MusicFlow

Heart Diary: BP & Weight Log Privacy Policy

This page explains the privacy policy for Heart Diary: BP & Weight Log (Japanese title: ハートダイアリー:心不全手帳), an iOS / iPadOS app for keeping a daily record of weight, blood pressure, pulse, and related notes. The health records you enter are never sent to us. Usage of the app itself — such as which screens are opened — is collected in an anonymous form that is not linked to you.

1. Health Data (HealthKit)

What you record in the app (weight, blood pressure, pulse, symptoms, exercise, medication, and memos) is stored only on your device and in your own iCloud private database. It is not sent to our servers, and we cannot view it.

  • We do not use health data read from HealthKit, or written to HealthKit, for advertising or marketing.
  • We do not sell or share health data with third parties.
  • We do not use health data for any purpose other than the app itself without your consent.
  • HealthKit integration is optional. All recording features work without it, and you can revoke access at any time in iOS Settings > Privacy & Security > Health.

2. Deleting Your Records

Your records stay under your control. You can delete them in any of the following ways.

  • Delete individual records inside the app.
  • Delete the app from your device (this removes the records stored on the device).
  • Delete the app's data from your iCloud settings (this removes the records synced to iCloud).
  • Data written to HealthKit can be deleted from the iOS Health app.

3. Information We Collect

The app requires no account and no sign-in. The only information we collect is the following two types, gathered through Firebase Analytics (Google).

  • Usage Data (Product Interaction): which screens are opened and which features are used. The purpose is Analytics — understanding how the app is used so it can be improved.
  • Diagnostics (Crash Data): records produced when the app terminates unexpectedly. The purpose is App Functionality — fixing defects.
  • Neither is linked to your identity.
  • Neither is used for tracking. The app does not request tracking permission through App Tracking Transparency.

4. Information We Do Not Collect

We do not collect the following. The records themselves never leave your device, and what reaches us is only the anonymous usage information described above.

  • The health values themselves (weight, blood pressure, pulse, symptoms, and so on).
  • The dates of your records.
  • The contents of your memos.
  • Name, email address, phone number, or home address.
  • Precise location.

5. Third Parties

Firebase Analytics (Google LLC) is the only third-party service the app uses. The app shows no third-party advertising, performs no behavioral tracking, and does not sell or share personal information.

The in-app purchase (the one-time Pro unlock) is processed through Apple's StoreKit, and we never receive your payment information.

6. Medical Notice

This app is not a medical device. Neither the records nor the printed sheet may be used to make diagnostic or treatment decisions. Always consult a healthcare professional about your condition and your treatment.

7. Children

This app is not designed for children. We do not knowingly collect personal information from children.

8. Contact

Please contact MusicFlow with any questions about this policy.

Contact:

https://www.musicflow.tokyo/contact