Are you talking about the app going unnoticed on the phone? Or some other place where icons need to be distinguishable? So on my iPhone I only keep the apps I

Are you talking about the app going unnoticed on the phone? Or some other place where icons need to be distinguishable? So on my iPhone I only keep the apps I use and I know where they are. I don't download random apps so nothing really goes unnoticed. The only problem would be if an icon looked very similar to another icon. Only then would I not appreciate the design of the icon. On the first page of my home screen I have Chrome,Calendar,Gmail, Flickr and Safari all with white backgrounds. I also have Safari To Go, Facebook,Tweetbot,Trello and Mail with varying types of blue backgrounds. The logo/branding on each is unique enough for them to all look significantly different.