I bought Galaxy S4 last week. Previously used note 2. Thought of changing launcher and installed nova launcher. It's design, speed are good. I was facing a typical problem with it though. Whenever i close an app after certain period of usage, this launcher crashes and TW reappears. This happened thrice. I have seen same kind of complaint with apex launcher in play store reviews also. How to overcome this problem and be able to use these launchers smoothly? I actually liked the way nova worked, but i can't bear these crashes now and then. So i uninstalled it. I am new to this launchers. So need help......................................