21Q+Trivia app for iPhone and iPad

Like the standard 20 questions game but with some key differences:
1. You can create your own categories
2. You can add/delete questions
3. You can add/delete guesses
4. You can research/change answers
5. If not guessed, you get a full explanation of why

As in the 20 questions game, you think of something or someone and answer questions until either guessed or there are no more questions. Unlike 20 questions, you can compare your answers against the expected answers.

To make things more fun, you can create your own categories. Create a category of people you know, play 20 questions until you have entered everyone. Then let a friend play. See if who they are thinking can be guessed with your questions and their answers.

Excellent for studying. Contains a powerful differences engine that can be used to categorize people, places, or things. Once categorized, answer questions from 20 questions to confirm your understanding.

Also contains a trivia game. The trivia game uses the questions and answers from 20 questions to build trivia questions. Each trivia question has three parts with three possible answers. Great for studying.

Play to learn or just for fun!