Reg-Exp Tester is a free Android application developed by Ruud Jansen, categorized as a utility and tool. This app is designed to test regular expressions and is perfect for developers, programmers, and anyone who needs to work with regular expressions.

With Reg-Exp Tester, you can enter a regular expression and a text to match on, and the app will output the amount of regex matches. The matches are also color-coded for easy identification. Additionally, the app has a second screen with a quick reference guide in case you forget the regular expression basics.

Overall, Reg-Exp Tester is a handy tool for anyone who needs to work with regular expressions. It is easy to use, free, and provides accurate results. Give it a try and see how it can simplify your regular expression testing process.