Dribbble - Convert on iOS 7 by Jesse Auciello
004 Calculator by Jaroslav Getman
Really crude and quick animation to help visualise the transition between selected/unselected cells. I clubbed together 6 screens in Photoshop to create this, I know it's not polished particularly ;)
This calculator looks like a stealth fighter!
ViClean Remote by Something Design Studio
Full calculator ui
Daily UI - Day 4: Calculator by Mike DelGuidice
Daily UI #004 - Calculator by Tom Koszyk