title: What's the best way to include a build number for Native App Google Analytics tracking?
body: <p>I understand how to send the <strong>App Version</strong> number, but not being able to filter on the <strong>App Build</strong> number is becoming increasingly difficult.  Is there a best practice on where to include the Build Number?</p>
  
  <p>Would it be to append it in parentheis in the 'App Version' variable or as a custom metric? Not sure what would be best.</p>
  
  <p>I'm doing this for both an Android and iOS implementation.</p>
  
  <p>Thanks in advance!</p>