The size and naming of all icons in an iOS project

General icon The following several:

icon.png–57x57 IPhone (IOS5/6)
[Email protected]–114x114 iPhone Retina (IOS5/6)
icon-72.png–72x72 IPad (IOS5/6)
[Email protected]-144x144 iPad Retina (IOS5/6)
[Email protected]-120x120 iphone & ipod Touch (IOS7/8)
[Email protected]-180x180 iphone6 Plus (iOS8)
icon-76.png-76x76 ipad2 & ipad Mini (IOS7/8)
[Email protected]-152x152 ipad retina (IOS7/8)

The following do not differentiate between iphone or ipad. Visible, in iOS6.1 and previous iOS versions, the ipad and iphone users have a completely different icon. But IOS7 and later, there is no longer a distinction between the two.

iOS7 to iOS8 previously required icon size and name

Image Size (px)	File Name	Used for	APP Store	Ad Hoc
512x512	Itunesartwork	APP list in ITunes	Do not include	Optional but recommended
1024x1024	[Email protected]	APP list in iTunes for devices with Retina display	Do not include	Optional but recommended
120x120	[Email protected]	Home screen on Iphone/ipod Touch with Retina display	Required	Required
76x76	Icon-76.png	Home Screen on IPad	Required	Required
152x152	[Email protected]	Home screen on IPad with Retina display	Optional but recommended	Optional but recommended
40x40	Icon-small-40.png	Spotlight	Optional but recommended	Optional but recommended
80x80	[Email protected]	Spotlight on devices with Retina display	Optional but recommended	Optional but recommended
29x29	Icon-small.png	Settings	Recommended If you have a Settings bundle, optional otherwise	Recommended If you have a Settings bundle, optional otherwise
58x58	[Email protected]	Settings on devices with Retina display	Recommended If you have a Settings bundle, optional otherwise	Recommended If you have a Settings bundle, optional otherwise

iOS6.1 and Previous versions icon size and its name

Image Size (px)	File Name	Used for	APP Store	Ad Hoc
57x57	Icon.png	Home screen on Iphone/ipod Touch (IOS 6.1 and earlier)	Required	Required
114x114	[Email protected]	Home screen on Iphone/ipod Touch with Retina display (IOS 6.1 and earlier)	Optional but recommended	Optional but recommended
72x72	Icon-72.png	Home screen on IPad (IOS 6.1 and earlier)	Required	Required
144x144	[Email protected]	Home screen on IPad with Retina display (IOS 6.1 and earlier)	Optional but recommended	Optional but recommended
09:29	Icon-small.png	Spotlight on Iphone/ipod Touch (IOS 6.1 and earlier) and Settings	Recommended If you had a Settings bundle, otherwise optional but Recommended	Recommended If you had a Settings bundle, otherwise optional but Recommended
58x58	[Email protected]	Spotlight on Iphone/ipod Touch with Retina display (IOS 6.1 and earlier) and Settings on devices with Retina display	Recommended If you had a Settings bundle, otherwise optional but Recommended	Recommended If you had a Settings bundle, otherwise optional but Recommended
50x50	Icon-small-50.png	Spotlight on IPad (IOS 6.1 and earlier)	Optional but recommended	Optional but recommended
100x100	[Email protected]	Spotlight on IPad with Retina display (IOS 6.1 and earlier)	Optional but recommended	Optional but recommended

The size and naming of all icons in an iOS project