I don't see the need for NDAs unless his idea is patentable. If this is in the consumer space, that NDA would likely not amount for anything. If you read enoug

I don't see the need for NDAs unless his idea is patentable. If this is in the consumer space, that NDA would likely not amount for anything. If you read enough startups, you'd know that the success of startups do not depend on the idea but on the founders. With the situation you are in right now, you and your friend would probably not work well together.