If, like the author of these lines, you consider that a 12.9 inch screen is still too small to be shared permanently between two apps, here is a better solution! Take two 12.9-inch iPad Pro, lay them on top of each other, and you can multitask a lot more comfortably.
In any case, that’s whatdid Christopher Lawley, photographer, youtubeur and podcaster. There are Lightroom on the bottom tablet and Things which shares its screen with Fantastical at the top. he specifies later that it’s a temporary installation, one of the two iPad Pro is a 2018 model that will move to a new home once containment is lifted.
Without going as far as using the two most expensive iPads in the range at Apple, this “trick” may have its interest. Depending on what you’re doing, having a primary iPad to work on and a secondary iPad to display a document or web page may be helpful. Especially since the majority of good apps synchronize their content constantly and with Handoff, you can easily switch from one to the other.