Just Tune It - Chromatic Tuner for iOS

The simplest and the most minimalistic tuner out there. Tunes anything, using your phone's internal microphone.

Reviews:

"Too easy for me.. Don't need it anyway, I use my eyes to tune my guitar" - Chuck Norris

"Wait.. Where are the fancy useless knobs and buttons?" - Random Computer Geek

"It comes in black. I approve" - Batman

"Too big for me" - Ant Man

"SMASH GUITAR TUNERSKVASJR@$*FHSCA" - The Hulk

NOTE: In order for this app to work properly, please click "OK" when the device asks you for permission to use the microphone the first time you open the app. In case you mess up, go to Settings > Privacy > Microphone and enable it there.