App Icon Design Guidelines. In android, app icons are used in various sizes too and the largest is identical to ios: About the style and technical requirements. App shortcuts give users quick, easy access to up to four of your app’s actions.
When designing app icons for ios, i recommend to use the official app icon templates provided by apple. Combine an engaging design with an artistic interpretation of your app’s purpose that people can instantly understand.
Follow the official guidelines from google and apple, and check their resources from the human interfaces guidelines and the material design.
From use as app icons to website marks or favicons to divots that can be used in a logo or throughout a design project, the icon is a mark that’s here to stay. In the material design specification, google split information about android app icons into two sections: The next is an android app icon! This section describes some guidelines you should follow when creating visual assets for your app on google play.