No, it is not, because the phone will not be in the sight line of the scope. With the LCD at least you can still sort of keep your eye on what is going on, though for me it is totally unpractical unless I get myself a pair of bifocals. I only use the LCD on static subjects, like test charts or the moon etc, but for normal use the EVF without glasses is my preferred display. I wear a thinish pair of distance glasses and can easily just look over them in the eyepiece.