It takes a lot for me to spend money on an iPhone app. I sunk $4 into Candy Crush that I will never get back. I only downloaded A Beautiful Mess because I rationalized that it was an investment for the blog. Today, I shelled out an unprecedented $3 for the Waterlogue app, to turn my photos into works of art. I think that this is going to be the start of a wonderful friendship. Do you have any apps that you swear by, particularly for photo editing? Have I opened the flood gates of purchases? Let me know in the comments!