Privacy Policy for Deficit Grams

Last updated: 14th of September 2026

Information We Collect

Deficit Grams does not collect, store, or transmit any personal information or health data to external servers. The app operates strictly on your personal devices (iPhone and paired Apple Watch).

Apple Health & HealthKit Data

Deficit Grams integrates with Apple Health via Apple's HealthKit framework to read and write health and fitness metrics:

• Read access: Dietary Energy (calories/kilojoules eaten), Active Energy Burned, Basal Energy Burned, and Weight (Body Mass) history to calculate your daily energy balance and project weight trends.
• Write access: Body Mass (weight entries), if and when you choose to log your weight directly through the app.

In accordance with Apple App Store Review Guidelines (Guideline 5.1.3):

• Health data read from or written to Apple Health is processed and stored strictly on-device (and in your personal iCloud / Health backups if enabled by you) and is never transmitted to external servers, remote databases, or third parties.
• Health data is never used for advertising, marketing, or use-based data mining, nor is it sold to data brokers.

Data Storage & App Groups

App settings (such as chosen energy units, weight units, calorie baseline, and minimum food intake threshold) and a cached summary snapshot are stored locally on your device and within your private iOS App Group sandbox solely to support iOS Home Screen / Lock Screen widgets and Apple Watch complications. No data leaves your personal devices.

Third-Party Services

Deficit Grams does not use any third-party analytics, tracking, advertising frameworks, or remote diagnostic services.

Contact

If you have any questions or feedback regarding this privacy policy, please contact: jamie.m.williamson@gmail.com

Changes to This Policy

We may update this privacy policy from time to time. Any changes will be posted on this page.