# Chess Prep Pro Openings vs Grandmaster Chess Clock

The clearest difference is rating: Grandmaster Chess Clock at 5.0 against Chess Prep Pro Openings's 4.5. Grandmaster Chess Clock also leads on update cadence (every 2 days vs fortnightly) and review sentiment (100% vs 75%). Chess Prep Pro Openings's advantage is ratings volume (22 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Chess Prep Pro Openings sells 3 in-app purchases, starting at $3.99 per month and Grandmaster Chess Clock sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Grandmaster Chess Clock holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Chess Prep Pro Openings has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Chess Prep Pro Openings's written reviews are positive against 100% of Grandmaster Chess Clock's.

Chess Prep Pro Openings ships an update fortnightly, Grandmaster Chess Clock every 2 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Chess Prep Pro Openings | Grandmaster Chess Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (22 ratings)](https://appshunter.io/ios/app/chess-prep-pro-openings/id1606629475/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/grandmaster-chess-clock/id6746950623/reviews)** |
| Number of ratings | **22** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 214 MB | 54 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tomasz Bogun](https://appshunter.io/developer/1502902123) | [Aras Atakligan](https://appshunter.io/developer/1819101189) |

## What reviewers say

### Chess Prep Pro Openings

[App page](https://appshunter.io/ios/app/chess-prep-pro-openings/id1606629475)

Master chess openings by building custom repertoires and training your memory. Analyze opponent moves, discover blind spots, and utilize an advanced engine for in-depth preparation. Expand your knowledge with downloadable repertoires and import/export PGNs.

**Highlights:** Custom chess opening repertoires, Repertoire training and memory sharpening, Blind spot finder against player games, Chess openings player database, Advanced StockFish engine analysis, Downloadable and importable repertoires

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly premium subscription | $3.99 | per month |
| Yearly premium | $24.99 | per year |
| Lifetime Premium | $59.99 | one-time |


### Grandmaster Chess Clock

[App page](https://appshunter.io/ios/app/grandmaster-chess-clock/id6746950623)

This app provides precise timing for chess games, supporting various time controls and offering detailed game history tracking. It allows users to record, share, and analyze their games, making it ideal for tournament players and enthusiasts looking to improve their time management.

**Highlights:** Versatile time controls (Rapid, Blitz, Bullet), Customizable time settings with increment/delay, Automatic game recording and detailed statistics, Share and export game records and history, Tournament-ready precision timing, Elegant dark theme and intuitive interface, Multi-language support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clock Pro Monthly | $4.99 | per month |
| Clock Pro Annual | $24.99 | per year |
| Clock Pro Lifetime | $44.99 | one-time |


## Frequently asked questions

### Is Chess Prep Pro Openings free?

Chess Prep Pro Openings is free to download, with in-app purchases available.

### Is Grandmaster Chess Clock free?

Grandmaster Chess Clock is free to download, with in-app purchases available.

### Which has better reviews, Chess Prep Pro Openings or Grandmaster Chess Clock?

Grandmaster Chess Clock is rated higher. Chess Prep Pro Openings averages 4.5 out of 5 from 22 ratings, while Grandmaster Chess Clock averages 5.0 from 1 ratings.

### Do Chess Prep Pro Openings or Grandmaster Chess Clock have ads?

Both Chess Prep Pro Openings and Grandmaster Chess Clock show ads.

### Which is updated more often, Chess Prep Pro Openings or Grandmaster Chess Clock?

Chess Prep Pro Openings ships an update fortnightly, and Grandmaster Chess Clock every 2 days. Most recently, Chess Prep Pro Openings was updated on October 27, 2026 and Grandmaster Chess Clock on October 24, 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.*