# Openings Mastermind vs Chess Notation Lab

The clearest difference is review sentiment: Chess Notation Lab at 100% against Openings Mastermind's 50%. Chess Notation Lab also leads on rating (5.0 vs 4.3) and update cadence (every 3 days vs fortnightly). Openings Mastermind's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Chess Notation Lab sells 1 one-off in-app purchase. Openings Mastermind asks for nothing beyond the download.

Chess Notation Lab holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 6 respectively. Written reviews point the same way: 50% of Openings Mastermind's written reviews are positive against 100% of Chess Notation Lab's.

Openings Mastermind ships an update fortnightly, Chess Notation Lab every 3 days. The most recent releases landed on September 19, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Openings Mastermind | Chess Notation Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/openings-mastermind/id6448386251/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/chess-notation-lab/id6480255515/reviews)** |
| Number of ratings | 6 | 6 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | **Free** | Free with in-app purchases |
| 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 Lab

[App page](https://appshunter.io/ios/app/chess-notation-lab/id6480255515)

Master chess board coordinates and piece movement with this training app. Improve your ability to visualize moves, read notation, and understand square colors. Designed to enhance your chess calculations and potentially boost your rating.

**Highlights:** Identify squares by coordinate, Fluid piece movement visualization, Translate moves to notation, Identify square color, Orient on the board, Speed up calculation, Blind chess practice

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $9.99 | one-time |


## Frequently asked questions

### Is Openings Mastermind free?

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

### Is Chess Notation Lab free?

Chess Notation Lab is free to download, with in-app purchases available.

### Which has better reviews, Openings Mastermind or Chess Notation Lab?

Chess Notation Lab is rated higher. Openings Mastermind averages 4.3 out of 5 from 6 ratings, while Chess Notation Lab averages 5.0 from 6 ratings.

### Do Openings Mastermind or Chess Notation Lab have ads?

Neither Openings Mastermind nor Chess Notation Lab shows ads.

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

Openings Mastermind ships an update fortnightly, and Chess Notation Lab every 3 days. Most recently, Openings Mastermind was updated on September 19, 2026 and Chess Notation Lab 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.*