Its an Instagram "Viewer" for Mac

To be clear, this app enables you to view yours and others Instagram feeds, it does NOT enable you to make Instagram-styled images from your own photos to be added to Instagram. I bought the app thinking it was a Mac version of Instagram - it is not. But for what it does, which is viewing Instagram feeds, it does very well. I support the Developers efforts, I just should have done a better job of reading (and understanding) the apps description.

kev_tv about Instamac, v1.0