# QR Analyzer — Visualize QR code structure

> Visualize QR code structure (iPhone/iPad app by ao-system, Inc..)

- Source: https://appshunter.io/ios/app/qr-analyzer/id6758965675 (this page in markdown: same URL + `.md`)
- Developer: [ao-system, Inc.](https://appshunter.io/developer/1338624340)
- Category: Productivity, Developer Tools
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.6 · 25 MB
- Languages: English
- Released: 2026-02-10
- Data updated: 2026-07-02
- User reviews in markdown: https://appshunter.io/ios/app/qr-analyzer/id6758965675/reviews.md

## What is QR Analyzer?

QR Analyzer is a visualization and learning tool designed for anyone who wants to understand the internal structure of QR codes.
Unlike typical readers that simply display decoded text, this app reveals how a QR code is constructed through color-coded layers and matrix views.

Key Features
- Capture a QR code with your camera and analyze it instantly
- Color-coded visualization of Finder Patterns, Timing Patterns, Format Information, Version Information, Data modules, and Error Correction (ECC) modules
- Display of mask patterns and the unmasked bit matrix
- Detailed metadata: version, error correction level, mask pattern, size, number of data codewords, and number of ECC codewords

Recommended For
- Students and engineers who want to learn QR code specifications and internal structures
- Developers who need to inspect or debug their own QR libraries or decoders
- Anyone who wants to go beyond simple 'reading' and truly understand how QR codes work

QR Analyzer transforms QR codes from 'a grid of black squares' into a meaningful, structured system you can explore and learn from.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |



## Version history (last 5 releases)

### 1.4.0 — 2026-06-24

Added an option to remove ads (via purchase). Enjoy a more comfortable app experience.

### 1.2.3 — 2026-05-28

Improved overall stability and performance.

### 1.2.0 — 2026-04-27

Based on valuable user feedback, we have significantly improved our QR code structure analysis algorithm.
- Updated data and error correction (ECC) logic to strictly follow ISO/IEC 18004 standards.
- Fixed a bug where "unused bits" were incorrectly displayed in certain versions (e.g., Version 7).
Enjoy more accurate and detailed QR code visualizations!

### 1.1.0 — 2026-03-07

Added a button to the Settings page to open the App Store.

### 1.0.4 — 2026-02-19

Enabled visualization of bit arrays for Data and ECC regions.

## More apps by ao-system, Inc.

- [奥多摩ウォーキングマップ](https://appshunter.io/ios/app/id1453854955)
- [Coin toss. Two sides of a coin](https://appshunter.io/ios/app/coin-toss-two-sides-of-a-coin/id1559344863)
- [Wheel Lottery Machine](https://appshunter.io/ios/app/wheel-lottery-machine/id1559502572)
- [Bingo Machine](https://appshunter.io/ios/app/bingo-machine/id1561300296)
- [Roulette machine](https://appshunter.io/ios/app/roulette-machine/id1561612282)
- [Fortune slip](https://appshunter.io/ios/app/fortune-slip/id1561769646)

All apps by ao-system, Inc.: https://appshunter.io/developer/1338624340

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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 2026-07-02.*