title: any limitation push notification via APNS or C2DM?
body: <p>In enterprise, we will send push notification to 17,000 employee. They have smartphone(iOS, Android).</p>
  
  <p>We expect to send about 18 millions push notification per year.</p>
  
  <p>Is there any limitation push notification count via APNS or C2DM?</p>
  
  <p>I cannot found officer document in apple or google for the notification limitation.</p>
  
  <p>we must check this, before deploy our app.</p>
  
  <p>Please help me.</p>