I bought the app too and I'm more or less satisfied. Ultimately, I'd like to be able to buy Beersmith for the iphone with the ability to transfer recipes back and forth, but this one has a lot of useful tools. It does unit conversion, mash temp calculatoin, SRM, IBU, carb pressure calculation, attenuation, sg calculation, refractometer (I don't have one, so I didn't check this part out), pitching rate calculator, nutrition calculator, and evaporation calculator. I really like all of these tools as they are in Beersmith, but it just isn't as convenient to carry my laptop around with me all the time. I'm thinking I'm going to get a lot of use out of this one.