Okay

The app is a good idea, but it needs major improvements. Like for the crafting guide, it should be categorized by mod. I do not recommend buying this app as it should be free unless major improvements are made. And also your crafting guide is just a compilation of different Tekkit Wiki pages. So really, I could have been getting the recipes for free off of Wiki.

Vince A. about Pocket Edition Guides for Mods & Maps for Minecraft