All of the components, layouts and typography are made according to Apple's Human Interface Guidelines. The naming convention of each component strictly follows Apple Developer Documentation so you can get familiar with it when you implement your designs in Xcode.
Elements is a free iOS UI kit brought to you by Sketch and contains:
Five different themes:
and more than 175 Symbols.
Fludish Sketch UI Kit is high quality pack based on fluent design system, includes 50+ iOS screen templates designed in Sketch, 9 most popular categories (Sign In / Sign Up, Walkthroughs, Menu, E-commerce, Profile, Media, Statistics, Messages, Social)