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App icon sizes

1024 × 1024 1:1

JPG or PNG

No transparency, no rounded corners — iOS applies the mask itself.

1024 × 1024

Drop an image to check it Optional — the spec is above either way. Nothing is uploaded.

Cropped in your browser · your image is never uploaded

Local · adaptive icons keep only the central 66%

Design one master at 1024 × 1024 and export from it. iOS wants a square with no transparency and applies its own rounded mask; Google Play wants a 512 PNG with alpha.

How to use the app icon sizes

1 Read the dimensions above. That is the whole answer if the spec is all you came for.

2 Drop your own image in to check it against the spec — size, aspect ratio and file weight are each checked separately.

3 Turn on the safe zone to see what gets cropped or covered, then download the cropped version at the exact size.

Android adaptive icons are the part that catches people. The launcher applies a mask that varies by device — circle, squircle, rounded square, teardrop — and only the central 66 percent of the canvas is guaranteed to survive it. So an adaptive icon has to be designed with a generous margin, with the outer quarter treated as bleed rather than as content. iOS is stricter in a different way: submitting an icon with rounded corners already applied gives you a double-rounded result, and transparency is rejected outright at submission.

Questions

What size should an app icon be? −

Design at 1024 × 1024 and export what each store needs. iOS takes the 1024 directly; Google Play wants 512.

Should I round the corners myself? +

Can an iOS icon have transparency? +

What is an adaptive icon? +

Why does my Android icon look cropped? +

Sources

Apple — human interface guidelines, app icons Android developers — adaptive icons

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