Effective date: October 1, 2026

EYSK Jump ("the app") is designed to keep almost everything it measures on your own devices.

What we collect

• Jump-rope activity you generate on the Watch app or, if you use motion-capable AirPods, directly on the iPhone — jump counts, session duration, and timing.
• Health data you authorize, used only to estimate calories burned: biological sex, weight, height, and birth year, read from Apple Health.
• Diagnostic motion recordings, only while a specific in-app diagnostic feature is active, used solely for improving jump-detection accuracy.
• The nickname you choose (edited in Settings > Personal Profile), an approximate country/region resolved once from your location (your exact coordinates are never stored or shared), and your jump/calorie/duration/badge totals are sent to our backend and shown on the app's public World Ranking leaderboard. If you're under 16, your entry is always shown anonymously, regardless of the nickname you've chosen.

How it's used

All of the above is used exclusively to calculate and display your own jump counts, calories, and activity history inside the app. We do not use this data for advertising, and we do not build any profile of you beyond what's shown to you in the app.

Where it's stored

Your activity history is stored locally on your watch and phone, and synced directly between your own paired devices via Apple's WatchConnectivity framework. If you use the Export Data & Auto Sync feature in Settings, a copy is stored in your personal iCloud account, protected by your Apple ID. The World Ranking data listed above (nickname, approximate region, and your totals) is sent to and stored on our backend, provided by Supabase, which is also what lets your history come back automatically if you reinstall the app or set up a new device. That automatic recovery relies on iCloud Keychain being turned on for the same Apple ID — if it's off, or a new device is set up as new under a different Apple ID, that history can't be recovered.

Sharing with third parties

We do not sell, rent, or share your personal health or activity data with any advertiser or analytics service. World Ranking data (see above) is processed by our backend infrastructure provider, Supabase, solely to run the leaderboard — it is never sold or used for advertising.

Health data

Data read from or written to Apple Health is handled according to Apple's HealthKit guidelines. You can revoke the app's access to Health data at any time from the Health app or from Settings on your device.

Deleting your data

From Settings > Reset & Remove, you can choose between two options:

• Reset All My Workout Data (Restart) — permanently deletes your jump-rope history, both on this device and on our backend, while keeping your account and login exactly as they are. Only your totals go back to zero.
• Remove My Account — permanently deletes your account and everything stored on our backend, including your jump-rope history. This cannot be undone.

Either option only affects data stored by this app. Workout data already recorded in Apple Health is governed by Apple's own separate permission system and is not automatically deleted by either option — to remove it, open the Health app, go to Browse > EYSK Jump, and delete all data there yourself.