Changing font sizes in the iOS client still seems to be a missing feature. This requested in an associated thread goes back to 2010. Please EN add the ability to change font sizes in notes and to set the default font size.
algomusic replied to soundsgoodtome's topic in Evernote for iOS Issues (Versions 8.24.6 and under)Font size control on the iPad version of EN continues to be a problem. The only solution I've found is to increase font size on my Mac then sync. Not ideal. EN, please add font size controls to the iOS client.