# Deep Green vs ChessPrep

The clearest difference is rating: Deep Green at 3.9 against ChessPrep's 3.0. Deep Green also leads on in-app purchases (none vs 3) and review sentiment (66% vs 33%). ChessPrep's advantage is update cadence (every 3 days vs every 4 months) and iOS requirement (12.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. ChessPrep sells 3 in-app purchases, starting at $0.99 per month. Deep Green asks for nothing beyond the download.

Deep Green holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Deep Green has 76 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 66% of Deep Green's written reviews are positive against 33% of ChessPrep's.

Deep Green ships an update every 4 months, ChessPrep every 3 days. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Deep Green | ChessPrep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (76 ratings)](https://appshunter.io/ios/app/deep-green/id299471086/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/chessprep/id6469808213/reviews) |
| Number of ratings | **76** | 2 |
| Positive reviews | **66.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 24 MB | 109 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cocoa Stuff](https://appshunter.io/developer/299471089) | [Stephen Papadatos](https://appshunter.io/developer/1712680449) |

## What reviewers say

### Deep Green

[App page](https://appshunter.io/ios/app/deep-green/id299471086)

This app provides a classical chess experience with a clean, native interface and customizable piece designs. It supports open game formats, offers a unique chess engine with adjustable strength, and features a private, ad-free environment.

**Highlights:** Clean, native user interface, Customizable chess piece designs, Open game format (PGN/FEN), Adjustable strength chess engine, Private and ad-free experience, System-level integration

**In-app purchases:** none

**What reviewers like**

- 🌟 Elegant and polished design
- 🤖 Strong chess engine
- 👍 Intuitive and easy to use
- 🎨 Beautiful graphics and animations
- 🕹️ Smooth gameplay and controls

**What reviewers complain about**

- 🐛 Crashes and stability issues
- ⚠️ Lack of features (e.g. game saving, online play)
- 🔍 Difficulty settings too challenging for some users
- 🔕 Missing audio/sound effects
- 📏 Board/pieces not optimized for larger screens

**Reported bugs**

- App crashes when promoting pawns
- Board orientation issues when rotating device
- Unresponsive UI elements
- Compatibility problems with newer iOS versions

**Requested features**

- Game saving and loading functionality
- Online/multiplayer mode
- Customizable board/piece themes
- Difficulty settings for beginners
- Indicators for check, checkmate, and draw


### ChessPrep

[App page](https://appshunter.io/ios/app/chessprep/id6469808213)

Enhance your chess strategy with a powerful companion app. Build your repertoire from grandmaster moves, analyze opponent responses, and master tactics using a strong chess engine and spaced repetition.

**Highlights:** Build repertoire from grandmaster moves, Analyze opponent responses by elo, Stockfish 16 chess engine, Spaced repetition system, Position analysis and variation calculation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChessButler Monthly Sub | $0.99 | per month |
| ChessButler Yearly Sub | $9.99 | per year |
| ChessButler Lifetime Premium | $19.99 | one-time |


## Frequently asked questions

### Is Deep Green free?

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

### Is ChessPrep free?

ChessPrep is free to download, with in-app purchases available.

### Which has better reviews, Deep Green or ChessPrep?

Deep Green is rated higher. Deep Green averages 3.9 out of 5 from 76 ratings, while ChessPrep averages 3.0 from 2 ratings.

### Do Deep Green or ChessPrep have ads?

Neither Deep Green nor ChessPrep shows ads.

### Which is updated more often, Deep Green or ChessPrep?

Deep Green ships an update every 4 months, and ChessPrep every 3 days. Most recently, Deep Green was updated on October 14, 2026 and ChessPrep on September 30, 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.*