HopStop, until recently the go-to app for New York’s savviest subway navigators, is nearing the end of the line. It has been owned by Apple for two years, and as of this month, it is no longer featured in the App Store. For those who have the app, it continues to operate at the time of this writing, but now the core of HopStop’s transit directions has been folded into the Maps application of the newest iPhone operating system.

The transit feature in Apple’s iOS 9 is passable, and will no doubt improve. It gave me competent directions from my office in Midtown Manhattan to my house in Bedford-Stuyvesant, Brooklyn. But many of the features that made HopStop such a useful tool — a subway map that was available offline, a panoply of suggested route options — are not as easy to use in this iteration.

If HopStop had remained the only reliable transit app in town, this would come as bad news. Luckily, HopStop was overtaken by a competitor two years ago. That competitor, Citymapper, remains the single best app for finding your way in the city.

Azmat Yusuf, the founder of Citymapper, said he had started hearing from a lot of formerly dedicated HopStop users who had made their way to his app.