I would like an iPad application icon created.
The app takes data in a spreadsheet style format and performs statistical analysis (hypothesis tests, calculating mean, variance, mode, et).
Some ideas for the design (feel free to discard this and do your own thing) are using one or a combination of a normal distribution with a "rejection region" but artistically off center or one or more of the greek symbols used for statistics. See attached file for the normal distribution curve. The region in red need not be red, it could be textured differently, etc.
What I tend to like:
My favorite icons currently in the app store are fairly simple and clean. I like wood textures and brushed metal/etched metal textures (though don’t limit your creativity to just these). Also I would like the icon to look good with the rounded corners that apple iOS applies. The real “icon” should not have rounded corners according to apple, however it can be designed to look good when rounded (note their system preferences icon). I have put information on the corner rounding in the requirements below.
I like the following icons:
Omni groups icons (all of them):
Apples system preferences:
Notes Plus from the App Store:
Please do not add the “Shine” at the top of the icon. iOS does this automatically, and I would prefer and icon that doesn’t use or need the shine.
For all images and icons, the PNG format is recommended (avoid using interlaced PNGs).
The standard bit depth for icons and images is 24 bits (8 bits each for red, green, and blue), plus an 8-bit alpha channel.
You do not need to constrain your palette to web-safe colors.
As this is an iPad app, I will need versions of the icon in the following sizes:
144 x 144 pixels
512 x 512 pixels (for app store)
1024 x 1024 pixles (for app store)
I would like the icon to look good with the corner rounding that automatically gets applied. From my research this is the corner rounding radius (your icon should still be “rectangular” but should look prepared for the auto-rounding that will occur.
Apple starts with the 57px icon and a radius of 10 then scales up or down from there. Thus you can calculate the radius for any icon size using 10/57 x new size (for example 10/57 x 114 gives 20, which is the proper radius for a 114px icon). Here is a list of the most commonly used icons, proper naming conventions, pixel dimensions, and corner radii.
Icon512.png - 512px - 89.825
Icon.png - 57px - 10
Icon@2x.png - 114px - 20
Icon-72.png - 72px - 12.632
Iconfirstname.lastname@example.org - 144px - 25.263
Icon-Small.png - 29px - 5.088
Icon-Small@2x.png - 58px - 10.175
Also, as mentioned in other answers, you don't actually want to crop any of the images you use in the binary or submit to Apple. Those should all be square and not have any transparency. Apple will automatically mask each icon in the appropriate context.
Here is a like to Apples official icon guide: