Big Smile Zipper is a beautiful zip screen lock application with nice smile animation. Big Smile Zipper is a free application for android based smart phone. Very easy to use, just drag the zip downwards and your mobile is unlocked. Big Smile Zipper screen lock comes up with beautiful high quality graphics. Application has Enable and Disable button, so it is very easy to Enable or Disable app. You can press home button to close this application. Application is compatible with almost every android smart phone. So enjoy Big Smile Zipper screen lock and please don't forget to rate us and give your feedback.