The company said it was adding only those three cities to "create the best tipping experience" for passengers and riders.
Get Data Sheet, Fortune's technology newsletter. The company is also rolling out the option in Minneapolis and Houston, and plans to bring it to every city in its market by the end of July.
You'll be able to officially tip Uber drivers soon.
The biggest surprise: Uber is adding tips, starting today. Tips belong to the driver, and there are no service fees.
This isn't the only change coming for drivers - although Uber acknowledges it's the one that's been most requested.
Shorter 2 Minute Cancellation Window You'll receive a cancellation fee if your rider cancels after more than 2 minutes (down from 5 minutes previously). But even though we can all agree that drivers deserve gratuities for going the extra distance (or just waiting for you when you take longer than two minutes to get the hell out of your house), Uber hasn't made it easy. Quest is a driver incentive that pays a reward when a driver completes a certain number of trips in a certain time period.
So far, the first chunk of reforms are focused on helping drivers earn more money, though the website hints that future batches of changes may fall under different themes.
Driver Injury Protection Insurance You have the option to help protect yourself, and your earnings, in the event of a covered accident.