The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
Willow & Husk
The app is useful in showing an example of structured data but ultimately there were enough errors in the data it produced that I just used the app to write my own structured data and fix the errors.
Useful but basic tool. It'll test your pages etc but won't fix them, you'll have to do that yourself.