A new drop-off or an added stop: the app shows the new fare and changes nothing until you confirm. A toll on the route is added at cost. Extra waiting you caused, a detour you asked for, or cleaning can be added as a separate charge, only after GuyWay approves it. Waiting is not charged by the minute.
What can change the fare after I book?
A new drop-off or an added stop, which you confirm first, and tolls at cost.