Ok, noproblem :)
Why "it isn't specific enough" for you? You didn't answer my question: are you using any skin (and what in positive)?
Did you try to edit and change ui_android\xxx_yyy\ui\params_landscape.css and ui_android\xxx_yyy\ui\params_portrait.css files?
There is also possibility to change default fonts, by replacing default with some others. But, again, we need more informations about version of Primo and accompanying files you use.
Or, maybe, replace data.zip with some others, or change some other skin, or combine possible solutions...