I don't find it scalable. I'm using the Schedule view. I see one view that you can scale, but it only adds additional meeting detail, it doesn't change font size. That said, I'm not having the same issue as original poster. My font size seems the same here. I'm also using Nova. Go figure, right?
As issue involves a 3rd party app, fix needs to be performed from the application side. It would be best if you let app developers know of this issue through their support channels.
