# GM ChessPrep vs BookMoves

The clearest difference is update cadence: BookMoves at every 3 weeks against GM ChessPrep's every 42 months. BookMoves also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GM ChessPrep ships an update every 42 months, BookMoves every 3 weeks. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GM ChessPrep | BookMoves |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/bookmoves/id6469711333/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 3 MB | 70 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [GMCHESSPREP LLC](https://appshunter.io/developer/1664061168) | [Regulus Team s.r.o.](https://appshunter.io/developer/1563166617) |

## What reviewers say

### GM ChessPrep

[App page](https://appshunter.io/ios/app/gm-chessprep/id1664061166)

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

**In-app purchases:** none


### BookMoves

[App page](https://appshunter.io/ios/app/bookmoves/id6469711333)

Master chess openings with a unique blend of theory, computer science, and spaced repetition. Memorize hundreds of variants for both sides and transition from rote learning to intuitive application. Overcome the forgetting curve with an innovative technique for lasting mastery.

**Highlights:** Chess opening theory, Spaced repetition learning, Hundreds of chess variants, Statistical probabilities, Integrated scoring system, Algorithmic improvement

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GM ChessPrep free?

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

### Is BookMoves free?

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

### Do GM ChessPrep or BookMoves have ads?

Neither GM ChessPrep nor BookMoves shows ads.

### Which is updated more often, GM ChessPrep or BookMoves?

GM ChessPrep ships an update every 42 months, and BookMoves every 3 weeks. Most recently, GM ChessPrep was updated on October 2, 2026 and BookMoves on October 1, 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.*