ChemAppPy v. 1.0.0 Released!

It is with great excitement that Ex Mente announces the official release of ChemAppPy version 1.0.0 for Windows and Linux. The Light version of ChemAppPy is freely available on our website.

For any information on the commercial version of ChemAppPy, ChemAppPy Development, please contact us on

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ChemAppPy upcoming release!

Ex Mente Technologies and GTT-Technologies are excited to announce the first commercial release of ChemAppPy in January 2019!

ChemAppPy is a Python package that makes ChemApp, the thermochemistry library developed by GTT-Technologies, available in Python. It also includes powerful tools that make thermochemical calculations easier and quicker to do.

GTT is the original developers of ChemApp, a powerful thermochemistry tool that can be integrated into applications through a C or Fortran interface. Ex Mente has been using ChemAppPy for many years with great success. We used ChemApp with the C programming language, which had its drawbacks. We are engineers, not computer scientists, and each time we had to return to the C world, it felt like starting from all over. It was difficult for us to use, and took a long time. As engineers, we were way too lazy to keep doing that. There had to be a more effective way.

In 2013 we discovered the Python programming language and simply fell in love with it. It is so much friendlier, easier, and faster to use than C. We did lots of things in Python, and it worked really well. Eventually, we decided to bring our good friend ChemApp into the Python world. That is how ChemAppPy was born.

You can use the ChemAppPy basic module to do all the same things that ChemApp can do through the familiar tq interface, with functions like tqini, tqsetc, and tqce. With the friendly module, you can do all these same things, but the functions have friendlier names, like ThermochemicalSystem.load (to open a data file), and EquilibriumCalculation.calculate_eq to perform equilibrium calculation. We like this because it is easier to learn and remember. The basic and friendly modules do not really add much to what ChemApp provides, just making these calculations available in Python.

The ChemAppPy tools module is different. Here we added some new stuff … again because we are lazy engineers. We like doing lots of work, but quickly and easily. The tools help you with setting up large sets of calculations, running them, and making beautiful plots that help us understand things better, which is great. Now we can automate an entire thermochemical study, and rerun it with different parameters whenever we need to.

In January 2019 we are releasing the first commercial version of ChemAppPy, version 1.0. Now you can have as much fun as we do with thermochemistry and Python. The software is developed and supported by Ex Mente Technologies, and distributed in Japan by RCCM and worldwide by both Ex Mente and GTT.

If you are interested to learn more about ChemAppPy, you are welcome to contact us at or (+27) 12 348 2438.

Looking forward to hear from you!

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