# Retro Flex vs The SIX

The clearest difference is update cadence: The SIX at weekly against Retro Flex's every 6 weeks. 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.

Retro Flex ships an update every 6 weeks, The SIX weekly. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Retro Flex | The SIX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 40 MB | 96 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Fit Cloud Technology Limited](https://appshunter.io/developer/1079311129) | [Archon Combine Limited](https://appshunter.io/developer/1760744242) |

## What reviewers say

### Retro Flex

[App page](https://appshunter.io/ios/app/retro-flex/id6476487882)

**Features:** macOS Compatibility

**In-app purchases:** none


### The SIX

[App page](https://appshunter.io/ios/app/the-six/id6748236697)

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

**In-app purchases:** none


## Frequently asked questions

### Is Retro Flex free?

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

### Is The SIX free?

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

### Do Retro Flex or The SIX have ads?

Neither Retro Flex nor The SIX shows ads.

### Which is updated more often, Retro Flex or The SIX?

Retro Flex ships an update every 6 weeks, and The SIX weekly. Most recently, Retro Flex was updated on October 13, 2026 and The SIX on October 5, 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.*