If you follow me on Twitter, you'll already know this, but I'm now developing a regular expression app for iOS!
It's called "Pretty Regular Expressions", and I'm going for a minimal approach, but with some optional settings, and a clean interface. Of course a dark theme was the first thing I built!
It's still in development, but it's moving pretty fast, so an open beta is very imminent. I already have a landing page, where you can subscribe to keep updated with the application. Of course I will only send out an email for when the beta opens, and then when the app is released.
If you want to watch the progress of the development, then just follow me on Twitter at @chrishannah, because I post a lot of screenshots.