Well, I know the guy that makes APTuner is working on a hardware version. I still use the PC version, even if it isn't being updated...it is still amazingly accurate. I actually use the needle mode, and look at the numbers, not the needle (the numbers are more accurate than an needle can be).
I think this APTuner is one the best if not the best non hardware tuners I have ever used. I actually bought a copy of Petersons StroboSoft for Windows a few years back.
I know most people feel Peterson makes the best tuners but personally I'm not a fan of strobe tuners and just never could get use to using.
Its such a great tuner app shame the dude stopped updating the PC version It really would be nice to be able to look forward to regular updates ?
The guy answers questions on his APTuner Facebook page, so you can probably ask if a new version is in the works.