Today’s update makes SF the default font! It also adds settings to change the font size for story title, text and metadata. There will also be another update tomorrow available which will also add ability to edit the padding around elements to make it as compact as you like which lets you see more content on screen. Check out the screenshots of what it would look like after tomorrow’s update (note that all sizes will be fully customizable to your liking):
https://www.dropbox.com/sh/wd2n18vh77y94of/AAC5bwOI1xWL1rtuL...