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
    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.

    Charter ( is a Mac software application that has been discovered and submitted by users of

    Operating System: Mac

    Default Install Path: /Applications/

    Minimum OS version: 10.6