I really like this idea! However, I think the value of this really lies in building a community of users that share their drawings. That's what makes instagram

I really like this idea! However, I think the value of this really lies in building a community of users that share their drawings. That's what makes instagram really great and "sticky". I think putting a $1.99 barrier to entry into the ecosystem could be detrimental to the growth you would need for this to take off.