The Support section of the MOD-t specifically mentions that AstroPrint supports the MOD-t printer profiles out-of-the-box:
I'm not personally sure whether I'll use that, or OctoPrint (OctoPi) on a Raspberry Pi to control my MOD-t. Either of those solutions should enable to you provide "wireless" printing, it's just that you'll have a tiny little PC that will offer the wireless aspect, and that tiny little PC would be connected via USB. It's an investment in a small amount of funds and additional time, but if it's worth it to you to not have to power on a PC and connect a USB cable.......it's an option at least. (For OctoPrint there are gcode start/end commands in this group somewhere that can be used.)