Hopper, the handy travel app that uses AI to predict airfare pricing, is today expanding its service to include hotels. Like airfare, hotel pricing is also dynamic — it can fluctuate with traveler demand. During busy times, prices are higher. And when a hotel has rooms to fill, the prices drop. Now, Hopper is bringing its same prediction technology to more than 270,000 hotels in more than 200 countries and territories worldwide.

The company began testing hotel prediction algorithms back in October 2017, but only in New York. At the time, Hopper CEO Frederic Lalonde explained how online hotel booking differed from airfare. With plane tickets, people are usually just in search of the best price. But with hotels, other factors come into play.

Since the beginning of 2019, Hopper’s sales are up 100% and conversion is up 80%, it says.

The hotel booking feature is live today in the Hopper app for iOS. It will roll out to Android in the next few weeks.