Privacy Policy for Checkweight

Last updated: March 26, 2026

Checkweight does not collect, store, or transmit any personal data to any server. All data (food entries, weight entries, and settings) is stored locally on your device only.

Checkweight uses the following external APIs for functionality:
- OpenFoodFacts (https://world.openfoodfacts.org/api/v2/product/{barcode}.json) to retrieve caloric values from product barcodes
- Anthropic Claude Haiku API (https://api.anthropic.com/v1/messages) to estimate caloric values from text/photo inputs

If you choose to provide a Claude API key, it is stored locally on your device and used solely to communicate with the Anthropic API for calorie estimation. No data from these API requests is stored by Checkweight on any server.

Checkweight does not use analytics, tracking, cookies, or advertising.

You can delete all your data at any time by uninstalling the app.

Contact: mail@kohjakob.com