The costs and challenges of porting are easily underestimated – even spanning two rather closely related platforms (OS X and iOS) has left the resources of the Omnigroup discernibly stretched … (iPad ergo et cætera).

This kind of discussion always comes up, but in practice a Windows port seems to have defeated (for the moment) even the (technically rather proficient) enthusiasts of TaskWarrior, which has quite a simple command line interface ...