title: Cloud database service for android application
body: <p>I'm trying to write an android app that contains list of notes and sync them between other users (for example, if two users use the app and one of them update the list the second will get the updated automatically). I read about mongoDB and I'm trying to use it for this propose  (I'm looking for a free service cause I'm in a study period). can I use mongoDB to implement it? is there something simpler? I read about the REST api and I didn't understand how should I work with that.. why does all the example with mongoDB appears with localhost url? it should be a cloud service isn't it? I opened an account and I'm trying to use it from my android app by sending GET request without success.. Am i missing something? should I implement a server side too?</p>
  
  <p>Thanks in advance</p>