I like the convenience it offers for code snippets in your pocket. Currently it offers in so purchase for more advance snippets. I could like a beginner package covering the top 25 or so methods starting out. Yes fizz buzz is nice but perhaps another category the has building blocks down the screen. All else considered it's a nice tool to keep me thinking as I am still relatively new to programming.

Why would you choose one of the hardest languages to have people study in? Almost all top professionals in this field recommend learning interview problems in easy languages such as Python or Java. Port it to those languages then maybe people would want to use it. Good idea, but please take this advice. I do have to say it is a smooth app. Loads fast and smooth.

Some solutions (for example, find the second largest value in a BTS) are clearly incorrect. The app also only offers a handful of pretty random problems for each section. Great concept but needs more work to be useful in any way.

So far so good. C is not my strong language but I can still follow along easily. The external links to stack overflow are great when the solution isn't clear.