Yes. To park at ParkBee locations you always need a mobile phone with internet access.
ParkBee offers unused parking spots at company or resident car parks. There are no ParkBee ticket machines or intercoms, just a barrier or a gate. Open the entry with a reservation or with the Parkmobile or Park-line app. If you see a parking ticket machine, it is never from ParkBee and these will most probably be more expensive!