Zielnetz finds the mobile network operator for german mobile phonenumbers. It warns if you phone to an expansive network or if you reach your monthly free minutes an sms. Also it provides statistics in with networks you phone and sms the most.
You get 5 apps, one webpage ( dro.io ) and one twitter account ( Zielnetz )
The main app needs an update.
Until today, Zielnetz has generated about 45.000 USD. What you see here in apptopia is only one revenue source, there are much more sources which generate revenue for Zielnetz, ask me if interested.