Apps similar to Guessless include Akinator, which has a free version. Other options are 20 Questions. Between them they cover iPhone, the web, iPad and Android.
Akinator the Genius can read your mind and tell you who you're thinking of by answering a few questions.
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20Q is an object, a website, a company, and a phenomenon. It first gained popularity as an online game (20Q.net) where users log onto the website and play against an artificial intelligence (A.I.) foe. Players think of an animal, vegetable, mineral, or other object and 20Q...
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