Privacy Policy

Last updated: February 18, 2026

This Privacy Policy describes how myaku (脈) (Bundle ID: art.myaku) handles your data. This app is developed and operated by Kosei Sakaguchi.

Data We Collect

• Heart rate data — Measured via camera. All processing is done on-device. When using the pairing feature, heart rate parameters (BPM, HRV, etc.) are sent to our server so your paired partner can view your heartbeat art.
• Purchase information — We use RevenueCat for subscription management. Purchase data is processed in accordance with RevenueCat's Privacy Policy.
• Anonymous ID — A random UUID is generated for pairing features. It is not linked to any personal information.

Data We Do Not Collect

We do not collect location data, contacts, or any other personally identifiable information.

Data Storage

All measurement data is stored locally on your device (SwiftData). Pairing data (heart rate parameters only, no images) may be synced to our server to enable the pairing feature.

Third-Party Services

This app uses RevenueCat for subscription management. Please refer to RevenueCat's Privacy Policy for details on their data handling.

Camera Usage

The camera is used solely for heart rate measurement. No video data is stored or transmitted.

Contact

If you have questions about this policy, please contact us at:

support@myaku.art