I have a web app implemented by K2 smartform. I'd like ask you 2 questions as below:

   -  How to convert to web app on smart phone, tablet. I only re-design UI  for Smat phone ? Are there other ways to convert faster ?

  -  When i converted to web app of smart phone. can the website run with all Browsers which supported by some OS As  Android, IOS, Blackberry, Windows phone

Anyone can help me. Thanks advance