Apps Worth Paying For?

[ase]

Amazon tells me I have a credit in the bank. What apps are worth paying for? I have a Samsung Galaxy S4 and already paid for the pro version of Moon Plus Reader. The only thing I really want right now is a document app that shows MS Word tracked changes and comments. What else should I shop for?

Comments

[weyrlady]

Pros: it's smart, self-contained, and beautiful. It's a series of logic puzzles that incorporates Escher-esque imagery and a haunting, mournful story.

Cons: it's too short and there's nothing else like it.