# Smart Solar vs Useful QR Code Reader

The clearest difference is ads: Smart Solar at none against Useful QR Code Reader's shown. Smart Solar also leads on iOS requirement (12.0 vs 15.6). Useful QR Code Reader's advantage is update cadence (weekly vs every 2 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. 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 weekly. Both last shipped on September 19, 2026.

## The numbers

| Metric | Smart Solar | Useful QR Code Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 108 MB | 99 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

[App page](https://appshunter.io/ios/app/useful-qr-code-reader/id6738119243)

**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 free?

Useful QR Code Reader is free to download, with no in-app purchases.

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

Useful QR Code Reader shows ads; Smart Solar does not.

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

Smart Solar ships an update every 2 months, and Useful QR Code Reader weekly. Most recently, Smart Solar was updated on September 19, 2026 and Useful QR Code Reader on September 19, 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.*