Easy icons for iOS, OSX and Android You can build from a single large file - or provide multiple files and let Icon Tool fill in the gaps. - iOS (XCAsset) - iMessage (XCAsset) - OSX (XCAsset or .icns file*) - Android It's simple, it's powerful, it will save you time - What's not to like? * Saving an icns file relies on iconutil which should be installed at /usr/bin/iconutil. If it isn't present, then installing XCode and clicking on 'Install command line tools' should install it for you.