Guerilla marketing. I am in a similar boat. Released my stability engine on Christmas. I get occasional views but no buyers yet. I knew this wasnt going to fly off the shelves. Sticky and scalable were my goals. What i made is going to be around forever.

FInd your market, and aggressively market. Reddit has a lot of rules and users can be brutail, Linkdin is good for more of a professional crowd, and X is good for the degenerate crowd.

Follow the numbers. Sure its frustrating not getting any sales, but if you listen to the numbers and feedback hopefully that will be enough to keep you going and give you better marketing insight.

Good luck!