Wolfram Alpha, the computational knowledge engine, released its own iPhone app. The thing is the cost is $49.99, and I am wondering if it is really worth the price. Well, you know, Wolfram Alpha itself is free, and you can access from Safari. ITMedia says that "it features better user interface, and a keyboard to type numbers in a original keypad". Well, there's always Google, but I guess some people want something that talks back to them in a real way...