How to Create App Icons for iOS and Android

Shipping an app or a PWA means producing the icon in a small forest of sizes — iOS wants one set, Android another, and your web manifest a couple more. Resizing each by hand is tedious and easy to get wrong. An app-icon generator turns a single square image into every size at once.

Why app icons are such a chore

Each platform expects the icon at several pixel dimensions so it looks crisp on every device — phones, tablets, notification badges, settings screens, and store listings. Miss a size or supply a blurry one and your app looks unpolished before anyone even opens it.

What each platform needs

Step-by-step: generate app icons with ToolsGravity

1. Open the App Icon Generator and upload a large square image (1024×1024 is ideal).
2. Generate the icon set — every required size is produced from your source.
3. Download the pack and drop the icons into your app project or manifest.

Design tips for a great app icon

• Start at 1024×1024. Always scale down from a large source — upscaling a small icon looks soft.
• Keep it simple and centred. A bold, single-focus mark reads at 48px; detailed artwork turns to mush.
• Mind the safe area. Android adaptive icons crop to circles and rounded squares — keep important content away from the edges.
• No transparency for iOS. iOS icons are opaque squares (the OS rounds the corners), so fill the background.
• Also need a favicon? Generate one from the same art with the Favicon Generator.

Summary

App icons are a small task that eats a lot of time if you do it by hand. Start from a large, simple, centred square, and let the ToolsGravity App Icon Generator produce every iOS, Android, and web size in one go — right in your browser.