# OpeningTree vs Color One Pro

The clearest difference is price: Color One Pro at Free against OpeningTree's $0.99. Color One Pro also leads on rating (5.0 vs 4.4). OpeningTree's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 10 months). On ads and device support there is nothing between them.

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

Color One Pro holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: OpeningTree has 31 ratings behind it against 1, so its average is the more settled of the two.

OpeningTree ships an update every 2 months, Color One Pro every 10 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | OpeningTree | Color One Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.4 (31 ratings)](https://appshunter.io/ios/app/openingtree-chess-openings/id882614935/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/color-one-pro/id1437829358/reviews)** |
| Number of ratings | **31** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Paid | **Free** |
| Size | 52 MB | 11 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Adams](https://appshunter.io/developer/743520896) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### OpeningTree

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

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


### Color One Pro

[App page](https://appshunter.io/ios/app/color-one-pro/id1437829358)

A puzzle game where players aim to fill the entire board with a single color. Select adjacent colors to expand your colored area, but be mindful of the move limit. Compete for high scores on the leaderboard.

**Highlights:** Fill playing field with one color, Expand colored area, Limited color selections, Leaderboard for scores, Simple tap controls

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertising | $1.99 | one-time |


## Frequently asked questions

### Is OpeningTree free?

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

### Is Color One Pro free?

Color One Pro is free to download, with in-app purchases available.

### Which has better reviews, OpeningTree or Color One Pro?

Color One Pro is rated higher. OpeningTree averages 4.4 out of 5 from 31 ratings, while Color One Pro averages 5.0 from 1 ratings.

### Do OpeningTree or Color One Pro have ads?

Neither OpeningTree nor Color One Pro shows ads.

### Which is updated more often, OpeningTree or Color One Pro?

OpeningTree ships an update every 2 months, and Color One Pro every 10 months. Most recently, OpeningTree was updated on November 1, 2026 and Color One Pro on November 2, 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.*