iPhone X compatibility?

I recently upgraded to an iPhone X, and of all the many apps I use, this one is literally the only one that hasn’t upgraded to it.
Reading most efficiently being a key driver of such a screen, and reading most efficiently being one of the things one would expect to be able to do on a mail app, this clearly is a miss.
I’ve grown used to this app’s way of organizing things, but there are tons of other mail apps with smart workflows. So for now, I’m giving this a few weeks hoping that they’re just about to ship the upgrade; otherwise, I guess one day I’ll get more frustrated than on other days, and I’ll just switch to something else.

Rudy Rigot about Inbox by Gmail, v1.3.180311