ISO program/method to streamline/batch process printing envelopes

[Benjamin Cowles]

I use a standard printing app from my phone but it doesn't operate off a queue so I have to tell it to print each envelope one at a time, and my Canon Pixma MG4120 printer spits out these little 3 5/8 x 6 1/2 envelopes on an angle when the stack gets so low. Pain in the butt. I've cleaned the rollers and put it  through all the maintenance functions. 

Ideas anyone? Preferably an Android app otherwise I can use my windoze pc.  And any good sub $200 printers that can correctly hold smaller envelopes? Thanks!