# Smart Solar vs Useful QR Code Reader PRO

The clearest difference is price: Smart Solar at Free against Useful QR Code Reader PRO's $2.99. Smart Solar also leads on iOS requirement (12.0 vs 15.6). Useful QR Code Reader PRO's advantage is update cadence (every 9 days vs every 2 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

Smart Solar is free to download; Useful QR Code Reader PRO costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Smart Solar ships an update every 2 months, Useful QR Code Reader PRO every 9 days. The most recent releases landed on September 19, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Smart Solar | Useful QR Code Reader PRO |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Size | 108 MB | 39 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Intelade Inc.](https://appshunter.io/developer/590626449) | [katapu.net](https://appshunter.io/developer/381898924) |

## What reviewers say

### Smart Solar

[App page](https://appshunter.io/ios/app/smart-solar/id6443642795)

**Features:** macOS Compatibility

**In-app purchases:** none


### Useful QR Code Reader PRO

[App page](https://appshunter.io/ios/app/useful-qr-code-reader-pro/id6738622977)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smart Solar free?

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

### Is Useful QR Code Reader PRO free?

Useful QR Code Reader PRO costs $2.99, with no in-app purchases.

### Do Smart Solar or Useful QR Code Reader PRO have ads?

Neither Smart Solar nor Useful QR Code Reader PRO shows ads.

### Which is updated more often, Smart Solar or Useful QR Code Reader PRO?

Smart Solar ships an update every 2 months, and Useful QR Code Reader PRO every 9 days. Most recently, Smart Solar was updated on September 19, 2026 and Useful QR Code Reader PRO on September 20, 2026.

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