Shipping an app means producing the same icon at two dozen exact pixel sizes, in folders named precisely how Xcode and Android Studio expect. Upload one square image and get the whole set back, organised and ready to drop straight into your project.
One image in, every iOS, Android and web icon size out, as a ZIP.
Square and at least 1024x1024. Smaller images still work but the largest icons will be upscaled and look soft — and the App Store icon is the one reviewers see first.
Every iOS AppIcon size, all five Android mipmap densities plus the 512px Play Store icon, and web favicons including the 180px Apple touch icon and 192/512 PWA icons.