Dont buy!
I rarely ever review anything, but this app is so bad that I have to. I downloaded it expecting to find a large amount of paintings, at decent resolution, with some info. Lets take Basquiat for example: I used their clunky interface, that basically has you select artists by browsing for files (like in finder), to find Basquiat. Being a very popular artist I figured hed have a lot of paintings. There were 17. One painting was repeated three times, then two others were repeated twice. So there really wasnt 17. They are extremely low-res, some maybe 300px. As for the info, it will just take you to the artists wikipedia page in safari. I recall one image not even being a painting but the logo from artnet. Another example is Jeff Koons. The only work of his that they have is directly from his official site. Dont buy. Absolutely not worth $9.99.
Tietjen. about Art Authority for Mac