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Editorial Team
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Asked: 2026-06-14T08:39:53+00:00

Is it free? It looks like on the website it says Try Now ,

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  1. Is it free? It looks like on the website it says “Try Now”, which makes me worry that it just gives you a demo.

  2. Do you have to pay the Qt company anything to distribute a program using Qt, or can you just throw it (the program) out there and just say you used Qt.

  3. Is it native C++, or something weird, like, the same way .NET programs aren’t actual C++, they just look like it.

  4. Would somebody who uses my program have to install the Qt framework before they can run it, or will the program run without any installation?

  5. Can it easily be compiled to work on a Windows, Linux and Mac OS?

P.S.: Pretty sure this question relates to: “software tools commonly used by programmers”, I don’t see why there are all the dislikes and having the question closed. (Tough crowd)

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1 Answer

  1. Editorial Team

    Is it free? It looks like on the website it says “Try Now”, which
    makes me worry that it just gives you a demo.

    It’s LGPL so free-speech and free-beer. You have to release any changes to Qt itself but you can use it for free in your commercial apps. You can buy a commercial license which gives you better support and the right to keep any modifications or additions to the library to yourself.

    Is it native c++, or something weird, like, the same way .NET programs
    aren’t actual c++, they just look like it.

    It is c++, there is an extra pre-compile step which generates native C++ code for the GUI and for some special features (signal/slots). For historic reasons it contains its own version of lots of c++ that is now standard (eg. its own equivalent of STL and it’s own threading) but you are free to mix STL/boost/Qt types as you wish. It works with any regular c++ compiler.

    Would somebody who uses my program have to install the QT framework
    before they can run it, or will the program run without any
    installation?

    You need to include the Qt shared libraries (dll/so) that you use, along with your apps.
    On linux you can use the system Qt libs, on windows it’s trickier to mix dlls across compilers.

    Can it easily be compiled to work on a Windows, Linux and Mac OS?

    It’s easy to build, configure --a list of options for stuff you want or you can download compiled binaries for all platforms.

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