covidpass VS health-cards-dev-tools

I'm sorry, I just checked and same problem for me. Maybe you should contact the dev? https://github.com/covidpass-org/covidpass

Their code is supposedly open source so you can read their public repo here: https://github.com/covidpass-org/covidpass

Yeah, you'd think so, wouldn't you. Unfortunately, two factors conspire to make that impossible. Firstly, the QR code for the vaccine card is based upon the Smart Health Card standard, which does it's best to generate the smallest payload possible, but it still ends up being ~1.7KB, which is on the large side for a QR code. Secondly, Apple always applies the "medium" error correction level to QR codes on a pass, and only displays them at a fixed size. Both of these combine to make a QR code on the pass that is too small and too dense to be scanned properly (at least by a smartphone when both devices are handheld). More details in this GitHub issue for another service that is trying to achieve this.

I understand your concerns. This is why the code of the web app and the API is publicly available on GitHub for everyone to see how and what data is processed. Please also consider reading the Privacy Policy.

The whole project is openly available on GitHub, so everyone can check how their data is processed. I have no ambitions to make profits of this but there is a donation link on the bottom of the page to cover the server costs :)

The data format is an open standard, and so there's absolutely nothing stopping other countries from adopting it (aside from politics). Microsoft even has some sample code on github for doing basic validation, and there are also iOS and android apps for doing validation, too.