Privacy Policy

Effective date: September 6, 2026

Short version: Cadence does not collect, transmit, or sell any of your data. There are no accounts, no servers, no analytics, and no ads. Everything lives on your device.

1. Overview

Cadence ("the App") is a screen time self-control app that helps you manage how much time you spend in selected apps. The App is built entirely on Apple's Screen Time APIs (Family Controls, Device Activity, and Managed Settings) and runs locally on your device.

2. Data we collect

We do not collect any data. The App does not:

Collect your name, email address, or any contact information
Track your location
Record your browsing history or app usage history
Include analytics, advertising SDKs, or third-party trackers
Transmit any information off your device

3. Data stored on your device

The following information is stored locally on your device in a private, sandboxed app group container and is never sent anywhere:

Your app selections — stored as opaque system tokens provided by Apple, which cannot be read as app names, URLs, or history by anyone (including us)
Your settings — daily usage budget, break length, and whether the rhythm is enabled
Break schedule — the time your current reset break ends
Critical settings password — stored only as a salted SHA-256 digest. The original password is never stored and cannot be recovered from the digest

This data is removed from your device when you delete the App.

4. Apple Screen Time authorization

To function, the App requests Screen Time authorization through Apple's Family Controls framework. This grants access to Apple's device activity monitoring and app-shielding features. Per Apple's design, Cadence only receives opaque tokens representing your selections — Apple does not expose your actual usage history to the App beyond the threshold events it needs to apply a shield.

5. Children's privacy

Cadence is intended for individuals managing their own device usage. The App does not knowingly collect any personal information from anyone, including children under 13, because it does not collect any information at all.

6. Third-party services

Cadence does not use any third-party services, servers, cloud storage, crash reporting, or analytics frameworks.

7. Changes to this policy

If we make changes to this Privacy Policy, the revised version will be posted on this page with an updated effective date. Because the App has no way to contact you, please review this page periodically.

8. Contact

If you have questions about this Privacy Policy, contact us at m17197693482@163.com.