I recently accuired Sketch, which is a fantastic tool for design. Being a user of Illustrator and Photoshop, Sketch felt really comfortable to use. Sketch isn't without is quirks but it's a lovely way to design and will be my go to over Illustrator. To get a better understanding of Sketch and its features I decided to best mimic Apple's Calculator App. It's a pretty simple design that utilizes Helvetica Neue - Light. I have included a download below the image.