# Deep Green vs Openings Mastermind

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.

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.

## The numbers

| Metric | Deep Green | Openings Mastermind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (76 ratings)](https://appshunter.io/ios/app/deep-green/id299471086/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/openings-mastermind/id6448386251/reviews)** |
| Number of ratings | **76** | 6 |
| Positive reviews | **66.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Paid | **Free** |
| Size | 24 MB | 88 MB |
| Requires iOS | **16.4** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cocoa Stuff](https://appshunter.io/developer/299471089) | [Christian Heise](https://appshunter.io/developer/1632898424) |

## What reviewers say

### Deep Green

[App page](https://appshunter.io/ios/app/deep-green/id299471086)

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

**In-app purchases:** none

**What reviewers like**

- 🌟 Elegant and polished design
- 🤖 Strong chess engine
- 👍 Intuitive and easy to use
- 🎨 Beautiful graphics and animations
- 🕹️ Smooth gameplay and controls

**What reviewers complain about**

- 🐛 Crashes and stability issues
- ⚠️ Lack of features (e.g. game saving, online play)
- 🔍 Difficulty settings too challenging for some users
- 🔕 Missing audio/sound effects
- 📏 Board/pieces not optimized for larger screens

**Reported bugs**

- App crashes when promoting pawns
- Board orientation issues when rotating device
- Unresponsive UI elements
- Compatibility problems with newer iOS versions

**Requested features**

- Game saving and loading functionality
- Online/multiplayer mode
- Customizable board/piece themes
- Difficulty settings for beginners
- Indicators for check, checkmate, and draw


### Openings Mastermind

[App page](https://appshunter.io/ios/app/openings-mastermind/id6448386251)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*