# GSL Smart ESS vs Quick QR & Barcode Scanner

The clearest difference is price: GSL Smart ESS at Free against Quick QR & Barcode Scanner's $0.99. GSL Smart ESS also leads on ads (none vs shown). Quick QR & Barcode Scanner's advantage is update cadence (every 4 months vs every 9 months). On in-app purchases, device support and iOS requirement there is nothing between them.

GSL Smart ESS is free to download; Quick QR & Barcode Scanner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSL Smart ESS ships an update every 9 months, Quick QR & Barcode Scanner every 4 months. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | GSL Smart ESS | Quick QR & Barcode Scanner |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 4 months** |
| Size | 37 MB | 71 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHENZHEN GSL ENERGY CO LTD](https://appshunter.io/developer/1873857076) | [Khairul Anwar](https://appshunter.io/developer/1779204408) |

## What reviewers say

### GSL Smart ESS

[App page](https://appshunter.io/ios/app/gsl-smart-ess/id6504597237)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Quick QR & Barcode Scanner

[App page](https://appshunter.io/ios/app/quick-qr-and-barcode-scanner/id6738110201)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GSL Smart ESS free?

GSL Smart ESS is free to download, with no in-app purchases.

### Is Quick QR & Barcode Scanner free?

Quick QR & Barcode Scanner costs $0.99, with no in-app purchases.

### Do GSL Smart ESS or Quick QR & Barcode Scanner have ads?

Quick QR & Barcode Scanner shows ads; GSL Smart ESS does not.

### Which is updated more often, GSL Smart ESS or Quick QR & Barcode Scanner?

GSL Smart ESS ships an update every 9 months, and Quick QR & Barcode Scanner every 4 months. Most recently, GSL Smart ESS was updated on October 2, 2026 and Quick QR & Barcode Scanner on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*