iOS
- 57 px, iPhone
- 72 px, iPad
- 114 px, iPhone 4 Retina Display
- 512 px, iTunes – Used in iTunes and in the App Store sized down to 175px
- 29 px, iPhone Settings/Spotlight, iPad Settings – used in these table views. Minor, but still important!
- 48 px, iPad Spotlight
- 58 px, iPhone 4 Settings/Spotlight
- 64 px document icon
- 320 px document icon
The definitive guidelines from Apple
More info: http://mrgan.tumblr.com/post/708404794/ios-app-icon-sizes
Android
- 96px (xhdpi)
- 72px (hdpi)
- 48px (mdpi)
- 36px (ldpi)
- 512x512 pixel - only used in Android Market; resized to various sizes
More info: http://developer.android.com/guide/practices/ui_guidelines/icon_design_launcher.html
BlackBerry
- tablet webworks: 90px
- applications for all form factors can accept two images for the icon: a regular icon and a hover icon, which is displayed when the user hovers over the app with the cursor.
- BlackBerry 6: "For application icons, create an icon file that does not exceed 68-by-68 pixels. This size includes the canvas. Keep the weight of icons inside a 49-by-49 pixels space. Smaller elements can extend beyond this size but icons should not exceed 55-by-55 pixels. If the icon within the canvas exceeds this size, it could be scaled down and upset the line weights and gradients."
http://docs.blackberry.com/en/developers/deliverables/17965/BlackBerry_6_icons_and_indicators_1152025_11.jsp
http://docs.blackberry.com/en/developers/deliverables/20770/Application_icons_834662_11.jsp has info about "defaults" - the BBW packager will look for icon.gif, icon.png, and icon.jpg in the root of the app package by default, or go for what's specified in config.xml.
webOS
Windows Phone
- Small Application Tile: 62x62 px
- Large Application Tile: 173x173 px
- Application Bar Icons: 48x48 px
- Windows Phone Marketplace
- Small Mobile App Icon: 99x99 px
- Large Mobile App Icon: 173x173 px
- PC App Title Icon: 200x200 px
- Details Page Screenshot: 480x800 px
- Panorama Background: 1000x800 px
- Application Splash Screen: 480x800 px
More information
