# Chess Opening Tactics Trainer vs KarpaChess

The clearest difference is in-app purchases: KarpaChess at none against Chess Opening Tactics Trainer's 7. KarpaChess also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 months). On price and iOS requirement there is nothing between them.

Both are free to download. Chess Opening Tactics Trainer sells 7 in-app purchases, starting at $2.99 per month. KarpaChess asks for nothing beyond the download.

Chess Opening Tactics Trainer ships an update every 2 months, KarpaChess every 3 days. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Chess Opening Tactics Trainer | KarpaChess |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 146 MB | 171 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dawid Wrzesinski](https://appshunter.io/developer/1812701337) | [Mourad GHAFIRI](https://appshunter.io/developer/1896774994) |

## What reviewers say

### Chess Opening Tactics Trainer

[App page](https://appshunter.io/ios/app/chess-opening-tactics-trainer/id6748003312)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Espresso Subscription | $2.99 | per month |
| Flat White Subscription | $5.99 | per 3 months |
| Latte Subscription | $7.99 | per 6 months |
| Super Large Subscription | $12.99 | per year |
| Espresso | $3.99 | one-time |
| Flat White | $6.99 | one-time |
| Latte | $9.99 | one-time |


### KarpaChess

[App page](https://appshunter.io/ios/app/karpachess/id6808091046)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chess Opening Tactics Trainer free?

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

### Is KarpaChess free?

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

### Do Chess Opening Tactics Trainer or KarpaChess have ads?

Chess Opening Tactics Trainer shows ads; KarpaChess does not.

### Which is updated more often, Chess Opening Tactics Trainer or KarpaChess?

Chess Opening Tactics Trainer ships an update every 2 months, and KarpaChess every 3 days. Most recently, Chess Opening Tactics Trainer was updated on October 24, 2026 and KarpaChess on October 23, 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.*