I am probably late to notice this, but when I am using a Free App, the app platform has a really handy log viewer for viewing error logs. It features colored 'tags' for log entry types and convenient search drop downs integrated into the toolbar. This would be great to have available for paid apps. Maybe it is available and I am just missing it. Thought I would see if anyone from Mendix can chime in with plans for making this available for paid apps.
Screenshot below: