It's an app. If you want a full-on brewing program iBrewMaster is very good. It's pricey but it has recipe design, batch tracking and everything else you can imagine.
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger