# C Notebook vs PeterJohn NumPy Matplotlib

The clearest difference is review sentiment: C Notebook at 75% against PeterJohn NumPy Matplotlib's 0%. C Notebook also leads on price ($0.99 vs $12.99) and device support (5 vs 2). PeterJohn NumPy Matplotlib's advantage is in-app purchases (none vs 1). On update cadence, ads and iOS requirement there is nothing between them.

C Notebook costs $0.99 and PeterJohn NumPy Matplotlib $12.99 up front. C Notebook sells 1 in-app purchase, starting at $0.99 per month. PeterJohn NumPy Matplotlib asks for nothing beyond the download.

C Notebook ships an update fortnightly, PeterJohn NumPy Matplotlib every 2 weeks. The most recent releases landed on September 26, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | C Notebook | PeterJohn NumPy Matplotlib |
| --- | --- | --- |
| Price | **$0.99** | $12.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/c-notebook/id1621919001/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **75.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 32 MB | 222 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [铖 邢](https://appshunter.io/developer/1497880786) | [Yasushi Obata](https://appshunter.io/developer/899977114) |

## What reviewers say

### C Notebook

[App page](https://appshunter.io/ios/app/c-notebook/id1621919001)

This application allows users to write, debug, and run C code directly within a note-taking interface. It offers advanced debugging tools like real-time variable monitoring, trend charting, and line-by-line execution. Notes support Markdown formatting, and cloud synchronization enables seamless access across multiple devices.

**Highlights:** C language coding and local debugging, Real-time variable value monitoring and modification, Variable trend charts, Line-by-line code execution, Syntax highlighting and auto-completion, Markdown note support, Cloud synchronization across devices

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| C Notebook Premium | $0.99 | per month |


### PeterJohn NumPy Matplotlib

[App page](https://appshunter.io/ios/app/peterjohn-numpy-matplotlib/id6471342492)

This Python interpreter for iPhone allows you to study data science, deep learning, and reinforcement learning using NumPy and Matplotlib. It provides a user-friendly interface with tutorials and scripts to get started quickly.

**Highlights:** Python interpreter for iPhone, Includes NumPy module, Includes Matplotlib module, Study data science, deep learning, reinforcement learning, Tutorials and example scripts, Run Python scripts

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

**In-app purchases:** none


## Frequently asked questions

### Is C Notebook free?

C Notebook costs $0.99, and also offers in-app purchases.

### Is PeterJohn NumPy Matplotlib free?

PeterJohn NumPy Matplotlib costs $12.99, with no in-app purchases.

### Do C Notebook or PeterJohn NumPy Matplotlib have ads?

Neither C Notebook nor PeterJohn NumPy Matplotlib shows ads.

### Which is updated more often, C Notebook or PeterJohn NumPy Matplotlib?

C Notebook ships an update fortnightly, and PeterJohn NumPy Matplotlib every 2 weeks. Most recently, C Notebook was updated on September 26, 2026 and PeterJohn NumPy Matplotlib on September 20, 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.*