# Chess Prep Pro Openings vs Digital Chess Clock

The clearest difference is in-app purchases: Digital Chess Clock at none against Chess Prep Pro Openings's 3. Digital Chess Clock also leads on ads (none vs shown) and update cadence (every 2 days vs fortnightly). Chess Prep Pro Openings's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price 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. Digital Chess Clock asks for nothing beyond the download.

Chess Prep Pro Openings ships an update fortnightly, Digital Chess Clock every 2 days. The most recent releases landed on October 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Chess Prep Pro Openings | Digital Chess Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (22 ratings)](https://appshunter.io/ios/app/chess-prep-pro-openings/id1606629475/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 214 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tomasz Bogun](https://appshunter.io/developer/1502902123) | [Matthew Webb](https://appshunter.io/developer/1885517571) |

## 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 |


### Digital Chess Clock

[App page](https://appshunter.io/ios/app/digital-chess-clock/id6785083306)

**Features:** macOS Compatibility, 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 Digital Chess Clock free?

Digital Chess Clock is free to download, with no in-app purchases.

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

Chess Prep Pro Openings shows ads; Digital Chess Clock does not.

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

Chess Prep Pro Openings ships an update fortnightly, and Digital Chess Clock every 2 days. Most recently, Chess Prep Pro Openings was updated on October 15, 2026 and Digital Chess Clock on September 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.*