Privacy policy

Last updated: October 31, 2026

Overview

Wrist Piano is an Apple Watch app by ZHENGZHOU CREATION INFORMATION TECHNOLOGY CO., LTD. (LuyaoLab). This policy applies to the app, which works offline and does not require an account.

Motion data

With your permission, Core Motion reads acceleration and rotation on the watch to detect taps. Samples are processed in memory for the next note and are not saved, transmitted or used to identify you. The app does not use the microphone, camera, location or HealthKit.

Local settings

Your motion sensitivity and latest 20 performance records are stored locally on your watch. Records contain the melody, date, notes and trigger timing, not microphone audio or raw motion samples. Swipe left in History to delete a take. There is no analytics or advertising SDK, tracking or cloud sync. Deleting the app removes its local data.

Purchases

The app is a one-time paid download handled by Apple. We do not receive your payment card details. There are no in-app purchases or subscriptions. Apple handles purchase records and refunds under its own policies.

Support and this website

If you email support, we receive the email address and information you choose to send, and use them to respond. Do not send sensitive data. This website has no analytics or advertising scripts. Its hosting server may keep ordinary request logs for security and operation; app motion data is never sent to it.

Your choices and contact

You can withdraw Motion & Fitness permission in watch settings and use on-screen keys instead. For questions or deletion of support correspondence, email yqzhouluyao@gmail.com. Updates to this policy will be dated here.