Privacy Policy (Android)

This policy applies to the 我的血壓 (My Blood Pressure) Android app, package name com.mkjohnny.bpcare (the "App"). For the iPhone and Apple Watch app, see this page. The App's interface is in Traditional Chinese; English names of settings are given in parentheses.

1. Health data stays on your phone

The blood pressure, heart rate, medications, dose records, appointments, chronic prescription refills, checklists and medication photos you enter are stored only in the App's private storage on your phone (if you turn on Health Connect, blood pressure and heart rate are also stored in Health Connect on your phone; see section 2). The developer does not operate any server and the App has no accounts, so the developer cannot see, obtain or sell your health data. The App turns off Android Auto Backup, so this data is not uploaded to Google cloud backup.

2. Health Connect and data the App does not access

Starting with version 1.1, you can turn on Health Connect yourself in 設定 › 健康資料 (Settings › Health data) or in the first-run setup. It is off by default, and Android's Health Connect permission screen asks you to allow each item:

• Write blood pressure and heart rate: saves the blood pressure and heart rate you record in the App to Health Connect on your phone, so you can see them with other health apps.
• Read blood pressure and heart rate: imports blood pressure that other apps (for example a Bluetooth blood pressure monitor's app) saved to Health Connect, together with heart rate recorded within 3 minutes of each measurement, so you don't have to type it in. Imported records are kept only in the App and are never written back to Health Connect.

Health Connect data is exchanged only between Health Connect and the App on your phone. It is never uploaded to any server and never shared with advertising services or other third parties, and it is used only for the record-keeping features described above. You can revoke these permissions at any time in Health Connect or Android settings; deleting an imported record in the App does not delete the original data in other apps. The App's use of Health Connect data complies with the Health Connect Permissions policy, including the Limited Use requirements.

The App does not access your contacts, text messages, call log or GPS location, and does not request these permissions.

3. Camera and photos

Photos you take of your pills or medication bags are stored only inside the App. 拍血壓計 (Scan BP monitor) uses Gemini Nano on phones that support on-device AI and, starting with version 1.1, Google ML Kit on-device text recognition on other phones (the text recognition model is bundled with the App). Either way the numbers are read on your phone, and the photo is never uploaded to any server or saved to your photo library. In the new test build, photos are temporarily cached and deleted after recognition; interrupted scans can be cleared through Android settings. Manual entry remains available when recognition is unsupported or fails. To maintain and improve the service, Google ML Kit may send device/app information, installation identifiers, performance metrics and feature diagnostics to Google; this never includes your photos or health data. See Google ML Kit data disclosure.

4. Notifications, reminders, home screen widgets and read-aloud

Reminders to measure blood pressure, take medication, attend appointments and pick up refills are local notifications on your phone. The Alarms & reminders permission is used only so that reminders ring on time. This version has no feature that sends messages to family members automatically.

Home screen widgets you add yourself (今天吃藥了嗎? / Did I take my medicine today? and 最近血壓 / Latest blood pressure) show medication names, today's progress and your latest reading on the home screen. They read the App's own records and nothing leaves your phone; remove the widgets if you don't want others to see this information.

念給我聽 (Read aloud, from version 1.1) uses your phone's built-in text-to-speech. The App only uses Chinese voices that are installed on the phone and do not need a network connection, so the text being read never leaves your phone. If no Chinese voice is installed, the App guides you to download one in Google's text-to-speech settings; that download is handled by Google. From version 1.2 you can choose Taiwanese: the Taiwanese voice consists of pre-generated AI speech clips bundled in the App and played on the phone, with no network connection and nothing sent off the device.

5. Advertising (Google AdMob)

The 1.1 test build (version code 4 and later) disables ad loading and display, and does not offer ad-removal purchases. The advertising services below are planned for production. Older test builds retain their original behavior. Availability depends on the version actually offered by Google Play.

The production version is planned to show ads provided by Google AdMob; AdMob may also obtain ads from its mediation partners Unity Ads and Liftoff Monetize (Vungle). When advertising is enabled in production, whether you see personalized ads based on your interests depends on your Android advertising ID setting and your ad consent: if you delete or limit your advertising ID in Android Settings › Privacy › Ads, or if consent is required in your region and you have not given it, only non-personalized ads are shown. In every case the App never provides any health data (blood pressure, heart rate, medications, appointments, photos, Health Connect data, etc.) to advertising services. To serve ads, measure performance and prevent fraud, Google and these mediation partners may collect device and network information such as IP address (which can indicate approximate location), the Android advertising ID and app set ID, device model and OS version, ad interactions and diagnostic data. You can reset or delete your advertising ID in Android Settings › Privacy › Ads. Where required in your region, the App asks for your ad consent, and you can change it later in the App under 設定 › 廣告 › 廣告隱私選項 (Settings › Ads › Ad privacy options). See the Google Privacy Policy and how Google uses information from sites or apps that use its services, as well as the Unity and Liftoff privacy policies linked above. After you purchase 永久移除廣告 (Remove Ads Permanently), the App no longer loads any ads.

6. Purchases

Payment for Remove Ads Permanently is handled by Google Play. The developer does not receive your payment information. The App only checks with Google Play whether you have made the purchase.

7. Content you choose to share

Speech issue reports open your email app with the device model, Android and app versions. You review and send the email yourself. Health records are not attached automatically.

Blood-pressure record PDFs, CSV exports and backup files from 備份與還原 (Backup & Restore) are created only when you tap share or export, and you choose where they are saved or who receives them (for example Google Drive, email, your doctor or family). Backup files contain your health data; please keep them safe.

8. Data retention and deletion

Uninstalling the App, or clearing the App's storage in Android settings, deletes all data in the App. Backup files you exported yourself should be deleted from wherever you stored them. Data Google collects for advertising is kept and deleted under the Google Privacy Policy.

9. Children

The App is intended for adults and is not designed for children.

10. Medical disclaimer

The App is for personal health records and reminders only and is not a medical device. Its blood pressure categories follow the 2022 Taiwan Hypertension Guidelines. It does not replace professional medical diagnosis; please follow your doctor's advice for your personal targets.

11. Changes and contact

Any updates to this policy will be posted on this page with a new date. For privacy questions, email mkjohnny@gmail.com.