It’s definitely usable on mobile, you have to keep touched the Calendar area for a couple seconds and then it fires the new event action. The single-touch is valid only for existing events.
But still, there are some major bugs and issues that needs addressing.
Eventually @levon you should consider taking this job creating the plugin from scratch?
I will be sold even for a pre-order thing to help developing, this is a major need for a loooong kinds of apps.