Habitat Office - App
The smartphone as a door opener. Billing, booking and everything else? Done your app!

Solution

Belongs to the "Wohlfühlbüro".
You can register in the system, then open the door,  take a look at the bookings (with times) und the app  records your working-times and wrote the bill.
And final you report automatically with the door open on the system and have free access to the wireless lan.