# OpeningTree vs Chess Opening Blunders

The clearest difference is price: Chess Opening Blunders at Free against OpeningTree's $0.99. Chess Opening Blunders also leads on rating (4.7 vs 4.4) and ratings volume (246 vs 31). OpeningTree's advantage is in-app purchases (none vs 1) and chart position (#198 vs unranked). On review sentiment, update cadence, ads and device support there is nothing between them.

Chess Opening Blunders is free to download; OpeningTree costs $0.99 up front. Chess Opening Blunders sells 1 one-off in-app purchase. OpeningTree asks for nothing beyond the download.

Chess Opening Blunders holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Chess Opening Blunders has 246 ratings behind it against 31, so its average is the more settled of the two. Written reviews point the same way: 83% of OpeningTree's written reviews are positive against 84% of Chess Opening Blunders's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 27, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | OpeningTree | Chess Opening Blunders |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.4 (31 ratings)](https://appshunter.io/ios/app/openingtree-chess-openings/id882614935/reviews) | **[4.7 (246 ratings)](https://appshunter.io/ios/app/chess-opening-blunders/id1129867864/reviews)** |
| Number of ratings | 31 | **246** |
| Positive reviews | 82.6% of reviews | **84.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#198** | — |
| Size | 52 MB | 43 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Adams](https://appshunter.io/developer/743520896) | [Chess King](https://appshunter.io/developer/1096660597) |

## What reviewers say

### OpeningTree

[App page](https://appshunter.io/ios/app/openingtree-chess-openings/id882614935)

**Currently charting:** #198 Top Paid · Board (US App Store)

Explore chess openings with an extensive opening book and engine analysis. Analyze your games, create custom lines, and study moves from high-rated players. Accessible for visually impaired users.

**Highlights:** Extensive opening book, Crafty engine analysis, Load and analyze PGN games, Create custom move lines, Accessible for visually impaired, Mark moves with colors, Save board to PGN

**Features:** Vision Pro support

**In-app purchases:** none


### Chess Opening Blunders

[App page](https://appshunter.io/ios/app/chess-opening-blunders/id1129867864)

Learn chess by studying common opening mistakes and traps. This app offers interactive lessons with over 1,250 exercises across more than 40 openings, acting as a personal coach to guide you through challenges.

**Highlights:** Learn opening mistakes and traps, Over 1,250 instructive exercises, Covers more than 40 chess openings, Interactive lessons with hints and explanations, Play positions against the computer, Monitors player rating (ELO)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full course | $12.99 | one-time |


## Frequently asked questions

### Is OpeningTree free?

OpeningTree costs $0.99, with no in-app purchases.

### Is Chess Opening Blunders free?

Chess Opening Blunders is free to download, with in-app purchases available.

### Which has better reviews, OpeningTree or Chess Opening Blunders?

Chess Opening Blunders is rated higher. OpeningTree averages 4.4 out of 5 from 31 ratings, while Chess Opening Blunders averages 4.7 from 246 ratings.

### Do OpeningTree or Chess Opening Blunders have ads?

Neither OpeningTree nor Chess Opening Blunders shows ads.

### Which is updated more often, OpeningTree or Chess Opening Blunders?

OpeningTree ships an update every 2 months, and Chess Opening Blunders every 2 months. Most recently, OpeningTree was updated on September 27, 2026 and Chess Opening Blunders on September 28, 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.*