I use FoCal with no issues. The non-fully automatic mode is due to Nikon's limitation and not FoCal's.
If you want to fine-tune without spending the money, I recommend looking at this link. It was written around Canon, but works equally well with Nikons. I've used it, and the results match what I obtained through FoCal Pro.
This method is very sensitive, very easy to setup and use. You do not print a target, but use your LCD monitor with the downloaded pattern as the target. On my Apple MacPro Retina Display, I first changed my resolution down to 1024x640 and the pattern was very easy to see when in focus in Live View.