Still, you can consider adding new features to your app, like taxi-hailing service.
To empower your app with the taxi-booking feature, you can integrate the existing Uber API, and Ride Request Widget.
The numerous successful examples of Uber integrations, like Foursquare, Amazon Echo, and others, show us that this strategy works.
You can empower your app with Uber API without spending money on developing Uber-like taxi app from scratch.
This way, Echo and Uber cooperation allows bringing some Sci-fi experience to users' everyday life.
Judging by increased Foursquare user activity/engagement, they love Uber integration: