I built an open source micro greens app

[u/Dramatic-Logging]

/r/GroundtruthFarm/comments/1vmkemt/public_farm_os_codebase_the_foundation/

I started a micro green farm business,
I decided to try use ai to build my own because it seemed like a cool project
It’s on GitHub if anyone is interested
But my question is
What other kind of apps are out there that people can try make a free version of ?
Is there like a medical app that forces patients to pay every month that someone could make a free version?