This app comes in two versions — EVA and EVAN. You might assume that one talks in a female voice and the other, male — nope, you have to install third-party voice packs separately for that. The difference is the image, a woman or a man, to represent the assistant. Each is $8.99, the free versions (EVA Intern and EVAN Intern) come with ad banners.
You can tell EVA / EVAN to manage your calendar, tweet, update Facebook, do Web searches, and more. You essentially have to give it your orders in a fairly straightforward manner. EVA / EVAN couldn’t tell me the current outside temperature in my city, but gave me a canned philosophical answer to “what is the meaning of life?”