title: Can I use KitKat app in Jelly Bean?
body: <p>I am planning to develop an Android app and has been thinking about which version of Android I should choose to develop the app. </p>
  
  <p>I researched a lot of good things about KitKat, but the market occupation of Jelly Bean is still much bigger (13% vs ~60%). If I develop an app in KitKat, can I still use it in Jelly Bean?</p>
  
  <p>Thanks!</p>