My desktop app looks wildly different on my MacBook monitor compared to my secondary monitor, which I'm guessing is just attributed to them having very different densities. But there must be a way to handle this so that you can move your app across displays whilst keeping the appearance in size/scale fairly similar? What's the trick that I'm missing?

Wildly how? Layout of elements, size of elements, size of window, something else?

I ran into this and kinda sorta solved it with some hacky density setting based on the width. I don't recommend it though, there should be an easier way

Size of elements. Massive difference

There were a lot of fixes regarding screen density after beta5. Try the latest 1.0.0-beta6-dev464

Thanks, will do