# Carnets vs PeterJohn NumPy

The clearest difference is price: Carnets at Free against PeterJohn NumPy's $9.99. Carnets also leads on chart position (#84 vs unranked). PeterJohn NumPy's advantage is update cadence (every 2 weeks vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Carnets is free to download; PeterJohn NumPy costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Carnets ships an update monthly, PeterJohn NumPy every 2 weeks. The most recent releases landed on October 15, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | Carnets | PeterJohn NumPy |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.6 (316 ratings)](https://appshunter.io/ios/app/carnets-jupyter/id1450994949/reviews)** | — |
| Number of ratings | **316** | — |
| Positive reviews | 78.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Best chart rank | **#84** | — |
| Size | 1.4 GB | 222 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Nicolas Holzschuch](https://appshunter.io/developer/1450994948) | [Yasushi Obata](https://appshunter.io/developer/899977114) |

## What reviewers say

### Carnets

[App page](https://appshunter.io/ios/app/carnets-jupyter/id1450994949)

**Currently charting:** #84 Top Free · Developer Tools (US App Store)

This app offers a standalone Jupyter notebook environment for creating and running code snippets, combining them with text and Markdown. It includes pre-installed scientific packages and allows for offline use, making it ideal for education and research.

**Highlights:** Standalone Jupyter notebook implementation, Embedded Python interpreter, Offline functionality, Pre-installed scientific packages, Supports Jupyterlab, Package installation via %pip, Notebook sharing and opening

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent app for coding on iPad
- 👍 Convenient for learning and coding on the go
- 🚀 Works just like Jupyter Notebook on desktop
- 👍 Helpful for self-learning Python
- 👍 Useful for data science and machine learning

**What reviewers complain about**

- 🐛 Bugs and stability issues
- 🔋 Battery drain and overheating
- 🔒 Unauthorized access to photo library
- 🐛 Issues with importing certain libraries like SciPy and Scikit-learn

**Reported bugs**

- Crashes and freezes
- Issues with saving and loading notebooks
- Problems with running scripts and notebooks
- Incompatibility with newer iOS versions

**Requested features**

- Add support for SciPy, Scikit-learn, and other scientific computing libraries
- Improve file management and integration with cloud storage services
- Implement split-screen or multi-window support
- Add more keyboard shortcuts and customization options
- Improve error handling and provide more detailed error messages


### PeterJohn NumPy

[App page](https://appshunter.io/ios/app/peterjohn-numpy/id1662896316)

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

**In-app purchases:** none


## Frequently asked questions

### Is Carnets free?

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

### Is PeterJohn NumPy free?

PeterJohn NumPy costs $9.99, with no in-app purchases.

### Do Carnets or PeterJohn NumPy have ads?

Neither Carnets nor PeterJohn NumPy shows ads.

### Which is updated more often, Carnets or PeterJohn NumPy?

Carnets ships an update monthly, and PeterJohn NumPy every 2 weeks. Most recently, Carnets was updated on October 15, 2026 and PeterJohn NumPy on August 14, 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.*