iPhone Calculator

Day 4 of the Daily UI challenge. Calculators. I've always loved minimalistic design when it comes to these kinds of tools. We understand how it works and where to press due to the "training" we have done over time. Repetition. Our brain can take what it has already mastered, and apply it to a new device, when recognizing its properties, e.g. a calculator. Gotta love UX. This one was made with Adobe Illustrator.