Apple's App Store rejects submissions with missing or incorrectly sized icons more often than almost any other asset issue. Unlike Android, iOS requires a large, specific set of sizes for different contexts — Settings, Spotlight search, Notifications, the Home Screen, and the App Store listing itself.
Here's every size you need, and a free tool that generates all of them at once.
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Required iOS Icon Sizes
| Usage | Size (px @1x equivalent) | Notes |
|---|---|---|
| App Store | 1024×1024 | No transparency, no rounded corners (Apple applies the mask) |
| Home Screen (iPhone) | 60, 120, 180 | @1x, @2x, @3x |
| Home Screen (iPad) | 76, 152, 167 | @1x, @2x for standard, @2x for iPad Pro |
| Spotlight Search | 40, 80, 87 | @1x, @2x, @3x |
| Settings | 29, 58, 87 | @1x, @2x, @3x |
| Notifications | 20, 40, 60 | @1x, @2x, @3x |
In practice, the unique pixel sizes you need are: 20, 29, 40, 58, 60, 76, 80, 87, 120, 152, 167, 180, and 1024 — exactly the set the GMC Tools App Icon Generator produces.
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The 1024×1024 App Store Icon — Special Rules
The App Store icon has stricter rules than the others:
When using the GMC Tools generator, uncheck "Transparent" and pick a solid background color before generating, so your 1024px App Store icon comes out fully opaque and ready for App Store Connect.
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Xcode Asset Catalog Setup
Once you have your 13 PNG files:
Assets.xcassetsAppIcon image setIf you're using a tool like fastlane or a Contents.json-based asset pipeline, the same 13 files map directly to the standard iOS AppIcon.appiconset slots.
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Generating the Full Set
icon-20.png through icon-1024-app-store.png---
Frequently Asked Questions
Why does my App Store submission keep getting rejected for the icon?
The most common causes are transparency/alpha channels in the 1024px icon, or a pre-rounded icon (Apple rounds it automatically — submitting an already-rounded icon looks wrong).
Do I need to design 13 separate icons?
No — design one high-resolution square icon (1024×1024px) and resize it down. Apple's guidelines recommend the same visual design across all sizes, just scaled.
What about iPad-specific sizes?
The 76px and 152px sizes cover standard iPad Home Screen icons, and 167px covers iPad Pro — all included in the GMC Tools iOS export.
Can I use a PNG with rounded corners already applied?
Don't — for the 1024px App Store icon, submit a square image with sharp corners. iOS and the App Store apply the corner radius mask automatically across all platforms.