Comparison

Deep Green vs Openings Mastermind

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Read full description

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.

About

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.

Highlights
  • Import Lichess Studies or PGNs
  • Explore openings with Stockfish 15
  • Practice openings by repetition
  • Smart practice queue
  • Track learning progress
Features
Read full description

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

Deep Green4 screens
Openings Mastermind4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Deep Green versus Openings Mastermind: the parameters behind the verdict, then further details
ParameterDeep GreenOpenings Mastermind
PriceFreeFree
Rating3.9 (76 ratings)4.3 (6 ratings) — better
Positive reviews66.0% of reviews — better50.0% of reviews
Number of ratings76 — better6
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better18.6
Further details — not scored
Size24 MB88 MB
Age rating4+4+
DeveloperCocoa StuffChristian Heise

Customer experience

Deep Green

All ratings76 ratings
Positive71.1%
Neutral5.3%
Negative23.7%
Written reviews212 reviews
Positive66.0%
Neutral9.9%
Negative24.1%

Openings Mastermind

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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

None

Deep Green

No in-app purchases

None

Openings Mastermind

No in-app purchases

Questions

Is Deep Green free?
Deep Green is free to download, with no in-app purchases.
Is Openings Mastermind free?
Openings Mastermind is free to download, with no in-app purchases.
Which has better reviews, Deep Green or Openings Mastermind?
Openings Mastermind is rated higher. Deep Green averages 3.9 out of 5 from 76 ratings, while Openings Mastermind averages 4.3 from 6 ratings.
Do Deep Green or Openings Mastermind have ads?
Neither Deep Green nor Openings Mastermind shows ads.
Which is updated more often, Deep Green or Openings Mastermind?
Deep Green ships an update every 4 months, and Openings Mastermind fortnightly. Most recently, Deep Green was updated on October 14, 2026 and Openings Mastermind on October 7, 2026.

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