# CosmoGen vs Retro TD

The clearest difference is in-app purchases: CosmoGen at none against Retro TD's 2. Retro TD's advantage is update cadence (every 3 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Retro TD sells 2 one-off in-app purchases. CosmoGen asks for nothing beyond the download.

CosmoGen ships an update every 3 months, Retro TD every 3 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CosmoGen | Retro TD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Size | 10 MB | 11 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 9+ |
| Developer | [pezhman mohammadzadehkordestani](https://appshunter.io/developer/1888276473) | [Doug Barrett](https://appshunter.io/developer/1527536178) |

## What reviewers say

### CosmoGen

[App page](https://appshunter.io/ios/app/cosmogen/id6761415082)

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

**In-app purchases:** none


### Retro TD

[App page](https://appshunter.io/ios/app/retro-td/id6770826389)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4 AI Level Credits | $1.99 | one-time |
| Starter Pack | $2.99 | one-time |


## Frequently asked questions

### Is CosmoGen free?

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

### Is Retro TD free?

Retro TD is free to download, with in-app purchases available.

### Do CosmoGen or Retro TD have ads?

Neither CosmoGen nor Retro TD shows ads.

### Which is updated more often, CosmoGen or Retro TD?

CosmoGen ships an update every 3 months, and Retro TD every 3 days. Most recently, CosmoGen was updated on October 24, 2026 and Retro TD on October 7, 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.*