I represent BDM from Satvidi Technologies we do have experience in apps similar to Ubar, Ola etc..
Login Registration for both customer and driver.
Google Map integration.
GPS to show current location of customer.
Taxi’s display to display available taxis.
Getting near by driver
User details window
Promo code applying.
History of rides
Subscription of monthly or weekly basis for both customer and driver.
Please reach out to me for discussions on your requirements.