Privacy Policy — BP Tracker: Blood Pressure Log
Effective date: October 21, 2026
BP Tracker: Blood Pressure Log (also known as BP Journal), published by Billin (Success Link Overseas HK Limited), is an offline blood pressure diary app. This policy explains what happens to the information you record in the app.
Your records stay on your device
All blood pressure readings (systolic and diastolic), pulse values, measurement notes, and tags you enter are stored only in the app's local storage on your own device. The app works completely offline. We do not operate servers that receive your health records, and your records are never uploaded, transmitted to us, sold, or shared with third parties.
No account, no sign-in
The app never asks for your name, email address, or an account, and it does not collect personal information that identifies you.
Exports you control
The app can generate PDF logbooks and CSV spreadsheet exports on your device. These files are created locally and are only shared when you choose to send them yourself (for example, emailing a report to your doctor using your own email app). We never receive a copy of your exports.
Data deletion
Because all records live only on your device, you can delete individual entries inside the app at any time, and uninstalling the app removes all of its locally stored data.
Medical disclaimer
BP Tracker: Blood Pressure Log is a personal logging and organization tool used together with an external blood pressure monitor. The app does not measure blood pressure or heart rate by itself and does not provide medical diagnosis or treatment advice. Always consult a qualified healthcare provider about your blood pressure.
Children
The app is a personal health diary intended for adults managing their own records; it collects no data from anyone, including children.
Changes to this policy
If this policy changes, the updated version will be posted at this page with a new effective date.
Contact
Questions about this policy: admin@wattflow.net
Developer: Billin (Success Link Overseas HK Limited)