[nobody9999]

>NYC used to have Juno, but it went bankrupt in 2019. I feel like if you can't run a single-city rideshare app in NYC, you're gonna have a hard time doing it anywhere else.

I haven't used it (I always pay cash, as the drivers are charged ~3-5% per fare for "CC processing" when a card is used), but every NYC taxi has a feature where you can pair with the onboard system and pay with your phone.

Not sure what "pairing" requires, perhaps someone else has used this feature and can comment.