I'm the last person to give a low score for a simple GUI wrapper, but in this case I agree that this GUI just doesn't cut it. What *would* be useful is a clever pull-down menu of grep expressions, or an assistant. I'm thinking here of PageSpinner (an HTML editor) which does not require knowledge of HTML to use. And it's excellent. So I'd urge the author of this to ask the following question: who's going to use grep? Presumably, someone who already knows it exists. They can only do that through knowing about UNIX, or through BBEdit and equivalent. So what such a person is most likely to need is not the means for using grep (BBEdit Lite, no longer supported, was *free* and still widely available) but a means for remembering and applying all the myriad different expressions and their syntax. Do something like that, and I'd pay $20, not $10!