# Plotter vs Chessbook

The clearest difference is review sentiment: Chessbook at 83% against Plotter's 0%. Chessbook also leads on price (Free vs $0.99) and rating (4.9 vs 1.0). Plotter's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.0). On ads and device support there is nothing between them.

Chessbook is free to download; Plotter costs $0.99 up front. Chessbook sells 2 in-app purchases, starting at $7.99 per month. Plotter asks for nothing beyond the download.

Chessbook holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Chessbook has 2.1K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Plotter's written reviews are positive against 83% of Chessbook's.

Plotter ships an update every 7 months, Chessbook every 3 days. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Plotter | Chessbook |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/plotter/id305997268/reviews) | **[4.9 (2.1K ratings)](https://appshunter.io/ios/app/chessbook-master-openings/id6466343415/reviews)** |
| Number of ratings | 2 | **2.1K** |
| Positive reviews | 0.0% of reviews | **82.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 118 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Chessbook](https://appshunter.io/developer/1707243137) |

## What reviewers say

### Plotter

[App page](https://appshunter.io/ios/app/plotter/id305997268)

Easily plot graphs of mathematical functions by entering formulas and specifying a range. Supports multiple functions and offers interactive chart themes. Share your plots via email.

**Highlights:** Plot graphs of functions, Enter formulas and specify range, Plot multiple functions, Interactive chart themes, Email charts and formulas

**Features:** macOS Compatibility

**In-app purchases:** none


### Chessbook

[App page](https://appshunter.io/ios/app/chessbook-master-openings/id6466343415)

Build a personalized chess opening repertoire with spaced repetition training. Identify weaknesses, learn optimal moves based on master game data, and avoid obscure lines. Review your online games for mistakes and master middlegame plans.

**Highlights:** Custom opening repertoire creation, Spaced repetition training, Automatic gap identification, Avoid obscure moves, Handle transpositions, Review online game mistakes, Learn middlegame plans

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chessbook Pro - Monthly | $7.99 | per month |
| Chessbook Pro - Annual | $79.99 | per year |

**What reviewers like**

- 🚀 Helpful for learning openings
- 👍 Easy to use and learn
- 🔒 Integrates with chess platforms
- 💡 Personalized repertoire building
- 🚀 Efficient spaced repetition

**What reviewers complain about**

- 🐛 App freezes or crashes
- 🔒 Limited free moves
- 💡 Inconsistent engine analysis
- 🔋 App causes phone to overheat

**Reported bugs**

- App not working on iPad
- Login issues on iPhone
- Inability to delete move sequences

**Requested features**

- Pause after completing move sequences
- Clearer instructions for beginners
- Customizable notification settings
- Option to input and practice specific positions


## Frequently asked questions

### Is Plotter free?

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

### Is Chessbook free?

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

### Which has better reviews, Plotter or Chessbook?

Chessbook is rated higher. Plotter averages 1.0 out of 5 from 2 ratings, while Chessbook averages 4.9 from 2.1K ratings.

### Do Plotter or Chessbook have ads?

Neither Plotter nor Chessbook shows ads.

### Which is updated more often, Plotter or Chessbook?

Plotter ships an update every 7 months, and Chessbook every 3 days. Most recently, Plotter was updated on October 15, 2026 and Chessbook on October 16, 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.*