the first month is 5$. try it.I really wish Nirvana had a full trial. I'd love to transfer my entire system over to test it out, not just monkey around with the limited free version.
once i uploaded all the projects/next actions/someday list/references to Nirvana, and i APPLIED the tags/areas i never went back and saw Instantly the power of the app - having that Bird's Eye view on Everything, and bought the whole app (around 49$)
I'll be using this for years