# 27words vs Chess Opening Tactics Trainer

The clearest difference is in-app purchases: 27words at none against Chess Opening Tactics Trainer's 7. 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. 27words asks for nothing beyond the download.

## The numbers

| Metric | 27words | Chess Opening Tactics Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | — | Every 2 months |
| Size | 4 MB | 146 MB |
| Requires iOS | **15.5** | 16.4 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [Daniil Semenov](https://appshunter.io/developer/1653926401) | [Dawid Wrzesinski](https://appshunter.io/developer/1812701337) |

## What reviewers say

### 27words

[App page](https://appshunter.io/ios/app/27words/id6446810113)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 27words free?

27words is free to download, with no in-app purchases.

### Is Chess Opening Tactics Trainer free?

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

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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.*