App icons.

maybe the apps you are getting do not really have retina display icons yet. i have quite a few that are still using low res icons, it's a pain, but i have no control over it

 

Those apps displayed in the app store all show the high resolution icon, even if the developer hasn't made a high resolution icon for their app yet.

When I learn this, I didn't know it was possible for apple to do this.

But yeah it sucks that once you download it and the developer hasn't made a high resolution icon yet, your stuck with it until they update it.

But this got me thinking, why can't apple just use there high resolution icon to be the one displayed in our home screen. I understand it's because it's all on the developer since it's all in the download, but maybe apple can just display it in a high resolution that's not included in the download of the app.

 

this has been bugging me too.

 

Developers are requred to submit a 512x512 icon separate of their app package. In the package they include the appropriate sizes for iPod touch, iPhone 4, and iPad.

Downloading an app displays a shrinked version of the iTunes 512x512 icon. Once the download completes, the package icon is displayed. If the Dev doesn't have an iPhone 4 icon in the package, then you get the standard, low res one.

 

samples please

 

The low res icons on the iPhone 4 bug me too. It shows how some developers might be on the lazy side with their updates. However, if you are jailbroken, you can go into your phone through SSH and access the .plist file for the apps and you can edit the size of the picture to half the size, which makes the icon display in HD for the retina display. There is a big thread about it in the hacks section called something like "HD icons for normal apps!!"