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To download Charter from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By Paolo Bosetti

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Charter is an application that easily allows to add plotting functionality to every scripting and programming language with a UDP socket library.

The only thing you need is to send an UDP packet containing the data to be plotted, which has to be formatted following a custom yet simple protocol. One packet per point, multiple data series per packet: Charter automatically detects the series, sets up the charts, and shows you a nice scatter plot that can be updated in real time.

Charted can result handy whenever you have to chart some data from your code prototype, and you want to see the charts updated during your code execution, and not just at the end.

Possible intriguing applications are:

• realtime charting of web servers statistics
• convergence charts for numerical analysis, simulations, optimization softwares
• realtime charting of analog input signals from an Arduino or a similar prototyping platform

Currently, a client library for the ruby language is provided on More libraries for different languages will follow.

A more advanced, feature-rich, paid version is currently under development and will be released as CharterPro.

What's New in Version 1.3.1

Fixed bug on network operations: now Charter can get plot data from external addresses.

All the underlying frameworks have been updated to the latest revisions for improved performance.


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Customer Reviews

Seems to be incompatible with El Capitain

Although worked before, now does not load the app after upgrade. Is this a dead end app? Will Apple cleanse the App Store of the incompatible appos or flag those that are so old they are likely incompatible?

View in Mac App Store
  • Free
  • Category: Developer Tools
  • Updated:
  • Version: 1.3.1
  • Size: 18.0 MB
  • Language: English
  • Seller:

Compatibility: OS X 10.7 or later, 64-bit processor

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