If you want to develop a Prolog program, then the best tool to use is X-Prolog. This is an integrated development environment that makes the development of Prolog programs easier. With X-Prolog, you can edit your source files with various tools, build your programs with different options, and export them in different runnable forms.

If you are a beginner in the world of Prolog, then the best thing to do is to download the app, install it on your device, and start using it. If you want to learn more about the app, then just go through the tutorial and start using it.

In order to make your development process more efficient, you can configure the app to use a specific tool. This way, you can select the tool and configure its settings, and you will be able to use it without having to edit your source files manually.