They charge via in app sale the costumer for ordering a taxi. stupid business model. you can also not pay via the app. the worst thing: they start the meter when you make the booking. so i had 6,50 on the meter without driving any meter. hopefully hailo, get raxi or mytaxi will jump on the market and show g7 what vustomer service means.
Schiller5 about G7 TAXI – Commande de taxi, v1.2