For some time now I have been noticing /apple-touch-icon.png and /apple-touch-icon-precomposed.png in my visitor logs (with a 404) every once in a while. Today I finally had some time to find out what it was all about. What I found out is that it is like a favicon but it can be an icon that is bigger and nicer than a favicon to be used as an app icon/bookmark. I actually found a lot of articles on the subject dating back to 2009. I went ahead and implemented it and thought I would share since it is fairly simple.
For IOS supposedly all you need to do is create an icon image of your store logo and name it "apple-touch-icon.png" & "apple-touch-icon-precomposed.png". Place the 2 files of the same image different names in the root of your CS install. The size of my images are 180x180.
For Android & Chrome browsers it's the same but you also need to add tags to let the browser know the location (IOS used to work this way as well in the beginning).
/design/themes/responsive/templates/addons/my_changes/hooks/index/meta.post.tpl
That's all there is to it. Unfortunately I do not have a device with IOS so it would be great if someone can test it and reply with their results. At this time I can only confirm that it works with Android & Chrome.