Create a layout that fits the screen of an iOS device.
Users should see primary content without zooming or scrolling horizontally.
Use UI elements that are designed for touch gestures
to make interaction with your app feel easy and natural.
Create controls that measure at least 44 points x 44 points
so they can be accurately tapped with a finger.
Text should be at least 11 points so it's legible
at a typical viewing distance without zooming.
Make sure there is ample contrast between the font color
and the background so text is legible.
Don't let text overlap. Improve legibility by
increasing line height or letter spacing.
Provide high-resolution (@2x) versions of all image assets.
Images that are not @2x will appear blurry on the Retina display.
Always display images at their intended aspect ratio
to avoid distortion.
Create an easy-to-read layout that puts controls
close to the content they modify.
Align text, images, and buttons to show users
how information is related.