title: CloudKit: free public storage and data transfer
body: <p>I would like to understand the CloudKit free usage calculation, but I can't. </p>
  
  <p>Could anyone describe what <code>40 requests per seconds</code> (10 per 100.000 users) are? I couldn't find any definition what a request is. If I had 2 apps and every app would ping my <code>CloudKit</code> server at the same time, would it result in two requests per second (for the described moment)? How do I know how to limit the request in my apps and how to queue the requests so they can be done later when the time comes where the limit is not reached at the <code>CloudKit</code> server?</p>
  
  <p>What about the <code>2GB data transfer</code> (50 mb per user)? How should I understand these 50 mb, per second, per day for the eternity? What will happen if one user for one of my apps used 50 mb traffic?</p>
  
  <p>How do I limit my app and still have a good clint server communication? Will I get an error when the limit is reached and won't automatically charged by Apple?</p>
  
  <p>I do really like the programming ease of <code>CloudKit</code> but I'm kinda scared that it could go all way wrong and I will get charged for misunderstanding.</p>
  
  <p>It is really hard for me to imagine how it is calculated.</p>