As far as I know and based on my experience, the apps on Android informer are just listed. There is no private information displayed. If you look on many of the apps listed, you will see the same information as it is on Play Store. Everything is publicly available. The details listed on Play Store (which is a public place) is also listed on Android Informer.
However, if you have any privacy concerns, open a ticket here: http://support.informer.com/?start&android