It used to be that, to do nerd stuff, you had to get a Mac or PC. As iOS progressed over the years, however, developers saw that users were spending a lot of time trying to do work on their iPhones and iPads, and started building utilities that packed powerful functionalities in what looked like “just an app”. We got Drafts and Launch Center Pro, calendar apps and password managers just as powerful as their desktop counterparts, and, of course, apps to script iOS and a text editor with its own workflow system. To sum up: iOS is still maturing, but there's no shortage of nerdy apps and utilities at this point.
iOS is great for quick text entry thanks to the portability of an iPhone or iPad mini, but doing advanced text manipulation is a bit tricky unless you want to get dirty with Editorial and Python scripts. On the Mac, it's easy to fire up Automator and create a workflow that takes a line of text and turns it Into Title Case or UPPERCASE; even going the extra mile and building services to take selected text and indent it or swap spaces with tabs takes a few minutes, but it's doable with a basic knowledge of built-in OS X tools. On iOS? There's no Automator (yet?), so, until today, if you wanted to do automated text transformations you'd have to get Editorial and Pythonista or use some of Launch Center Pro's (limited) text filters.
Craig Pearlman noticed this problem and built TextTool, a $4.99 Universal app that comes with 28 built-in text transformations that you can use inside the app's text editor or chain to other iOS apps with URL schemes and workflows.