Version 1 · Last updated 9 August 2026
Rung has no account, no server and no analytics. Your training data stays on your device and in your own iCloud, and nobody at Rung can see it.
Rung is published by the developer identified on the app's App Store page. Under the GDPR, the developer is the data controller for the limited processing described below.
For privacy questions, write to the support address listed on the support page, on the App Store page, or in the app's Settings.
Your routines, workout history, XP and badges, stiffness check-ins, rehab progress, and your answers to the two onboarding questions (climbing grade and past injuries).
All of it is written to your device's own storage. Rung operates no server and has no database of users. There is no account to create and no way to sign in, because there is nothing to sign in to.
Stiffness check-ins, injury history and rehab progress are health data — a special category under Article 9 of the GDPR. Rung treats them accordingly: they are stored only on your device and in your own iCloud, they are never transmitted to the developer, and they are never used for advertising, profiling or any purpose beyond showing you your own training.
The lawful basis is your explicit consent, given when you accept the Health Hub disclaimer and when you choose to log a check-in. You can withdraw it at any time by deleting the data in Settings.
Apple Health: with your permission, Rung writes completed workouts and active energy to Apple Health, and reads your heart rate during a session to show it on the watch. Apple Health data is governed by Apple's own privacy protections. Rung never reads anything from Apple Health for advertising, and never shares it with anyone.
If you are signed in to iCloud, Rung keeps your routines and history in step across your devices using Apple's iCloud key-value storage. That storage belongs to your Apple Account, not to Rung — the developer has no access to it and cannot read what is in it.
Turning off iCloud for Rung in your device's iCloud settings stops this sync.
Rung Pro is sold by Apple, not by the developer. Payment happens entirely inside the App Store; Rung never sees your name, card, address or Apple Account.
The app asks StoreKit one question — whether this Apple Account currently holds a Rung purchase — and stores only the yes-or-no answer, which is also shared with your Apple Watch so the watch app knows what to unlock.
Rung contains no analytics SDK, no advertising SDK, no crash reporter and no third-party tracker. It does not use the Advertising Identifier and never asks for tracking permission, because there is nothing it would track.
The only network requests the app makes are to the App Store, and to the research databases you reach by tapping a study link in the Science Library — those open in your browser and are subject to the privacy policy of PubMed, the publisher or DOI resolver you land on.
Training and check-in reminders are scheduled locally by your device. Rung sends no push notifications and operates no notification server, so no reminder ever leaves your phone or watch.
Because your data never leaves your own devices and accounts, you already hold it directly. You can export your complete workout and progress history as CSV and JSON files from Settings, without an account or date limit. You can erase everything with Delete All Data in Settings, which clears local storage and the iCloud copy.
Deleting the app removes the on-device copy. Use Delete All Data first if you also want the iCloud copy gone.
Under the GDPR you also have the rights of access, rectification, erasure, restriction, portability and objection, and the right to lodge a complaint with a supervisory authority — in the Czech Republic, the Office for Personal Data Protection (Úřad pro ochranu osobních údajů).
Rung is a strength-training tool intended for adults and supervised adolescents. It is not directed at children under 13 and collects nothing from them, because it collects nothing from anyone.
If what Rung does with your data ever changes, this text changes in the same app update, and the version shown at the bottom of this screen goes up.
Rung is a training app, not a medical service, and nothing in it is a diagnosis or a treatment plan. That is covered where it matters — in the Health Hub — but it belongs next to any mention of health data too.