BUFFALO, N.Y.--You can now tip Uber drivers through the company's app.

According to Uber's website, in-app tipping is now available everywhere in the United States. You can add a tip when you rate your trip. Your name will not be associated with the tip, and Uber doesn't charge extra for tipping.

Uber is celebrating the national launch by matching all tips on rides taken Tuesday, July 18.

According to Uber, the match is limited to in-app tips added within 24 hours of trips started after 12:00am PT on Tues 7/18 and before 11:59pm PT on Tues 7/18.