This is the main window of The Regex Coach that allows you to access all the functions of the application. 

The Regex Coach will also allow you to insert a text file for checking and you can save the result using the file menu. 

In the info tab The Regex Coach will display the detailed information about the regular expression you enter. 

Here you can see how The Regex Coach splits the regular expression in the constituant parts. 

This window of The Regex Coach will enable you to compare the regular expression with the target string you inserted.