Runkeeper is the latest company to retire its Wear OS app. The reason? They claim the app was buggy for most of its users and so they're just opting to take it out of the app starting with version 9.13, which will come out in the next few weeks. The company said in an email to its users that they "want to provide the best tracking experience possible to everyone who uses the Runkeeper app, and we're just not able to offer it on Wear OS by Google at this time." In a follow-up message, the company said it preferred to focus its "limited resources" on other tasks. Runkeeper developers also mentioned that only a small number of its members used the app, so they opted to just get rid of it.
Source: Android Police