Privacy Policy
kach is built privacy-first. Your training data lives on your device, not our servers. This policy explains the limited data involved, how advertising works, and the choices you have.
We don't require an account and we don't collect your workouts. Two things do leave your device. The app shows ads through Google AdMob, which uses device-level identifiers to serve and measure them. An optional one-time in-app purchase removes ads; once it is active, no advertising SDKs load at all. And the app sends anonymous usage analytics — which screens you open and where you tap — so we can find the parts of the app that confuse people. That capture is masked: your photos, measurements and workout content are never included, and you can switch it off in Profile → Settings → Help improve kach.
1. Who we are
kach ("we", "us", "the app") is a workout-tracking application for iPhone and Apple Watch. For any privacy questions or requests, contact us at support@kach.health.
2. Data stored on your device
The core of kach works entirely on your device. The following never leaves your phone:
- Routines, exercises, logged sets, weights, reps, rest times and notes
- Progress history, personal records, body measurements and progress photos/videos
- App preferences (units, default rest, plate inventory, reminders)
We have no servers that receive or store this information, and none of it is included in the analytics described in section 5.
3. Health & device integrations
If you choose to connect them, kach exchanges data with Apple Health and Apple Watch — for example reading heart rate during workouts, two-way syncing body measurements, and writing completed workouts to Health. This data moves only between your device and Apple Health, is governed by Apple's privacy terms, and never reaches us or advertisers. You can revoke access at any time in your device settings.
4. Advertising
kach is supported by advertising provided by Google AdMob (a Google service). To serve and measure ads, AdMob and its partners may collect and process:
- A device advertising identifier (e.g. Apple's IDFA, subject to your App Tracking Transparency choice)
- Coarse, non-precise information such as device type, OS version, and general region
- Ad interaction events (impressions, taps) used for measurement and fraud prevention
This is third-party advertising: Google acts as an independent controller of the data it collects for ads. We do not share your workout, health or measurement data with advertisers. Google's handling of ad data is described in the Google Privacy & Terms.
In the European Economic Area and the UK, a consent form is shown before any ads, and you can change that choice at any time in the app via Profile → Privacy options. Everywhere, you can reduce ad personalization by disabling "Allow Apps to Request to Track" (or declining the tracking prompt) in iOS Settings. An optional one-time in-app purchase removes ads; once it is active, no advertising SDKs load at all.
5. Analytics & diagnostics
To find the parts of the app that confuse people, kach uses Microsoft Clarity (Microsoft's behavioural-analytics service). It records:
- which screens you open, and in what order
- taps, scrolls and gestures — including repeated taps on something that didn't respond, which is usually how we find a bug
- a small set of app events, such as "a workout was started", "a workout was finished" or "a backup failed"
- a masked, wireframe reconstruction of the screen
Masking happens on the device, before anything is sent. Your progress photos, body measurements, body-fat figures, age, sex, notes and email address are never captured — they are masked out at the source, so Microsoft receives a grey box where they were.
What is captured is the app around them: screen names, button and section labels, routine and exercise names, and your logged sets. That is what lets us see which control someone tapped in vain. We send no name, email or account identifier — there is no account.
Switch it off any time: Profile → Settings → Help improve kach. In the EEA and the UK, declining the consent form in section 4 also turns it off. Microsoft processes this data under its own terms.
Separately, we may use Apple's standard, privacy-preserving crash and performance reporting to keep the app stable. This contains no workout content and is aggregated by Apple. You can opt out via iOS Settings → Privacy & Security → Analytics & Improvements.
6. Website analytics (kach.health)
This marketing website uses Google Analytics 4 to understand aggregate traffic (page views, referrers, approximate region). Analytics cookies are off by default: nothing is set until you choose "Accept" in the cookie banner, and you can decline. Your choice is remembered on your device, and IP addresses are anonymized. This is separate from the in-app analytics described in section 5; the app does not use Google Analytics. Google's handling of this data is described in the Google Privacy Policy.
7. Children
kach is not directed to children under 13 (or the equivalent minimum age in your country). We do not knowingly collect personal data from children.
8. Your rights
Because your training data stays on your device, you remain in control of it: you can view, edit or delete entries at any time from within the app, and uninstalling the app removes all of it. For choices about advertising identifiers see section 4, and for turning off usage analytics see section 5.
9. Changes to this policy
If this policy changes materially, we'll update the date above and, where appropriate, note it in the app. Continued use after an update constitutes acceptance of the revised policy.
10. Contact
Questions, requests, or concerns? Email support@kach.health — we read every message.