Sometimes along the last updates, Agenda got the ability to sync the appearance preferences – for instance, the selection of note font now syncs between Mac, iPhone, iPad, etc.
I realize I’m being a nuisance, but I actually liked the ability to select different note fonts on Mac and iPhone 
it let me give Agenda a different feel on each device – more business-like on the Mac and more touchy-friendly on my iPhone, for instance. The design of notes is also slightly different between Mac and iPhone – the ratio of note margins to screen size, the placement of some icons, etc. These design differences mean it might make sense to prefer a different font on each device.
Just a bit of user feedback 