The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
The application while it worked was exactly what I was looking for .... unfortunately it only worked one day and after a week talking to support they told me that I had to wait for them to be available. It is fine that it is a free application but I particularly prefer to pay for one that gives me a better service. In the end I have removed the application.