Interesting idea, but it doesn't seem to work. Even though I give it access to my screen, if I ask it to make a calendar appointment it doesn't seem to use the information on the screen.
As for the comment from the developer, I am unsure how to send you a screenshot, but I am on Android and every time I ask it to transfer something on my screen to the calendar, it merely pops open a blank event in Google Calendar, with no information filled in.