It's interesting service. Do you know something similar, but to be able to run it on 'local'. As I don't want any service provider to know exactly what and how many coins I'm holding. And when I', moving it. Call me paranoid, but with Big Data you can do a miracle quires in Python.
You don't need to provide any data, I think even email is not mandatory.
So no one from cointracking can know who you are.
If you are still paranoid, you can use VPN to hide your IP and such stuff.
I heard from "cointracer", this is a local program, but I never tried it and I fear it is only available in german:
https://www.cointracer.de/and I think it has no graphs and such stuff, it is only to calculate profits for tax purpose.