3 Quick iOS UI hacks that you can learn in 5 minutes and will help you forever.
First we need to understand what is aspect ratio? Aspect ratio is the ratio of the width to the height of a screen.
If we observe above images, iPhone 5S, iPhone 6, iPhone 6Plus and Android (HD screens) have same aspect ratio i.e 9:16. So we can design only by maintaining aspect ratio 9:16 for the screens we are building instead of making different designing for different screens. Andrew Hedge aspect ratio calculator is really handy to calculate sizes.
Color Palette Generator
First choose your main color for theme. (Tip: Choose flat colors.) My hack to choose flat UI color from https://flatuicolors.com/ Now, How to Generate color shades, tones and tints values and generate color palette? My hack to generate color palette. http://colllor.com/ Go to above link and in pick color fields, Pick your color. You will get shades/tints, tones, mix colors, and similar color. Some color palette examples:
Typography & Font size
iPhone uses Helvetica font and android uses Roboto. iPhone render fonts in points. Now, When you make a design in Adobe Photoshop, one is used to have fonts in pixels. So how to convert pixels to points? If you are designing for retina display then 12 points in Photoshop is equal to 6 Points in iOS and for non retina 12 points in Photoshop will be 12 points in iOS My hack to convert pixels to points Go to Angry Tools and on the left side click on pixels first. Then on the right side in the text field enter font size which is in pixels. It will automatically convert font size from pixels to points for iOS and DP (Density pixel Independent) for Android.