Lightroom Mobile looks promising. Would like to be able to print a photo from it. I have a WiFi enabled printer on my network and can print from my iPad via Camera Roll. Would like to be able to print directly from Lightroom Mobile.
Yes you can print from LR mobile provided you have the printer utility application installed on your android, and for i-Phone your printer is configured with your mobile device
How to print from LR mobile
Step 1: Open LR mobile
Step 2: Open your collection and then any image you want to print
Step 3: On upper right hand corner click on the arrow pointing upwards and then click on share
Step 4: Now yo should be able to see a print option on which you can click and print any file you wish to.
Hope it helps
You could send the photo from Lr Mobile to the Camera Roll in Photos and print from there.
You could send it to another app that allows printing.
You could use Printer Pro by Readdle.
But you are printing from a smart preview, so I'd guess the quality won't be great.