RallyLab

Privacy Policy

Last updated: 28 July 2026

RallyLab is a table-tennis training app for Apple Watch and iPhone. It records your matches — heart rate, motion, and video — so you can review your play and track your recovery. This policy explains what data the app touches, where it is stored, and what it is used for.

The short version: RallyLab has no servers, no accounts, and no analytics. Everything the app records stays on your own devices and in your own private Apple accounts — Apple Health, your private iCloud, and your Photos library. The developer cannot see any of it.

Who this policy covers

This policy applies to the RallyLab iPhone app, its embedded Apple Watch app, and the watch complication. The developer is the sole operator; there is no company back end and no third party involved in operating the app.

What RallyLab uses, and where it is stored

Data	Source	Where it is stored	Used for
Heart rate & workouts	Apple Health (HealthKit), written by the watch during a match	Apple Health, on your device	Drawing your heart-rate charts and computing a recovery signal
Recovery markers (resting heart rate, respiratory rate, wrist temperature, HRV)	Apple Health (HealthKit)	Apple Health, plus a short private history in the app's own on-watch storage (App Group)	Computing an overnight recovery/readiness signal
Swing motion (50 Hz accelerometer & gyroscope)	Apple Watch motion sensors during a match	Your private iCloud (a private CloudKit database only you can read)	Reviewing your swing motion alongside the video
Video	Your iPhone camera, when you record a match	On your iPhone, and a copy added to your Photos library	Reviewing and editing your matches
Review decisions (which clips you kept or trimmed)	Your edits in the app	Your private iCloud (private CloudKit), synced across your own devices	Remembering your edits and keeping your devices in sync

Health data

RallyLab reads heart rate and the recovery-related metrics above from Apple Health. It does not write your heart rate anywhere else. In particular:

RallyLab does not upload your heart rate. It is read live from Apple Health each time a chart or recovery score is drawn, and stays there.
The swing-motion file the watch saves to your private iCloud contains motion only — accelerometer and gyroscope samples. It does not contain your heart rate or any other Health data.
Older versions did store heart rate alongside that motion file in your own private iCloud. Current versions do not, and the app ships a maintenance action that finds and removes any such data left by an earlier version — see Your controls below. That data was always in your private iCloud, never anywhere the developer could read it.
You manage your Health data in Apple's Health app, including revoking RallyLab's read access at any time (Health → Sharing → Apps).

Camera, microphone, and Photos

RallyLab uses the camera and microphone only while you are actively recording a match, and only in the foreground. Recorded clips are kept in the app and a copy is added to your Photos library; anything in Photos is managed by you in the Photos app. RallyLab does not upload your video anywhere.

Motion and review data in private iCloud

Swing motion and your review decisions are stored in your own private iCloud (a private CloudKit database tied to your Apple Account). This is the same iCloud that syncs your other Apple data between your devices — it is not accessible to the developer. iCloud keeps a bounded number of recent motion sessions; older ones are removed automatically.

What RallyLab does not do

No developer servers. There is no RallyLab back end. Nothing you record is sent to the developer or to any third-party service.
No analytics or tracking. RallyLab does not use any analytics SDK, does not track you across apps or websites, and sets no tracking identifiers.
No advertising. There are no ads and no ad networks.
No data collection. Because your data stays in your own Apple Health, your own private iCloud, and your own Photos — none of which the developer can access — RallyLab does not "collect" your data in the sense used by Apple's privacy label.

Recovery is a fitness signal, not medical advice

RallyLab's recovery/readiness score is a fitness signal derived from your own baseline — how today's overnight metrics compare to your recent norm. It is correlational, not diagnostic. It is not a medical device, does not diagnose any condition, and must not be used for medical decisions. Its confidence grows as it sees more of your data, and it is never a substitute for professional judgment. If you feel unwell, see a doctor — regardless of what any score says.

Your controls

Health: view or delete heart-rate and recovery data, or revoke RallyLab's access, in the Health app.
Swing motion in iCloud: export any session's raw motion file, or delete all synced motion for your account, from the app's About your data screen. A maintenance action there also removes any heart-rate data that older app versions may have stored alongside motion in iCloud.
Video: delete a clip in the app's Library to remove the app's copy; manage anything already in Photos from the Photos app.
Review decisions: deleting a clip clears its decisions; a small deletion marker remains in your iCloud so your other devices honor the delete.

The app's About your data screen lists every store, where it lives, and which control manages it.

Children

RallyLab is not directed at children and does not knowingly collect data from children. As above, it does not collect personal data at all.

Changes to this policy

If this policy changes, the "Last updated" date above will change and the current version will be published at this URL. Material changes affecting how your data is handled will be reflected in the app.

Contact

Questions about this policy or your data: kashifnoorani@icloud.com.