Chess Openings Explorer Pro vs Openings Mastermind
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Chess Openings Explorer Pro
Master chess openings with a comprehensive dictionary and analysis of over 2 million Grandmaster games. Test your knowledge with interactive quizzes and analyze positions using a powerful built-in engine.
- Chess opening dictionary
- Grandmaster game analysis
- Interactive quiz modes
- Position win/loss/draw stats
- Built-in chess engine
- PGN export
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Explore chess openings and their variations through a simple and friendly interface, and learn the follow-ups from 2 million+ Grandmaster games! Main features: - Complete dictionary of chess openings and their variations - Browse Grandmaster games associated with each opening - Test your knowledge with various Quiz modes: The app picks an opening and your goal is to either find its name, find which move is best, or play the moves that leads to the opening - Accurate stats for each position: % of wins, losses, draws - Powerful built-in Chess engine (2800+ Elo) to analyze any position - Games can be exported to other apps (PGN format) - Search openings by name or ECO code - Easy to use, simple and clean interface - Full translations in French and German, including opening names - And of course, new features will be added over time!
Openings Mastermind
Master chess openings with this app. Import studies, explore with advanced engines, and practice specific lines through repetition. Track your progress and improve your game.
- Import Lichess Studies or PGNs
- Explore openings with Stockfish 15
- Practice openings by repetition
- Smart practice queue
- Track learning progress
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Get ready to take your chess game to the next level with Openings Mastermind, the ultimate chess opening app! Some of the features include: - Import Lichess Studies or custom PGNs - Explore openings with Stockfish 17 and the Lichess position database - Practice openings by repetition against your own custom openings database - Take advantage of the smart practice queue and improve your learning - Observe your learning progress in different openings With our app, you can take your opening game to the next level by practicing against the specific lines you want to master. Whether you're a beginner or an experienced player, our app is the perfect tool to help you improve your opening moves and become a better chess player. Planned Features: - Continue against engine, after study line ends - Analysis of your games from Lichess and Chess.com compared to your openings database
Screenshots
Verdict
The clearest difference is price: Openings Mastermind at Free against Chess Openings Explorer Pro's $3.99. Chess Openings Explorer Pro's advantage is ratings volume (356 vs 6) and rating (4.6 vs 4.3). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Openings Mastermind is free to download; Chess Openings Explorer Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Chess Openings Explorer Pro holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Chess Openings Explorer Pro has 356 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 55% of Chess Openings Explorer Pro's written reviews are positive against 50% of Openings Mastermind's.
Chess Openings Explorer Pro ships an update every 3 weeks, Openings Mastermind fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | Chess Openings Explorer Pro | Openings Mastermind |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.6 (356 ratings) — better | 4.3 (6 ratings) |
| Positive reviews | 54.5% of reviews — better | 50.0% of reviews |
| Number of ratings | 356 — better | 6 |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #100 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 40 MB | 88 MB |
| Age rating | 4+ | 4+ |
| Developer | Emmanuel Mathis | Christian Heise |
Customer experience
Chess Openings Explorer Pro
Openings Mastermind
Bugs and requests
Chess Openings Explorer Pro
Reported bugs
6 issues- Games fail to load with 'failed to load games' error
- Wrong position displayed when accessing games from position
- Text truncation on opening names (iPhone)
- Incompatibility with older devices (iPad 4)
- App crashes or freezes
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- Recent update caused game loading issues
Requested features
12 requests- Built-in chess engine for position evaluation
- Ability to play own moves and get engine feedback
- Play openings against computer opponent
- PGN import functionality
- Quiz mode by opening
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- Deeper variant coverage beyond move 5
- Suggest new openings feature
- Engine analysis when opening book ends
- Better explanation of move choices
- Expanded opening database
- Improved text display for full opening names
- More sophisticated sorting options
Openings Mastermind
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Chess Openings Explorer Pro
No in-app purchases
Openings Mastermind
No in-app purchases
Questions
Is Chess Openings Explorer Pro free?
Is Openings Mastermind free?
Which has better reviews, Chess Openings Explorer Pro or Openings Mastermind?
Do Chess Openings Explorer Pro or Openings Mastermind have ads?
Which is updated more often, Chess Openings Explorer Pro or Openings Mastermind?
Other comparisons
