Phylax
A privacy-focused, German-language health profile app that stores personal health records locally with AES-256 encryption, using no cloud services and requiring no account. Suitable for managing your own health data or keeping a care profile for a relative, with full data sovereignty.

Phylax, as it opens in a browser tab.
Not sure how to add Phylax to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
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How to install Phylax as a PWA
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