If you use Facebook, you have probably used or at least seen the Graffiti app, which makes it possible to send doodles to your friends. But did you know that there are actually two different Graffiti apps? One wildly popular (5,713,050 users and counting) and another more obscure one (mere 11,367 users). Surely the one with less users is just a clone? No, according to the creators, the more obscure one came first.
I remember installing the more popular one and instantly writing graffiti to my friends, which was kind of fun for a while. Out of curiosity I installed the more obscure one as well, but the thing is that I can't figure out how to use it. It keeps showing error messages. The lesson here of course is that it doesn't matter how cool your idea is -- if it doesn't work or the users can't figure it out (which amounts to the same thing) then it will never be popular.
The creators of the original graffiti must be kicking themselves now...
