Not used it myself but I’ve heard of an iPad app called AstroPad, essentially it’s supposed to allow you to use your iPad with your Mac as a graphics tablet like a Wacom. That might be part of the solution at least.
I am creating demonstrations in macOS software, I want to annotate over them in real-time during a lecture or annotate over them after the fact. Actually, I realized that I can do the latter in Camtasia. So what I want is to annotate over a projected screen real time.
Maybe too late. But you can use Explain Everything EDU. Quite a good all in one piece of software. I use a more complicated setup for a digital whiteboard in which I record. I too have moved entirely online. Maybe until August.
I again went searching for an iPad app that would allow me to annotate over the iPad display while mirroring a screen from my MBP via SideCar. I now found this.
It does the basics fairly well.
From what I see, the more sophisticated app AstroPad will do annotations only when the native macOS app supports the markup features directly. The same may be true of Duet.
Are there truly no other competitors for Epic-Pen?