I have Beersmith on my desktop, but on my phone and tablet I have iBrewmaster. I find I use iBrewmaster almost exclusively now. Highly recommended. The developers are very active with updating the app with new features, ingredients, etc.
Keg: Rye Saison, Belgian Golden Strong, DIPA, Citra IPA, English Barleywine aged on rum/oak, ESB, Vienna-fest, American-Oatmeal Stout
Secondary: Oud Bruin/Dark Sour, Rye Saison w/ Brett., Belgian Dark Strong, American Barleywine
Primary: Black Rye DIPA, Vermont IPA
On Deck: ESB, RIS, DIPA, German Pils