Vertical scrolling
Vertical scrolling is an application standard that has existed for multiple generations of computer software, and mimics real-life interactions with the one of the most common forms of calendar (the spiral-bound one hanging on fridges the world over.)
Yet OneCalendar scrolls sideways. This breaks convention and is counter-intuitive, especially since weeks and days both allow vertical scrolling. Changing this - or at least adding the option - to scroll vertically would be much appreciated. Additionally, if the application did not force one to "stop" on months in month view mode, it would make scheduling appointments near the end of a month, or events that span months, easier and more intuitive.