Hiogi is a free mobile question and answer service. Registered members can send questions via
Twitter SMS, WAP or mobile internet,
iPhone or
iPod touch or email and wait for the community to reply with an answer. If two members give conflicting answers to a question, they enter into an 8-minute "battle" which is ultimately decided by a third Hiogi member. Answers are rated for relevance. Members are awarded coins for correctly answering other users' questions as well as for maintaining accounts and inviting friends; at the end of the month each coin entitles the user to one chance to win a prize.
[Hiogi: FAQ]