# Chess Opener PRO — Chess opening trainer

> Chess opening trainer, explorer, and repertoire builder with grandmaster data and engine analysis. (iPhone/iPad app by Stanislav Basovnik.)

- Source: https://appshunter.io/ios/app/chess-opener-pro/id1489282483 (this page in markdown: same URL + `.md`)
- Developer: [Stanislav Basovnik](https://appshunter.io/developer/1469334974)
- Category: Games, Education, Board, Strategy
- Price: $8.99
- Rating: 4.40/5 from 80 App Store ratings · 54 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 146 MB
- Languages: American English, French (France), German (Germany), European Spanish
- Released: 2020-03-02
- Data updated: 2026-08-31
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/chess-opener-pro/id1489282483/reviews.md

## What is Chess Opener PRO?

Features:
- Chess opening tree with game statistics
- The Encyclopedia of Chess Openings (ECO)
- Database of top 100+ grandmasters’ repertoires
- Stockfish chess engine analysis
- Compare ECO, opening tree and engine moves side by side in any position
- Import and export chess openings in PGN format
- Build your own opening repertoire
- Add or edit comments on moves
- Automatically classify any sequence of moves using the ECO system
- Chess opening explorer highlights moves already in your repertoire
- Chess database includes all transpositions
- Interactive trainer to memorize your chess openings and variations
- Train multiple variations at once against random opponent moves from your repertoire
- Set up a starting position for training
- Track your training progress
- Customize chessboard colors and chess pieces
- Supports dark mode
- No ads
- Works completely offline

CHESS OPENING EXPLORER
Search in the Encyclopedia of Chess Openings, browse the chess opening tree, explore the opening repertoires of famous chess grandmasters, or ask the chess engine to find the best moves. Swipe left or right to switch between the exploration features in any position.

BUILD YOUR OPENING REPERTOIRE
Add your favorite opening lines to your repertoire using the chess opening explorer or import your openings in PGN format from other chess programs. You can always edit the names of your openings and organize them in your repertoire.

OPENING TRAINER
A simple and efficient method to memorize variations of openings in your repertoire. You can train either white’s moves or black’s moves only or both. Optionally, you can train all variations at once. The trainer chooses the opponent’s moves randomly from your opening repertoire. Chess Opener tracks your progress and shows your stats.

## Key features

- Chess opening tree with statistics
- Encyclopedia of Chess Openings (ECO)
- Grandmaster repertoire database
- Stockfish engine analysis
- Interactive opening trainer
- Build and manage opening repertoire
- PGN import/export

## Recent user reviews (10 of 54)

All indexed reviews: https://appshunter.io/ios/app/chess-opener-pro/id1489282483/reviews.md

### 5/5 — Impressive app

*2025-11-26*

Good for repertoire,Position setting shall be included

### 4/5 — Feature needed

*2025-08-29*

This app is nearly perfect. I would only like a feature that allows me to start study from a later position in game by importing starting at e.g. move 17. Would have emailed this privately but could not find email. Would be happy to change review to 5 stars.

**Developer response:** Thank you for your feedback! You can start training from a specific position today! Open your opening, jump to the desired move, and start training from the current position. You can train one specific line or multiple variations from the chosen position.

PGN import does not accept partial openings currently. Imported openings must have all moves. Feel free to send me more details to chessopenerapp@gmail.com and we can discuss other options for the imports.

### 5/5 — Great lovely

*2025-08-10*

Superb

### 5/5 — Best app to learn openings

*2025-06-29*

Awesome app. Has 1000s of openings and various ways to learn and practice. Highly recommend it. The best of its kind.

### 5/5 — Top

*2025-03-18*

Simples Prinzip und funktioniert. Kann jetzt knapp 500 Eröffnungsvarianten und hab seit ich die App habe knapp 400 Elo dazu gewonnen. 
Gebe idr kein Geld für Apps aus, aber die Einmalzahlung für so viele Stunden war’s wert.

