# PGN Trainer vs OpeningBook

PGN Trainer and OpeningBook are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. PGN Trainer sells 3 in-app purchases, starting at $7.99 per year and OpeningBook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | PGN Trainer | OpeningBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pgn-trainer-chess-openings/id6757391707/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Freemium | — |
| Size | 121 MB | 4 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Smart World Innovations LLC](https://appshunter.io/developer/1866576406) | [Zhenghong Peng](https://appshunter.io/developer/6797348186) |

## What reviewers say

### PGN Trainer

[App page](https://appshunter.io/ios/app/pgn-trainer-chess-openings/id6757391707)

Master chess openings with a personalized repertoire builder. Import PGNs, download studies, and train using spaced repetition and engine analysis. Syncs across devices.

**Highlights:** Build custom chess opening repertoires, Import PGN files and download studies, Search openings by move sequence or ECO, Train with spaced repetition, Analyze games with engine integration, Sync library across iPhone, iPad, and Mac

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QueenBeak | $7.99 | per year |
| KnightBeak | $5.99 | one-time |
| KingBeak | $19.99 | one-time |


### OpeningBook

[App page](https://appshunter.io/ios/app/openingbook/id6805625863)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Training Mode | $3.99 | one-time |


## Frequently asked questions

### Is PGN Trainer free?

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

### Is OpeningBook free?

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

### Do PGN Trainer or OpeningBook have ads?

Neither PGN Trainer nor OpeningBook shows ads.

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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.*