Sounds like a good plan. But I have one concern. The MVP, at least for me, is that I don’t have to install another app on my device to make (the current service) work for me (if I’m not wrong, that is). But if I have to install another calendar app, I might give it some extra thought. I’m not entirely sure what’s in store, but I’d think of ways to do the integration without having to install another app.
Maybe a web app where I can manage integrations. But it would be awesome if everything goes into my Google Calendar (or Apple’s counterpart) app itself.
This is just my POV. Nonetheless, it sounds interesting and I’d love to give it a shot.