Deep Green vs Openings Mastermind
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Deep Green
This app provides a classical chess experience with a clean, native interface and customizable piece designs. It supports open game formats, offers a unique chess engine with adjustable strength, and features a private, ad-free environment.
- Clean, native user interface
- Customizable chess piece designs
- Open game format (PGN/FEN)
- Adjustable strength chess engine
- Private and ad-free experience
- System-level integration
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A no-nonsense classical chess app. - CLEAN UI: Deep Green offers a distraction-free experience in a clean, native user interface, with Liquid Glass on iOS 26 and later. - CUSTOM PIECE DESIGN: Beautiful chess set designed specifically for Deep Green and rendered at high resolution in both outline and 3D throughout the app. - MADE FOR IPAD: Dedicated menu bar, multiple windows, and refined trackpad, mouse, and Apple Pencil support. Squares highlight as you hover over the board. - MADE FOR IPHONE DUO: Adapts to both displays and every pose. The board centers on the fold like a folding chess board, and the game controls follow the system into the vertical bar. - TIGHT SYSTEM INTEGRATION: System-level sharing, drag and drop, AirDrop, undo/redo, contextual menus, Quick Look previews of chess files, Dark Mode, high contrast support and more. - OPEN GAME FORMAT: Games can be shared, saved, copied, pasted, imported, exported in the ubiquitous, open source PGN and FEN formats. Deep Green can open chess files straight from the Files app. - UNIQUE CHESS ENGINE: Enjoyable opponent with adjustable strength, praised for its humane gameplay, developed for Deep Green on the Apple Newton more than 25 years ago. - TWEAKABLE APPEARANCE: Engage the knights in the game by having them turn towards the center of the board, apply a humane, slightly random placement of the pieces. - IN YOUR LANGUAGE: Available in English, German, and Danish. - MODERN ARCHITECTURE: Written in Swift as a fully native app – modern, maintainable, and prepared for the future. - PRIVATE, AD-FREE: No ads, no tracking, no analytics, no nonsense. If you like Deep Green, please rate it favorably on the App Store.
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 monetization model: Openings Mastermind at free against Deep Green's paid. Openings Mastermind also leads on update cadence (fortnightly vs every 4 months) and rating (4.3 vs 3.9). Deep Green's advantage is review sentiment (66% vs 50%) and ratings volume (76 vs 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 holds the better App Store score, 4.3 against 3.9. That said, the two scores are not equally well evidenced: Deep Green has 76 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 66% of Deep Green's written reviews are positive against 50% of Openings Mastermind's, so the app with the better star average is not the one people write more warmly about.
Deep Green ships an update every 4 months, Openings Mastermind fortnightly. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.
| Parameter | Deep Green | Openings Mastermind |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (76 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 66.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 76 — better | 6 |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.4 — better | 18.6 |
| Further details — not scored | ||
| Size | 24 MB | 88 MB |
| Age rating | 4+ | 4+ |
| Developer | Cocoa Stuff | Christian Heise |
Customer experience
Deep Green
Openings Mastermind
Bugs and requests
Deep Green
Reported bugs
4 issues- App crashes when promoting pawns
- Board orientation issues when rotating device
- Unresponsive UI elements
- Compatibility problems with newer iOS versions
Requested features
5 requests- Game saving and loading functionality
- Online/multiplayer mode
- Customizable board/piece themes
- Difficulty settings for beginners
- Indicators for check, checkmate, and draw
Openings Mastermind
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Deep Green
No in-app purchases
Openings Mastermind
No in-app purchases
Questions
Is Deep Green free?
Is Openings Mastermind free?
Which has better reviews, Deep Green or Openings Mastermind?
Do Deep Green or Openings Mastermind have ads?
Which is updated more often, Deep Green or Openings Mastermind?
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