# Blunderzone vs Chess Trainer

The clearest difference is iOS requirement: Blunderzone at 15.0 against Chess Trainer's 17.0. 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 Chess Trainer sells 7 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Blunderzone ships an update weekly, Chess Trainer every 5 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Blunderzone | Chess Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 187 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [RANKA s.r.o.](https://appshunter.io/developer/352576574) | [Youssef Ziat](https://appshunter.io/developer/1871790298) |

## 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 |


### Chess Trainer

[App page](https://appshunter.io/ios/app/chess-trainer-tactics-and-play/id6804259145)

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $6.99 | per month |
| Yearly Pro | $19.99 | per year |
| 300 coins | $1.99 | one-time |
| 1,000 coins | $4.99 | one-time |
| 2,500 coins | $9.99 | one-time |
| Pro — Lifetime | $14.99 | one-time |
| Lifetime Pro | $34.99 | one-time |


## Frequently asked questions

### Is Blunderzone free?

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

### Is Chess Trainer free?

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

### Do Blunderzone or Chess Trainer have ads?

Neither Blunderzone nor Chess Trainer shows ads.

### Which is updated more often, Blunderzone or Chess Trainer?

Blunderzone ships an update weekly, and Chess Trainer every 5 days. Most recently, Blunderzone was updated on November 5, 2026 and Chess Trainer on November 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*