# Chess Prep Pro Openings vs 4

The clearest difference is review sentiment: Chess Prep Pro Openings at 75% against 4's 0%. Chess Prep Pro Openings also leads on rating (4.5 vs 1.0) and ratings volume (22 vs 1). 4's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price 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. 4 asks for nothing beyond the download.

Chess Prep Pro Openings holds the better App Store score, 4.5 against 1.0. 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 0% of 4's.

Chess Prep Pro Openings ships an update fortnightly, 4 every 3 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Chess Prep Pro Openings | 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (22 ratings)](https://appshunter.io/ios/app/chess-prep-pro-openings/id1606629475/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/4-in-a-row-solver/id6757250440/reviews) |
| Number of ratings | **22** | 1 |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 214 MB | 6 MB |
| Requires iOS | **15.0** | 26.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Tomasz Bogun](https://appshunter.io/developer/1502902123) | [Jacob Mish](https://appshunter.io/developer/1861938854) |

## 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 |


### 4

[App page](https://appshunter.io/ios/app/4-in-a-row-solver/id6757250440)

Enhance your Connect 4 strategy with an advanced AI that analyzes the board in real-time, identifies forced wins, and teaches you tactics. Enjoy an intuitive interface and flexible play modes designed for both casual fun and competitive play.

**Highlights:** Advanced AI engine (Minimax with Alpha-Beta pruning), Real-time game analysis and forced win detection, Interactive drag-and-drop controls, Player vs AI and AI vs Player modes, Stunning iOS-exclusive "Glassmorphism" design, No data tracking or accounts required

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Chess Prep Pro Openings free?

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

### Is 4 free?

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

### Which has better reviews, Chess Prep Pro Openings or 4?

Chess Prep Pro Openings is rated higher. Chess Prep Pro Openings averages 4.5 out of 5 from 22 ratings, while 4 averages 1.0 from 1 ratings.

### Do Chess Prep Pro Openings or 4 have ads?

Chess Prep Pro Openings shows ads; 4 does not.

### Which is updated more often, Chess Prep Pro Openings or 4?

Chess Prep Pro Openings ships an update fortnightly, and 4 every 3 days. Most recently, Chess Prep Pro Openings was updated on October 27, 2026 and 4 on October 25, 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.*