For a measly $2 this app is completely worth it. You can formulate recipes, which give you complete breakdowns (ibus, Gravity, volumes, etc). Not to mention, there are built in timers for each step of the process. You can even send recipes to friends that load up in the app. Many people have complained about the recipes not saving, I havent had to run into this yet, but you should probably back up your recipes, maybe email them to yourself. I love this app, and my only regret is waiting so long to get it.