Montana Flies-2-Tie is a great little app for fly fisherman and fly tiers alike. It includes pictures and descriptions of a wide variety of dry flies, nymphs, and emergers, specifically targeted for the Madison River in Montana and Yellowstone Country. So, if youre planning a fishing trip to that area, tie some of these guys up, or buy them from Blue Ribbon Flies in West Yellowstone, Montana, and your fish-catching prospects just got a whole lot better. The App includes information on when and how to use each fly, the materials needed to tie it, and a link to a quality video for tying it successfully. Hope you enjoy it!