# Blunderzone vs Learn Chess Openings with Cat

The clearest difference is iOS requirement: Learn Chess Openings with Cat at 13.0 against Blunderzone's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Blunderzone sells 4 in-app purchases, starting at $3.99 per month and Learn Chess Openings with Cat sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Blunderzone ships an update fortnightly, Learn Chess Openings with Cat every 2 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Blunderzone | Learn Chess Openings with Cat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Size | 185 MB | 29 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RANKA s.r.o.](https://appshunter.io/developer/352576574) | [REBRON](https://appshunter.io/developer/1777058665) |

## What reviewers say

### Blunderzone

[App page](https://appshunter.io/ios/app/blunderzone/id6763366751)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blunderzone Basic | $3.99 | per month |
| Blunderzone Premium | $6.99 | per month |
| 20 AI explanations | $4.00 | one-time |
| 100 AI explanations | $18.00 | one-time |


### Learn Chess Openings with Cat

[App page](https://appshunter.io/ios/app/learn-chess-openings-with-cat/id6766206115)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Popular No.4 Semi-Slav Defense | $1.99 | one-time |
| Popular No.5 French Defense | $1.99 | one-time |
| Popular No.6 Caro-Kann Defense | $1.99 | one-time |
| Popular No.7 English Opening | $1.99 | one-time |
| Popular No.8 King’s Indian Attack | $1.99 | one-time |
| Popular No.9 Scandinavian Defense | $1.99 | one-time |
| Popular No.10 Pirc Defense | $1.99 | one-time |
| Unlock All Openings | $7.99 | one-time |


## Frequently asked questions

### Is Blunderzone free?

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

### Is Learn Chess Openings with Cat free?

Learn Chess Openings with Cat is free to download, with in-app purchases available.

### Do Blunderzone or Learn Chess Openings with Cat have ads?

Neither Blunderzone nor Learn Chess Openings with Cat shows ads.

### Which is updated more often, Blunderzone or Learn Chess Openings with Cat?

Blunderzone ships an update fortnightly, and Learn Chess Openings with Cat every 2 weeks. Most recently, Blunderzone was updated on October 25, 2026 and Learn Chess Openings with Cat on October 28, 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.*