Was ich mir noch wünschen würde:
Mehrere Ordner zum gleichzeitig Üben wählen zu können, sodass ich aus dem einen Ordner Eröffnungen für Weiß und aus dem Anderen für Schwarz wählen kann, statt immer hin und her wechseln, oder alle Eröffnungen mit beiden Farben lernen zu müssen.
Das würde das Lernen nochmal deutlich angenehmer gestalten.

Weitere Ideen:
Die Option zwischen Figuren normal sichtbar, als Dame Steine sichtbar (also nur Ort und Farbe, aber nicht welche Figur erkennbar) und keine Figur sichtbar hin und her schalten können (dann müsste natürlich der letzte Zug immer angezeigt werden, dies wäre wo derzeit zB “black to move” steht möglich).
So ließe sich mit der App auch blind spielen üben, was wirklich schön wäre.

Fazit: Top App, lohnt sich. Bitte ermöglicht mehrere Ordner gleichzeitig zu üben, während nach Ordnern separat die Farbe gewählt werden kann und absolut Hammer wäre es wenn ihr “blind” üben ermöglicht.

### 3/5 — Hard to understand but clearly powerful

*2025-02-20*

Where can I get a user guide on how to use this app?  It’s clearly powerful but it needs instructions.  I’ll improve my review if I can get some help information.

### 5/5 — Great app

*2025-01-23*

My favorite opening trainer!

### 5/5 — What I am looking for

*2024-11-26*

I have many options on PC for viewing databases and the opening tree of how often moves are played in a certain position. I have explored several apps for iPhone and iPad and none of them even come close to what I want. But this app really does it. It’s very close to chessx or scid on PC. I will use this for my chess students!

**Developer response:** Thank you for your kind words. I really appreciate it!

### 1/5 — Invalid PGN

*2024-07-07, version 1.21.1*

I have a pgn that other apps in android and window pgn readers can open, but this can’t?

### 5/5 — Very Nice but

*2024-05-25*

Very Nice but i would love to see somewhere the +1 if i eat a pawn. Thank you

## Frequently asked questions about Chess Opener PRO

### What does Chess Opener PRO do?

Chess Opener PRO is a comprehensive tool for chess players to master openings. It features an opening explorer, a trainer to memorize variations, and tools to build and manage your personal opening repertoire. It also includes grandmaster repertoires and engine analysis for deeper understanding.

### What are the key features of Chess Opener PRO?

Key features include a chess opening tree with statistics, access to the Encyclopedia of Chess Openings (ECO), a database of top grandmaster repertoires, Stockfish engine analysis for move comparison, and an interactive trainer to memorize your openings. You can also build and edit your own repertoire and import/export openings in PGN format.

### How much does Chess Opener PRO cost?

The application is a paid app, meaning you purchase it once to unlock all its features. There are no in-app purchases or advertisements, ensuring a complete and uninterrupted user experience.

### Is Chess Opener PRO compatible with my device and can it be used offline?

While specific compatibility details are not provided, the app is designed for mobile devices. Importantly, it works completely offline, allowing you to train and analyze chess openings without an internet connection.

### How can I use Chess Opener PRO to improve my chess game?

You can use the app to study the openings of top grandmasters, build and refine your own opening repertoire, and then use the interactive trainer to memorize variations. The engine analysis helps you understand the best moves in any position, leading to stronger opening play.

## Version history (last 5 releases)

### 1.25.1 — 2026-01-25

NEW Chess engine!
- Faster loading time
- Faster chess analysis
- Configurable CPU usage and analysis time
- Engine moves are highlighted on the chessboard
- Engine settings are now accessible from the menu bellow the engine moves

### 1.24.5 — 2026-01-14

- Performance improvements
- Bug fixes

### 1.24.3 — 2025-10-02

- Performance improvements
- Bug fixes

### 1.24.0 — 2025-09-28

- NEW settings: Manual dark/light app theme
- Bug fixes

### 1.23.3 — 2025-09-08

- Fixed animations

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## More apps by Stanislav Basovnik

- [Chess Opener Lite](https://appshunter.io/ios/app/chess-opener-lite/id1489281014)

All apps by Stanislav Basovnik: https://appshunter.io/developer/1469334974

## Related topics

[chess openings trainer](https://appshunter.io/ios/topics/chess-openings-trainer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*