# qw-data CertChecker

> qw-data CertChecker (iPhone/iPad app by Rainer Hagemann.)

- Source: https://appshunter.io/ios/app/qw-data-certchecker/id1133131608 (this page in markdown: same URL + `.md`)
- Developer: [Rainer Hagemann](https://appshunter.io/developer/980943714)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 1 MB
- Languages: American English
- Released: 2016-07-20
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/qw-data-certchecker/id1133131608/reviews.md

## What is qw?

This App is a demonstrator for QR-Codes on EuroWeld certificates. You can read QR-Codes that are created by the program EuroWeld. CertChecker analyses the QR-Code and shows the parts in a readable form. 
Additional it checks the signature and says if it is valid or invalid.
With the Certipedia-Button you can call the official Certipedia-Website to check your EuroWeld certificate.


## Version history (last 5 releases)

### 1.1.0 — 2026-08-25

Updated for current iOS versions with improved QR-code recognition, more reliable navigation, and bilingual privacy information.

### 1.0.0 — 2019-11-04

- bug fixes

### 0.0.3 — 2019-10-28

- bug fixes

### 0.0.2 — 2019-10-09

- updated design
- updated company information

### 0.0.1 — 2016-07-20

This update is signed with Apple’s latest signing certificate. No new features are included.

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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 2026-08-27.*