# Chess Opening Trainer vs Openings Mastermind

The clearest difference is rating: Openings Mastermind at 4.3 against Chess Opening Trainer's 1.4. Openings Mastermind also leads on review sentiment (50% vs 14%) and ads (none vs shown). Chess Opening Trainer's advantage is iOS requirement (9.0 vs 18.6). On price, ratings volume, 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 1.4. Both are backed by a comparable volume of ratings — 7 and 6 respectively. Written reviews point the same way: 14% of Chess Opening Trainer's written reviews are positive against 50% of Openings Mastermind's.

Chess Opening Trainer ships an update every 4 months, Openings Mastermind fortnightly. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Chess Opening Trainer | Openings Mastermind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.4 (7 ratings)](https://appshunter.io/ios/app/chess-opening-trainer/id1106058837/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/openings-mastermind/id6448386251/reviews)** |
| Number of ratings | **7** | 6 |
| Positive reviews | 14.3% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 33 MB | 88 MB |
| Requires iOS | **9.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Propersh LLC](https://appshunter.io/developer/862587473) | [Christian Heise](https://appshunter.io/developer/1632898424) |

## What reviewers say

### Chess Opening Trainer

[App page](https://appshunter.io/ios/app/chess-opening-trainer/id1106058837)

Learn chess openings with a simplified interface that analyzes millions of games. Moves are scored and ordered by popularity, making study straightforward. Test your knowledge with built-in quizzes.

**Highlights:** Simplified interface, Move scoring based on popularity, Analysis of over 2 million games, Straightforward study approach, Opening knowledge testing

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Chess Opening Trainer free?

Chess Opening Trainer 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, Chess Opening Trainer or Openings Mastermind?

Openings Mastermind is rated higher. Chess Opening Trainer averages 1.4 out of 5 from 7 ratings, while Openings Mastermind averages 4.3 from 6 ratings.

### Do Chess Opening Trainer or Openings Mastermind have ads?

Chess Opening Trainer shows ads; Openings Mastermind does not.

### Which is updated more often, Chess Opening Trainer or Openings Mastermind?

Chess Opening Trainer ships an update every 4 months, and Openings Mastermind fortnightly. Most recently, Chess Opening Trainer was updated on October 10, 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.*