Openings Mastermind vs Opening Prep
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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
Opening Prep
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Opening Prep: Chess Trainer is a chess opening trainer for studying and memorizing chess openings from your own PGN repertoire. Import PGN files or paste PGN text, organize your opening repertoire, and train chess lines move by move directly on the board. Opening Prep: Chess Trainer is built for focused opening preparation, repertoire study, and fast memorization of opening variations. Train as White, Black, or both sides, review repertoire trees, continue previous training sessions, and improve difficult positions with targeted repetition. Perfect for tournament preparation, online chess, and daily opening practice. Features • Import chess repertoires from PGN files • Paste PGN text directly into the app • Train chess openings as White, Black, or both • Practice opening lines move by move • Continue previous training sessions anytime • Continue training for a specific repertoire • Study repertoire trees and branching variations • Preview repertoire lines before training • Autoplay repertoire variations on the board • Tap moves in notation to jump to any position • Track mistakes, accuracy, and training streaks • Train difficult positions and weak opening lines • Quick actions for new sessions and hardest positions • Optional move sounds and haptic feedback • Works fully offline with local storage • No account required Opening Prep: Chess Trainer is a lightweight PGN repertoire trainer designed for serious chess opening preparation without unnecessary complexity.
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Verdict
The clearest difference is update cadence: Opening Prep at every 4 days against Openings Mastermind's fortnightly. Opening Prep also leads on iOS requirement (16.6 vs 18.6). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Openings Mastermind ships an update fortnightly, Opening Prep every 4 days. Both last shipped on October 24, 2026.
| Parameter | Openings Mastermind | Opening Prep |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (6 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 | 16.6 — better |
| Further details — not scored | ||
| Size | 88 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Heise | Roman Bogatenko |
In-app purchases
Openings Mastermind
No in-app purchases
Opening Prep
No in-app purchases
Questions
Is Openings Mastermind free?
Is Opening Prep free?
Do Openings Mastermind or Opening Prep have ads?
Which is updated more often, Openings Mastermind or Opening Prep?
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