privacy?

The app itself is an improvement to the default osx calendar, but in privacy concerns:
despite the advertising slogans from the website which suggest a privacy promise, the app wanted to connect to some data/statistics/advertisingmarketing sites - WHAT FOR?
So I recommend to app firewall and controll the connections of this app.

beside this, it has some awkward behavior related to contact search. It doesnt find a name of a FB friend I have exactly with the searched name in my friendslist, but suggests many others, some even not related to the search term.
This could also be an API problem, but it would be nice to see some improvement of this.
Also improvement could be accomplished by pulling data from a known social network link (e.g. the manually added facebook link of this mentioned contact).

Beside this, the app is a pretty good tool.

Kurzname_2000 about Cobook, v1.2.9