Icon sizes for iPhone & iPad

I decided to recompile some information about the sizes and names of the icons we need when we create an App.

Review of Icon Sizes

Image	Description	iPhone	iPhone Retina Display	iPad	iPad Retina Display	iPhone5
Application Icon	Icon displayed on the device’s home screen, used to launch an application.	57x57	114x114	72x72	144x144	114x114
Settings Icon	Icon used to identity an application in the iOS Settings Application.	29x29	58x58	29x29	58x58	58x58
Spotlight Search (uses same image as Setttings on iPhone)	Icon used to identify an application in the Spotlight Search results.	29x29	58x58	50x50	100x100	58x58
iTunes Image	Large image used by iTunes during ad hoc distribution.	512x512	512x512	512x512	512x512	1024x1024
Launch Image	Image used as a placeholder screen while the application loads.	320x480	640x960	Portrait: 768x1004 Landscape: 1024x748	Portrait: 1536x2008 Landscape: 2048x1496	640x1136

iPhone Launch Images

Device Target	File Name	Size (in pixels)
iPhone 3GS	Default.png	320x480
iPhone 4	Default@2x.png	640x960
iPhone 5	Default-568h@2x.png	640x1136

iPad Launch Images

File Name	Size (in pixels)	Use
Default~ipad.png Default@2x~ipad.png	768x1004 1536x2008	This is the basic loading image that is used if a more specific image is not available. If no more specific images are supplied, this should be present.
Default-Portrait~ipad.png Default-Portrait@2x~ipad.png	768x1004 1536x2008	This is the generic portrait-loading image. This image is used for right side up (home button on bottom) portrait orientations and takes precedence over Default~ipad.png. Therefore, if you supply this image, Default~ipad.png is not used. Additionally, if Default-PortraitUpsideDown~ipad.png is not supplied, this image is used.
Default-Landscape~ipad.png Default-Landscape@2x~ipad.png	1024x748 2048x1496	This is the generic landscape-loading image. This image takes precedence over Default~ipad.png. Therefore, if you supply this image, Default~ipad.png is not used. Additionally, if Default-LandscapeLeft~ipad.png or Default-LandscapeRight~ipad.png is not supplied, this image is used.
Default-PortraitUpsideDown~ipad.png Default-PortraitUpsideDown@2x~ipad.png	768x1004 1536x2008	This is the portrait upside-down (home button on top) loading image.
Default-LandscapeLeft~ipad.png Default-LandscapeLeft@2x~ipad.png	1024x748 2048x1496	This is the landscape left (home button on left) loading image.
Default-LandscapeRight~ipad.png Default-LandscapeRight@2x~ipad.png	1024x748 2048x1496	This is the landscape-right (home button on right) loading image.

Newsstand Icons

The aspect ratio of all Newsstand icons should be between 1:2 and 2:1. In addition, all Newsstand icons must be flat and have 90° corners.

Description	iPhone 5	high-resolution iPhone	iPhone iPod touch	high-resolution iPad	iPad	Guidelines
App icon (required for all apps)	114 x 114	114 x 114	57 x 57	144 x 144	72 x 72	“App Icons”

UITabBarItem Icons

If your want to create an Icon for the UITabBarItem you must consider the next steps:

1. Image -> Mode -> Grayscale
2. "Discard color information" -> Discard
3. Mark all [cmd A]
4. Copy [cmd C]
5. Layer -> Layer Mask -> Reveal all
6. In "Chanels" (Window -> Chanels) show the "Layer 0 Mask" (click on the left)
7. Paste [cmd V]
8. Image -> Adjustment -> Invert [cmd I]
9. Save for web [cmd alt shift S] as PNG 24

using the Icon size of 30x30 pixels for iPhone and double for retina display 60x60 pixels.

In general, when you are supplying a retina image you should name it with [name]@2x~iphone.png or [name]@2x~ipad.png. Then, in the IB you should put the name of the file without the whole suffix, so just [name] instead of [name]@2x~iphone.png. The image won't show up in the IB, but should be ok in the live app.