There is only 1 image for you to play with - the app description talks about multiple examples for you to play with, but it is the same image with different simulated lighting scenarios. Also every time you snap a “picture” the app makes a shutter sound, even if you have your phone volume off. Great idea for an app and I want to like it, but it is severely lacking currently.

Very helpful for beginners like me

It was cool for about 5 minutes. That's how long it took me to find out that if I use the exact same camera settings on EVERY shot I get a "good shot" but if I change them on any example it is off. They need to add a bunch more examples under a wide variety of lighting and motion situations and then it be awesome. Right now there are a bunch of examples of the EXACT same situation-- a little girl with a pinwheel swaying under overcast skies. The same settings work best for every example so it gets boring and useless fast.

I've been teaching photography for many years, and haven't had an active on-screen way to illustrate results - just have to predict what will happen. This permits my students to go home and test what the theory predicts, and do it free. Great help to save time in class with countless demos - they see for themselves. I wish it could feed VGA to my projector from my iPhone4, because I can't get on the 'Net in my classrooms.