# CovidCheck.lu — user reviews

> 4 indexed App Store user reviews of CovidCheck.lu by Centre des technologies de l'information de l'Etat, rated 1.86/5 from 7 ratings.

- Source: https://appshunter.io/ios/app/covidchecklu/id1570218766/reviews
- App overview in markdown: https://appshunter.io/ios/app/covidchecklu/id1570218766.md
- Rating breakdown: 5★ 1 · 4★ 0 · 3★ 1 · 2★ 0 · 1★ 5

## Most critical reviews (4 lowest-rated)

### 1/5 — Valid EU DCC shows as invalid

*2021-12-28, version 1.5.2*

Our vaccination QR codes are valid and show as valid in all other apps I tested, including EU member state published apps.  

Unfortunately in the country we visit during our holiday, almost exclusively this app is being used.  As a result we are not able to visit any restaurant.  Hope the developer can resolve this quickly.

### 1/5 — Gives wrong readings

*2021-12-01, version 1.3.6*

For some reason when using this app on iPhone, it rejects certificates that should pass. 

When using the app on android, it works fine.

### 1/5 — Does not work? Perhaps lack of standardization between  the US and Europe?

*2021-09-05, version 1.2.3*

Going to Europe soon so i downloaded my official « Digital Covid-19 Vaccine Record. 

When scanning i got a beep with an error msg of « error at position « 0 » or something similar. 

Disappointing

### 1/5 — Doesn’t work

*2021-08-13, version 1.2.3*

I’ve been double vaccinated in Luxembourg and have the certificate in paper form; still, upon scanning the QR code, this app shows “unknown code” for 5 criteria. The only criteria it gets right is my name, DOB, and vaccination date. Unless I’m missing something, that makes this app pretty useless.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*