# Retgen vs QC Solar

The clearest difference is update cadence: Retgen at every 2 weeks against QC Solar's every 3 months. QC Solar's advantage is iOS requirement (13.0 vs 15). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Retgen ships an update every 2 weeks, QC Solar every 3 months. The most recent releases landed on October 30, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Retgen | QC Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Size | 34 MB | 80 MB |
| Requires iOS | 15 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Rast Teknoloji](https://appshunter.io/developer/1610709328) | [Suzhou Jiale Information Technology Co., Ltd.](https://appshunter.io/developer/1171647925) |

## What reviewers say

### Retgen

[App page](https://appshunter.io/ios/app/retgen/id1610709326)

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

**In-app purchases:** none


### QC Solar

[App page](https://appshunter.io/ios/app/qc-solar/id6596742586)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Retgen free?

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

### Is QC Solar free?

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

### Do Retgen or QC Solar have ads?

Neither Retgen nor QC Solar shows ads.

### Which is updated more often, Retgen or QC Solar?

Retgen ships an update every 2 weeks, and QC Solar every 3 months. Most recently, Retgen was updated on October 30, 2026 and QC Solar on October 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.*