I think the LightRider software is free for 30 days, then $17/yr afterwards ... DmxSoft SUSHI, the world's most attractive DMX controller - (https://www.dmxsoft.com/)Okay....
I always thought that using LightRider with an Android tablet was free.
This video says in order to go thru the USB, you need to BUY the LR license.
I thought I remember it being in the totally free column as well .. maybe they changed that when they introduced the LR512 (similar to the myDMX Go).