# Heatmap Chess vs Chess Codex

The clearest difference is in-app purchases: Chess Codex at none against Heatmap Chess's 1. Heatmap Chess's advantage is iOS requirement (13.4 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Heatmap Chess sells 1 one-off in-app purchase. Chess Codex asks for nothing beyond the download.

## The numbers

| Metric | Heatmap Chess | Chess Codex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | — | Every 3 days |
| Size | 19 MB | 36 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Utku Kucu](https://appshunter.io/developer/1896253523) | [Vince Lubbers](https://appshunter.io/developer/1889839785) |

## What reviewers say

### Heatmap Chess

[App page](https://appshunter.io/ios/app/heatmap-chess/id6766252248)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Everything | $4.99 | one-time |


### Chess Codex

[App page](https://appshunter.io/ios/app/chess-codex/id6778615817)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Heatmap Chess free?

Heatmap Chess is free to download, with in-app purchases available.

### Is Chess Codex free?

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

### Do Heatmap Chess or Chess Codex have ads?

Both Heatmap Chess and Chess Codex show 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.*