I just started using GageList and so far am liking it.
It's web based, so I can bring my phone out to where I'm calibrating and not have to worry about writing down my measurements and then typing them into the computer.
They have pretty quick responses when I have questions or issues as well.
We only have 1 site, but they have options for multi-site use.
I am not in any way affiliated with GageList, just a short term user.