it also shows that an icon has to be iconic to work. play, fast forward and rewind, the camera and the calculator, i knew. airplane mode, wifi and bluetooth, i knew but could easily imagine people confused by. the crescent moon, the lock with the arrow around it, the flashlight and the dial i honestly didn't know, and would've had to tap them to try to figure out what they did.

you can't just make any picture iconic, it's not something an app can force.