A chang vs QR FLOW
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
A chang
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This APP connects to the visual earpiece device via wireless WiFi. It enables you to view the close-up camera footage directly on your mobile phone in real time. When viewing the footage, you can flip the image. You can also take photos and record videos to save the current scene in your phone's photo album. There is also a built-in album where you can view the photos and videos.
QR FLOW
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QR Flow is a simple and fast QR code app for everyday use. Create QR codes in seconds, scan codes with your camera, and keep track of your previous activity in history. The app is designed to be clean, practical, and easy to use. Features: - Generate QR codes quickly - Scan QR codes instantly - Save and review scan history - Use the app in 3 languages - Simple and user-friendly interface Whether you need QR codes for personal use, work, or sharing information, QR Flow keeps everything in one place.
Screenshots
Verdict
The clearest difference is ads: A chang at none against QR FLOW's shown. A chang also leads on iOS requirement (13 vs 15.1). QR FLOW's advantage is update cadence (daily vs fortnightly). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
A chang ships an update fortnightly, QR FLOW daily. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.
| Parameter | A chang | QR FLOW |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 — better | 15.1 |
| Further details — not scored | ||
| Size | 2 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Shenglong Technology Co., Ltd | Omar Bilbisi |
In-app purchases
A chang
No in-app purchases
QR FLOW
No in-app purchases
