# EngToolBox vs Chess Opening Tactics Trainer

The clearest difference is in-app purchases: EngToolBox at none against Chess Opening Tactics Trainer's 7. EngToolBox also leads on ads (none vs shown). On price, device support 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. EngToolBox asks for nothing beyond the download.

## The numbers

| Metric | EngToolBox | Chess Opening Tactics Trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 months |
| Size | 2 MB | 146 MB |
| Requires iOS | 17.2 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Irfan Uruci](https://appshunter.io/developer/1761565214) | [Dawid Wrzesinski](https://appshunter.io/developer/1812701337) |

## What reviewers say

### EngToolBox

[App page](https://appshunter.io/ios/app/engtoolbox/id6615082500)

**Features:** macOS Compatibility

**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 EngToolBox free?

EngToolBox 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.

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

Chess Opening Tactics Trainer shows ads; EngToolBox does not.

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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.*