Privacy policy

mybackhurts is an app for Mac, iPhone and iPad, Windows and Android by Vlad Mihalachi. This policy explains what the app and this website do with your information.

The Mac app comes from the Mac App Store, the iPhone and iPad app from the App Store, the Windows app from the Microsoft Store, and the Android app from Google Play.

What the app processes

When you choose Webcam mode, the app uses your camera to detect body poses and count exercise repetitions. On Mac, iPhone and iPad, it uses Apple’s Vision framework. On Windows, it uses a pose model that runs on your PC through Windows ML. On Android, it uses a pose model that is part of the app and runs on your device with ONNX Runtime, reading the camera through Android’s CameraX. On every platform, video frames and pose data are processed in memory on your device and immediately discarded. The app does not record, upload, or store images or video. Webcam mode is optional; in Simple mode, the camera stays off unless you ask for it.

On Mac and Windows, so that reminders don’t interrupt you, the app checks how long it has been since you last used the keyboard or mouse, whether another app is using the camera or microphone (for example, during a call), and whether a full-screen app is open. It only reads this status from the operating system. It never turns on the camera or microphone, and it does not keep this information. On Android, during a Webcam mode break, the app reads from the phone’s audio mode whether a call is in progress, and pauses the break while it is; it does not keep this either. The iPhone and iPad app makes none of these checks.

What the app stores

The app stores settings and exercise results such as exercise names, repetitions, durations, and dates locally on your device. It does not require an account and does not collect your name, email address, location, contacts, or browsing activity. Each device keeps its own history: the app does not sync it between your devices.

Sharing and network access

mybackhurts does not operate analytics, advertising, tracking, or backend services, and does not make network requests of its own. If you make a Supporter purchase or tip, the store you got the app from processes that transaction: Apple through StoreKit on Mac, iPhone and iPad, under Apple’s terms and privacy policy; Microsoft through the Microsoft Store on Windows, under Microsoft’s terms and privacy statement; and Google through Google Play Billing on Android, under Google’s terms and privacy policy. The Windows version is also installed and updated through the Microsoft Store.

After you have used the app for a while, it may ask you once to rate it, through the store’s own rating prompt: Apple’s on Mac, iPhone and iPad, the Microsoft Store’s on Windows, and Google Play’s in-app review on Android. The store decides whether to show it. A rating or review you leave goes to that store, under its terms; the app does not record whether you left one.

Retention and deletion

Your local settings and session history remain on your device until you delete them using the app’s controls, remove the app’s data, or uninstall the app. You can contact us for privacy questions at hello@mybackhurts.app.

This website

This website, mybackhurts.app, is a set of static pages hosted by Cloudflare. Cloudflare handles each request, including your IP address, to deliver the site, under Cloudflare’s privacy policy, and asks your browser to report to it when the site fails to load. The site’s own request logs, traces, and log exports are turned off in its hosting configuration.

• The site sets no cookies and runs no analytics, advertising, or tracking scripts.
• Its fonts, images, and videos are served from mybackhurts.app itself. Its content security policy lets the pages load files only from mybackhurts.app and make no connections of their own, and its permissions policy keeps them from using your camera, microphone, or location.
• To show the page in your language and put your device’s store first, the page reads your browser’s preferred language and platform, in your browser. If you choose a theme or a language, your browser remembers the choice in its local storage; it is not sent to us.
• Links to other sites, such as the stores, open only when you follow them, and the site asks your browser not to tell those sites which page you came from.

Changes

We may update this policy when the app, this website, or applicable requirements change. The date above shows when it was last revised.