Its mean that Sometimes customer use any application then never use it..and this thing is happening in Androids..But iphone applications are interesting that it is being used again and again...
But Android OS is rapidly overcoming iOS. Recently there is a larger customer base of Android users as compared to iOS users. Everyone can't afford iPhone, Macs and iPads. Android mobiles come at a very fair price offering customer better customization than iOS. It may also be a reason of Android advancement.