• Your name, email address, contacts or precise location.

Firebase itself adds some technical information to every record: an app instance identifier, your device model, Android version, app version, session timing, and an approximate region worked out from your IP address. Crashlytics adds a crash stack and device details when the app crashes.

Advertising

The app is free, with every plan and every statistic available without payment. It is supported by ads served by Google AdMob: a banner at the bottom of the screen and, occasionally, a full-screen ad. To serve and measure them, AdMob may use your device's advertising ID and an approximate location worked out from your IP address.

A full-screen ad can appear only after you finish a fast and close the summary with Done, and not every time. It never appears when you start a fast, while the timer is running, or when you edit or export your history. If an ad fails to load or is blocked, the timer, notifications and history work exactly the same.

In the European Economic Area and the UK, a consent form is shown before any ad is requested, using Google's User Messaging Platform (UMP). You can reopen it at any time from Ad privacy settings at the bottom of the History tab. Outside those regions the form is not shown and the link is hidden.

Permissions

• Notifications — for the reminders you choose in Settings: goal reached, one hour before the goal, end of the eating window, and a daily reminder to start fasting. On Android 13 and later the app asks the first time you start a fast or turn on a reminder. You can say no; the timer still works.
• Run at startup — after your phone restarts, Android clears scheduled alarms. The app sets your reminders again.

Firebase and the advertising SDK add a small number of background permissions that Android does not prompt you about: internet access, network state, a wake lock, an attribution permission used by analytics, and the advertising ID permission used by AdMob.

Backup: exporting and importing

Export CSV asks Android to let you pick where to save the file, and writes your fasts, notes, weights and water counts there. Import CSV asks you to pick a file and reads only that file. The app has no other access to your storage, and the file never passes through us. What happens to an exported file afterwards is up to you.

Not medical advice

Fasting Timer is a timer and log. It is not a medical device and does not diagnose, treat, cure or prevent any medical condition. Talk to a doctor before fasting if you are pregnant, diabetic, underweight, have a history of eating disorders or take medication.

Children

The app is not directed at children. Beyond the anonymous usage records and the advertising identifier described above, it collects no information from anyone, including children.

Your choices

You can delete any fast from the History tab and any weight from the Tracker tab, or remove all data by clearing the app's storage or uninstalling it. You can reset or delete your advertising ID under Device Settings → Google → Ads, and opt out of personalised ads in your device settings. You can ask for the analytics records associated with your installation to be deleted by emailing the address below.

Changes to this policy

If a future version adds anything further that touches your information, this page will be updated before that version is published, and the date at the top will change.

Contact

Questions about this policy: leeedaebok@gmail.com

개인정보처리방침 (한국어 요약)

Política de privacidad (resumen en español)