I won’t go into all the reasons why I think you should use Piwik over Google Analytics, that would be a whole blog post in itself. But if you care about privacy, freedoms, and allowing your users to opt out of being tracked, Piwik is the thing for you.

So there are a few options, the best is probably to download and install Piwik on a server you own/control and then set up a website to track (your koha). However if you are unable to do that. I have set up http://piwik.koha-community.org/ on my server that runs the bugs.koha-community.org and dashboard.koha-community. So you could drop me an email and I will set add you as a user and add your website to it.

For both methods you then need to follow the following instructions

1. In Piwik find the tracking code 
2. Copy and Paste the code into the opaccredits in systempreferences (make sure you get the script tags too)
3. That’s it

It really is that simple. Now I can’t promise my dinky little server can handle every Koha site using it for analytics, but if it does prove popular we could move it to a bigger machine, however running your own is really the best way.