Privacy policy

Effective date: November 10, 2026

Summary

BOX CLOCK (“the app”) is an interval timer that runs on your device. The app doesn't use the network, doesn't create accounts, and doesn't collect, send or share any data. It has no ads, analytics or tracking.

Data stored on your device

• Settings: workout format, the time for each format, the get-ready countdown, sound and volume, vibration and when to vibrate, interface language, and the exercise name you enter when sharing.
• Workout progress: saved while timing and when paused, so you can pick up from the pause point after the app is closed or the phone shuts down. It's cleared when the workout ends, is reset or you go back.
• This data stays on your device and is deleted when you delete the app.

Camera and photos

• The app only opens the camera or the system photo picker when you tap “Take a photo” or “Choose a photo”, and only receives the one photo you take or pick.
• Photos are combined with your result on the device and never uploaded. The app doesn't keep copies of photos or combined images.
• The combined image is added to your photo library only when you tap “Save”. When you tap “Share”, it goes to the app you choose in the system share sheet, which then decides what to do with it.
• “Copy text” puts your result text on the device clipboard.

Permissions

• iPhone: camera (when taking a photo) and adding to Photos (when saving a combined image). The system asks the first time each is used, and you can turn them off at any time in Settings.
• Android: vibration. On Android 9 and earlier, saving a combined image requires storage permission. Photos are taken with the system camera.
• The app doesn't ask for location, contacts, microphone or any other permission, and doesn't use a network connection.

Device check before you start

When you tap “Start workout”, the app reads the media volume, power saving mode, battery level and whether the screen can stay on, only to show you a warning on screen. None of this is stored or sent.

This website

Tapping “How to use” or “Privacy policy” in the app opens this website in your browser. The site is hosted on Cloudflare Pages and uses no cookies, analytics or tracking, and loads no third-party resources. To deliver pages and protect against attacks, Cloudflare processes connection information such as your IP address; see Cloudflare's privacy policy.

Children

The app doesn't collect data from anyone, including children.

Changes to this policy

If this policy changes, this page will be updated along with the effective date.

Contact

Developer: Jerry Lin
Email: service@crazyjerry.studio