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I received my second shot at the beginning of July when the EU Digital Covid Certificate was put in place. Following that, I got my QR Code and since then I have been looking to store it conveniently on my smartphone.
TousAntiCovid, the official French application, was released back when we had to rely only on contact tracing to slow the spread of coronavirus. It asks for a lot of permissions, beginning with bluetooth (and geolocation), but also to be put in the exceptions of the battery optimization, to be running in the background... Even if it's open source and available on f-droid it requires way too much just to store QR codes.
Having worked with Angular recently for work, I created this little PWA to scan my DCC and show it whenever asked, now that it's required for a lot of activities here. Free of customer requirements, I tried to respect my own ideas: self-hosting capability, no server-side part necessary, no tracking from third-parties scripts.
Funny thing is that it's most probably the first side project I consider completely finished and I'm happy with its current state.
Source code is MIT-licensed, and available here: https://github.com/bchanudet/covid-certificate-pwa
I had limited time and access to iOS devices for testing, any feedback on those devices is appreciated.