Comparison

C Notebook vs PeterJohn NumPy Matplotlib

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

C Notebook

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
Read full description

This is a notebook that integrates code and note functions. At present, the notebook supports C language writing and local debugging and running, and a series of excellent debugging methods are specially designed for the notebook: for example, during the running process, you can see the value of the variable at any time, and you can also change it at runtime The value of the variable, and even you can display the change trend of the variable value as a graph, which allows you to use C language to quickly simulate the classic probability theory experiment, and witness the convergence process of the variable value with your own eyes, which is much clearer than using text to output the variable value . If you encounter a bug, you don't need to set any breakpoints, you can directly execute the code line by line at a slow speed, and combine real-time variable values and variable trend charts to analyze what is different from what you imagined. Of course, the code editor won't let you down either. Supports syntax highlighting, syntax hints and very smart auto-completion and code formatting. Although the code is embedded in the note, you can still complete a piece of code by abbreviating very easily. The notes support the Markdown format. If you are a Markdown expert, you should be able to edit beautiful layouts very easily, and if you are a novice, you can also write notes elegantly. iPad, iPhone and Mac can be seamlessly connected through the cloud synchronization function, and you can view, edit and run your code anywhere. Of course, if you encounter any problems or any suggestions, please feel free to contact us. Our email is feedback@forgetive.org, welcome and adopt your opinions at any time! ------ In-App Subscription Information ------- C Notebook Premium (Auto-Renew Subscription) When purchasing a subscription, if you log in to the online account in the app, the subscription will be bound to the online account, and you can use the online function benefits of the subscription. If you did not log in to the in-app account when purchasing, you can only use the local functions of the subscription benefits. You can register or log in to the in-app account at any time during the subscription validity period, and the App will ask you whether to bind the subscription to the account. Payment will be debited from your iTunes account immediately after confirmation of purchase. Subscriptions may be managed and auto-renewal may be turned off by going to your Account Settings after purchase. If you start a free trial, you need to cancel the subscription at least 24 hours before the end of the trial period, otherwise the system will automatically charge you after the trial period ends. Your subscription will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period. After canceling your subscription, your subscription remains active until the end of the current subscription period. No refunds will be given for current subscriptions when auto-renew is disabled. If a free trial is offered, any unused portion of the free trial period will be forfeited when you purchase a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PeterJohn NumPy Matplotlib

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
Read full description

Now PeterJohn, a Python Interpreter which Runs on iPhone,   Acquired Two Major Modules, NumPy and Matplotlib. they will help you to study  DataScience, DeepLearning, ReinforcementLearning. it's like King Jesus sent twelve disciples out two by two. **Mark 6:7;12-13, GNT 6:7 He called the twelve disciples together and sent them out two by two. He gave them authority over the evil spirits. 6:12 So they went out and preached that people should turn away from their sins.  6:13 They drove out many demons, and rubbed olive oil on many sick people and healed them. **** How to Use it; 1) First, Touch "Add Tutorial" at the BottomLeft of ProjectsView. 2) Touch "TutorialSeason006" at ProjectsView. 3) Choose One of Four at ScriptsView. s001PILimageFontTest.py; This doesNot use Matplotlib but uses only Matplotlib TTF(TrueTypeFonts). s002matplotlibPltPlot.py s003matplotlibPltLegend.py s004BarChartOnPolarAxis.py 4) Touch "RunScript" at the TopRight of EditScriptView. 5) Only for the first time, the warning that "AppleMetal Cache Directory doesNot Exist" appears, Once needs to go back to EditScriptView, and then touch "RunScript" at the TopRight of EditScriptView Again. 6) the script is Executed at RunScriptView. **** Enjoy NumPy, Enjoy Matplotlib Enjoy DataScience, DeepLearing, ReinforcementLearing. Enjoy PeterJohnNumPyMatplotlib --Yasushi Yassun Obata

Screenshots

C Notebook4 screens
PeterJohn NumPy Matplotlib4 screens

Verdict

The call

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 chart position (#200 vs unranked). PeterJohn NumPy Matplotlib's advantage is in-app purchases (none vs 1). On update cadence, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

C Notebook ships an update fortnightly, PeterJohn NumPy Matplotlib every 2 weeks. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

Scorecard6 real differences · 5 level
C Notebook versus PeterJohn NumPy Matplotlib: the parameters behind the verdict, then further details
ParameterC NotebookPeterJohn NumPy Matplotlib
Price$0.99 — better$12.99
Rating5.0 (1 ratings) — better—
Positive reviews75.0% of reviews — better0.0% of reviews
Number of ratings1 — better—
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank#200 — better—
DevicesiPhone, iPad, iPod, Mac, Vision Pro — betteriPhone, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size32 MB222 MB
Age rating4+4+
Developer铖 邢Yasushi Obata

Customer experience

C Notebook

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews16 reviews
Positive75.0%
Neutral6.3%
Negative18.8%

PeterJohn NumPy Matplotlib

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

1 purchases

C Notebook

Subscriptions1
  • C Notebook Premium3 Days trial$0.991 Month
None

PeterJohn NumPy Matplotlib

No in-app purchases

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 9, 2026 and PeterJohn NumPy Matplotlib on September 20, 2026.

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