Uber is taking its feud with Mayor Bill de Blasio to the app itself.

It comes as the City Council is set to vote on a plan to cap the number of ride-share cars on the street.

Uber users can now select a "de Blasio" function on the app, showing what service would supposedly be like under proposed restrictions.

It displays a message of "see what happens", along with a 25 minute estimated wait time for a ride.

Uber critics say more regulations are needed to cut down on traffic, while supporters say they will hurt job growth and consumer choice.

A spokesperson for the mayor's office calls Uber's new de Blasio function "ugly and disingenuous."