# Chess Defense Trainer vs ReCall Boost

The clearest difference is ads: ReCall Boost at none against Chess Defense Trainer's shown. ReCall Boost also leads on device support (3 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Chess Defense Trainer sells 6 in-app purchases, starting at $2.99 per month and ReCall Boost sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Chess Defense Trainer | ReCall Boost |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Size | 117 MB | 41 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dawid Wrzesinski](https://appshunter.io/developer/1812701337) | [Games StudioTM](https://appshunter.io/developer/1836726535) |

## What reviewers say

### Chess Defense Trainer

[App page](https://appshunter.io/ios/app/chess-defense-trainer/id6747926627)

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

**In-app purchases (6)**

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


### ReCall Boost

[App page](https://appshunter.io/ios/app/recall-boost/id6753765243)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReCall Boost Pro | $1.99 | per month |


## Frequently asked questions

### Is Chess Defense Trainer free?

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

### Is ReCall Boost free?

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

### Do Chess Defense Trainer or ReCall Boost have ads?

Chess Defense Trainer shows ads; ReCall Boost 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.*