# Openings Mastermind vs Chess Notation Trainer Pro

The clearest difference is price: Openings Mastermind at Free against Chess Notation Trainer Pro's $4.99. Chess Notation Trainer Pro's advantage is update cadence (every 6 days vs fortnightly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Openings Mastermind is free to download; Chess Notation Trainer Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Openings Mastermind ships an update fortnightly, Chess Notation Trainer Pro every 6 days. The most recent releases landed on September 19, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Openings Mastermind | Chess Notation Trainer Pro |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/openings-mastermind/id6448386251/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 6 days** |
| Monetization | Free | — |
| Size | 88 MB | 26 MB |
| Requires iOS | 18.6 | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christian Heise](https://appshunter.io/developer/1632898424) | [Nishat Majid](https://appshunter.io/developer/1727207034) |

## What reviewers say

### 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


### Chess Notation Trainer Pro

[App page](https://appshunter.io/ios/app/chess-notation-trainer-pro/id6478752238)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Openings Mastermind free?

Openings Mastermind is free to download, with no in-app purchases.

### Is Chess Notation Trainer Pro free?

Chess Notation Trainer Pro costs $4.99, with no in-app purchases.

### Do Openings Mastermind or Chess Notation Trainer Pro have ads?

Neither Openings Mastermind nor Chess Notation Trainer Pro shows ads.

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

Openings Mastermind ships an update fortnightly, and Chess Notation Trainer Pro every 6 days. Most recently, Openings Mastermind was updated on September 19, 2026 and Chess Notation Trainer Pro on September 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.*