Skip to main content

Privacy Policy

Effective date: July 9, 2026

This Privacy Policy applies to Quick Health (the "App"), including its iOS app, home-screen and lock-screen widgets, and Apple Watch app, developed and published by Tianjin Matrix Code Technology Co., Ltd. (天津代码矩阵技术有限公司) ("we", "us").

The short version​

Quick Health does not collect your data. The App has no servers, no user accounts, no analytics, no advertising, and no third-party SDKs. Everything you record stays on your device, inside Apple Health and the App's local storage. We never see it.

1. Data we do not collect​

The App contains no networking code and never transmits anything off your device. Specifically, we do not:

  • collect, receive, or store any of your data on any server;
  • require or offer user accounts or registration;
  • use analytics, crash reporting, advertising, or tracking of any kind;
  • embed any third-party SDK;
  • sell, rent, or share any data with anyone.

Under Apple's App Store definitions, the App's privacy label is "Data Not Collected."

2. Health data (Apple Health / HealthKit)​

The App works with the following categories of health data through Apple's HealthKit framework, and only with your explicit permission:

  • Body temperature (including the measurement site you choose)
  • Blood pressure (systolic and diastolic, including optional context such as posture, arm, and time of day)
  • Heart rate (pulse) — only if you choose to enter a pulse alongside a blood pressure reading; it is written as a heart-rate sample paired with that entry

How it is used. The App reads this data solely to display your recent values, history, and trends inside the App, its widgets, and the Watch app. The App writes this data only when you save an entry yourself.

Where it lives. Your health data is stored by Apple Health on your device, under Apple's protections. It is never transmitted by the App to us or to any third party, is never used for advertising, marketing, or data mining, and is never disclosed to anyone. If your Apple Health database syncs across your devices via iCloud, that synchronization is an Apple system feature controlled entirely by you in your device settings — the App itself does not use iCloud.

3. Data stored locally on your device​

To function, the App keeps a small amount of data in its own local storage:

  • Preferences — such as your temperature unit, default measurement options, and your quick-entry metric choice.
  • Custom tags — labels you create for entries, kept in a local database. Tags you attach to an entry are also saved as part of that record's metadata in Apple Health, on-device like everything else.
  • A cached copy of your latest readings — stored in the App's shared container so the widgets and the Watch app can display your most recent values without querying Apple Health every time.

This data never leaves your device. It is deleted when you delete the App. (The Watch app keeps its own on-watch copy, which is deleted when you remove the Watch app.)

4. Widgets and Apple Watch​

The widgets and the Watch app follow exactly the same rules described above: they read from Apple Health and the local cache on-device only, and transmit nothing.

5. Your controls​

You are in full control of your data at all times:

  • Grant or revoke Health access at any time in Settings › Privacy & Security › Health › Quick Health, or in the Health app under Data Access & Devices.
  • Delete individual records you saved with the App in the App's History screen; records created by other apps or devices can be deleted directly in the Health app.
  • Delete everything the App stores by deleting the App (and the Watch app) from your devices.

Because we hold none of your data, there is nothing on our side to access, export, correct, or erase — deleting data on your device removes it completely.

6. Children's privacy​

The App does not knowingly collect data from anyone, including children. The App provides recording and viewing of user-entered health values only and is not directed at children.

7. Your rights​

Depending on where you live (for example, under the GDPR in the European Union or the CCPA in California), you may have legal rights regarding personal data, such as rights of access, correction, deletion, and portability. Because the App collects and transmits no personal data, these rights are satisfied by the on-device controls described in Section 5. If you have any questions or requests, contact us using the details below.

8. Changes to this policy​

If we change how the App handles data, we will update this policy and its effective date before the change ships. Material changes will be noted in the App Store release notes of the version that introduces them.

9. Contact​