ChaCha is mostly for use by mobile phones - it's kinda a "will you google this for me and get me the answer" service when you aren't at a computer, but can send

ChaCha is mostly for use by mobile phones - it's kinda a "will you google this for me and get me the answer" service when you aren't at a computer, but can send a text message. In that case, it doesn't require any signup and can be useful enough.