Icons for universal iOS apps
App Store Icon
- 512×512 (scaled down to 175×175 for display in the store)
Application Icon
- 114×114 (iPhone 4)
- 57×57 (older iPhones)
- 72×72 (iPad)
Spotlight Search Results and Settings Icon
- 58×58 (iPhone 4)
- 50×50 (Spotlight results for iPad)
- 29×29 (settings for iPad and older iPhones)
Document Icon
This is a new icon type in iOS 4. It’s used if your app creates a custom document type. The iPad uses the document icon in two different sizes.
- 320×320 (iPad)
- 64×64 (iPad)
- 44×58 (iPhone 4)
- 22×29 (older iPhones)
For every image in your app, add a second version that’s twice the size, adding @2x to the name. For a low-resolution image named image.png you would add a second file named image@2x.png. The new image will be picked up automatically by iPhone 4. Everywhere your code requests image.png, image@2x.png will be used instead.
Thanks to Neven Mrgan for the Photoshop template: http://blog.cocoia.com/2010/iphone-4-icon-psd-file/.
iPhone Icon Resize Tool: http://www.nbsoftlab.com/nbblog/?page_id=131.
There is also a web app to simplify the icon resizing for developers: http://rdicongen.appspot.com/.
