Hi, I am a passionate Mobile developer with vast experience in Android development.
I have read your project description and I understand what you want.
I have built a ready made Taxi App solution very similar to Uber / Ola Taxi App.
With Very classic User Interface, Registration with OTP verification, Fare estimations, Feed back and ratings for both customer and drivers, Online payment and lots more.
The app as a Web Admin backend to manage the App.
Please contact me so we can talk better.
Hope to hear from you soon.
Best Regards.