In short, yes the EyeGlass Numbers can be used to order a pair of bifocal lenses, but you need to know what your NV ADD+* number is. If you are over the age of 40, both the EyeQue Personal Vision Tracker and VisionCheck apps will provide this number for you based on the age. By using that NV ADD+ value along with your EyeGlass Numbers you can order a pair of bifocal lenses.
*Please note, although the EyeQue PVT app does provide an NV ADD+ value, it does not measure for presbyopia. That value is a good starting point for your age. If you know your reading glasses value, you can use that along with your EyeGlass Numbers.