Calorie and weight data collected by the Android app looks like this:

`datetime | 2500 kcal | 90 kg`

By using Macrocodex, users become part of a shared data pool. They pay nothing, but they can choose to share this data.

We've this data from 17,000+ users that's what makes this accurate.

Data collection on Android can be disabled by turning off Diagnostics under Profile.

The app does not collect anything beyond this, so there is no way to link the data back to any specific person. It does not even ask for your name.

Furthermore, users can easily delete all collected data by going to *Profile > Clear Data*. During onboarding, the app will also show the Health Connect permission request.

On the web app, there is no reliable way to store persistent data because IndexedDB storage can be wiped by the OS or browser. Because of this, it requires backend to save this data.

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