You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
http://tvthek.orf.at/program/Wien-heute/70018/Wien-heute/7952436/Erstes-E-Taxi-in-Wien-in-Betrieb/7956638
the cab-company plan is to add 10 more taxis.