# COSMOS vs DeckLearn

The clearest difference is price: COSMOS at Free against DeckLearn's $0.99. COSMOS also leads on iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

COSMOS is free to download; DeckLearn costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | COSMOS | DeckLearn |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 4 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [yuudai tasaki](https://appshunter.io/developer/1861229093) | [Tucker Briggs](https://appshunter.io/developer/1886975254) |

## What reviewers say

### COSMOS

[App page](https://appshunter.io/ios/app/cosmos-3d-solar-system/id6792780408)

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

**In-app purchases:** none


### DeckLearn

[App page](https://appshunter.io/ios/app/decklearn/id6798065504)

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

**In-app purchases:** none


## Frequently asked questions

### Is COSMOS free?

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

### Is DeckLearn free?

DeckLearn costs $0.99, with no in-app purchases.

### Do COSMOS or DeckLearn have ads?

Neither COSMOS nor DeckLearn shows ads.

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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.*