This article is a good time to plug LibreTaxi: "Free and open source alternative to Uber/Lyft connecting passengers and drivers. LibreTaxi makes ridesharing affordable by getting rid of the third party between passengers and drivers. Negotiate the price before the ride is confirmed, pay cash upon arrival. 1-minute hiring for all drivers." https://libretaxi.org/
But avoiding an argument about price and then having to hand over cash is a large part of why I use Uber...