Privacy policy

This policy covers Concentric Clock for Android, package ns.app.concentric.clock, operated by Naryab Studio. Updated 7 November 2026.

On-device settings and optional data

App settings and limited widget data are saved privately on the device. Concentric Clock can use Health Connect or device sensors for steps and heart-rate readings, and the device calendar for upcoming events, when you enable the relevant permissions. These readings support clock displays and stay on the device. Health Connect access is read-only; optional history and background permissions support older readings and periodic updates.

Optional rewarded ads

Concentric Clock includes optional rewarded ads using Google AdMob. Google’s User Messaging Platform manages applicable privacy choices. AdMob may process IP addresses, device identifiers, ad interactions and diagnostic information for advertising, measurement and fraud prevention. Health and calendar data are not added to ad requests or reward information.

Available ad privacy choices can be managed in the app’s Settings. See Google’s privacy policy. Ad rewards apply to the installation and may be lost after clearing app storage or uninstalling.

Support messages

Feedback sent from Concentric Clock includes the message, submission reference, manufacturer, model, Android version and API level, app version and language. Health readings, calendar events, location and device identifiers are not attached to support submissions.

The website support form sends your message, its type, the selected app, an optional email address you choose to provide, and a randomly generated submission reference. It does not automatically attach device specifications or contact details. Information you choose to write in your message is also stored.

Messages are stored in a private Cloudflare D1 database and used to provide support and improve the app. They remain until removed by the studio; marking a message Archived does not delete it. Rate-limit records use salted hashes rather than raw IP addresses and expire. Expired records are removed during subsequent requests. See Cloudflare’s privacy policy.

Your choices and requests

You can revoke permissions in Android Settings. Disconnecting health apps clears cached Health Connect readings. Clearing app storage or uninstalling removes local app settings and data; it does not remove messages already sent to support.

To ask about stored support messages or request removal, use Concentric Clock support and include the original submission reference if available. Do not include health records or other sensitive personal information. Browsing this site is covered by the website privacy policy.