NextBusDC, a smartphone app that had been tracking the arrival times of Metro buses for users since 2009, has quit working, according to a Washington Post story.

The app, which is the end product of a partnership between NextBus—a company that tracks transit system data, and AppTight, which makes the data user-friendly in an app format, stopped working on Dec. 20, according to the In The Capital website.

In The Capital reported that a contractual relationship between the two companies “ceased,” with NextBus receiving only three days’ notice and AppTight no notice at all. AppTight’s Kelly Beener remarked that only the data feed to the DC app has stopped, and the San Francisco version continues to function.

NextBus’ Ken Schmier told The Washington Post that he has “received 7,000 complaints about the service ending,” and expects the app to be back online within about a week.

Metro chief spokesman Dan Stessel said that Metro is neither involved in the dispute nor an official supporter of the app, but mentioned that the same information is available on Metro’s website.

At the time of writing this article, the NextBus DC app was not available on iTunes or via the Google Play store.