TX RegEx Tester is a convenient tool to test regular expression(VS style) on your iPhone. Also, it will be useful to find text based on a certain pattern defined by regular expressions.
TX RegEx Tester uses your network connection to provide this feature. It may support Perl/Unix style regular expression in the next version.
Just type or paste your regular expression in the top-most text field and the text to be tested below, then touch the action button to get the result. Use "()" pairs to set the groups.