The best alternatives to Ionic Sketch UI Kit are Shape Factory, lstore.graphic, and Brand.ai. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Ionic Sketch UI Kit?
AssemblyAI— Speech-to-Text API with superhuman accuracy
Velvet UI Kit an allusion to the possibility to combine to create new work. Is high quality pack based on simple and clean design, includes 70+ iOS screen templates designed in Sketch, most popular categories (Sign In / Sign Up, Walkthroughs, Menu, E-commerce, Profile, Social, etc).
Prime is the Premium UI Framework for Sketch that speeds up Design System creation. It helps to maintain consitency and design with the industry best practices.