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Cuffkeep privacy policy

Last updated November 6, 2026. This policy covers the Android app Cuffkeep: Blood Pressure Log (com.tinyfair.cuffkeep) published by Tinyfair on Google Play.

The short version

Cuffkeep is a log for readings you take with your own blood pressure monitor or glucose meter. Your phone does not measure anything, and Cuffkeep is not a medical device. Your health data stays on your phone: we have no accounts or servers, and we never collect your readings, notes or medicines. Data leaves your phone only for ads, purchases, crash reports and technical usage statistics that contain no health values (Google), and for a small settings file the app downloads from our website, as described below.

Data that stays on your phone

Health readings
Blood pressure, pulse, blood sugar and weight readings, with their time, tags and notes, are saved only in the app on your phone. They are never sent to us, to Google Analytics, to the ad SDK or to anyone else.
Profiles, medicines and reminders
Profile names, the medicines and reminder times you enter, and your settings are saved on your phone.
Backups
A backup file is made only when you ask for it, and you choose where it goes with the Android file picker (for example your own Google Drive). Android cloud backup is turned off for this app, so your readings are not copied to your Google account automatically.
Reports
PDF reports and CSV files are created on your phone and shared only when you choose to share them.
Purchases
Handled by Google Play; we never see your payment details.

Not a medical device

Cuffkeep does not measure blood pressure, pulse or blood sugar, and it does not diagnose, treat or prevent any condition or suggest any medicine or dose. Ranges are shown for information, based on published guidelines (AHA/ACC or ESH). Always talk to your doctor about your readings. In an emergency, call your local emergency number.

Settings file from tinyfair.my.id

When it starts, the app downloads a small settings file from https://tinyfair.my.id/config/cuffkeep.json (the minimum app version and which ad formats may appear). The request sends no personal data and no identifier. Like any web request, our web host sees your IP address in its standard server logs; we do not use it to identify you or link it to anything else.

Ads (Google AdMob)

The free version shows ads from Google AdMob: banner and small native ads on screens such as history, trends and reports, and sometimes a full-screen ad at a natural break (never in your first session, never on the reading entry screen, and never after a reading outside the normal range), plus a video ad only when you choose to watch one for 24 hours of Pro. Ad content is limited to no higher than the PG rating, and dating, social casino and similar ads are blocked. To show and measure ads, Google may collect your device's advertising ID, an approximate location from your IP address, information about ad interactions, and diagnostics. Your readings, notes and medicines are never passed to the ad SDK. In the European Economic Area, the United Kingdom and Switzerland the app asks for your consent first, and you can change it later under Settings, Privacy options. You can reset or delete your advertising ID in your Android settings. See how Google uses information from apps that use its services. Pro removes all ads.

Crash reports (Firebase Crashlytics)

If the app crashes or hits a serious error, it sends a crash report to Firebase Crashlytics, a Google service that helps us find and fix the bug. A report contains the error and where it happened in the code, the app version, the device model, the Android version, and a random installation ID that is not linked to you, your Google account or your advertising ID. It never contains your readings, your notes, your medicines or anything that identifies you. Reports are kept for 90 days. See Firebase privacy and security.

Usage statistics (Google Analytics for Firebase)

To learn which features people use and where the app can be better, the app sends a few technical usage events to Google Analytics for Firebase, such as that the main screen opened, that a reading was saved (only the type, for example "blood pressure", never the values), that a report was created, or that the Pro offer was shown or Pro was bought. Events never contain reading values, ranges or categories, tags, notes, medicine names or anything you type, so no health information is collected. Firebase adds the app version, device model, Android version, country, a random app instance ID and, when ad consent allows it, your advertising ID. We do not use Google signals, we do not send a user ID, and we do not sell this data. In the European Economic Area, the United Kingdom and Switzerland, statistics are only collected if you allow it in the consent form (Settings, Privacy options lets you change this). Data is kept for 14 months. See Firebase privacy and security.

Purchases (Google Play)

Pro is sold through Google Play Billing, as a yearly subscription with a 7 day free trial (you can cancel it anytime in Google Play) or a one-time purchase. We do not see your payment details; Google Play tells the app only whether Pro is active.

Permissions

Notifications, for the measurement, medicine and 7-day home check reminders you set; reminders are scheduled again after the phone restarts. No camera, microphone, location, contacts, sensors or storage permission: backups use the Android file picker. Google's ad and purchase libraries add the advertising ID, network state and billing permissions. Internet is used for ads, purchases, crash reports, usage statistics and the settings file described above, never for your readings.

Children

The app is not directed at children under 13 and we do not knowingly collect information from them.

Your choices and deleting data

Cuffkeep has no account and keeps no data on our side. To delete everything Cuffkeep stores (your readings, profiles, medicines, reminders and settings), use Settings, Delete all data in the app, uninstall the app, or clear its storage in Android settings (Apps, Cuffkeep, Storage). Backup files you saved yourself stay where you put them until you delete them. For ad and statistics data, use Settings, Privacy options in the app or your Android advertising ID settings. Questions: support@tinyfair.my.id.

Changes and contact

If this policy changes, the new version will be posted on this page with a new date. Questions: support@tinyfair.my.id.