watchOS might be a bit more popular than RunKeeper. We know about 1 link to it since March 2021 and only 1 link to RunKeeper. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Runkeeper: Asics’ fitness tracker is available for iOS and Android and does just about everything in terms of route planning, activity tracking, and metrics. Source: over 2 years ago
You can find the list of compatible watches all the way at the bottom of this page: apple.com/watchos/watchos-7 (it's right above the SDK section) Hope that helps clear up your confusion! Source: about 3 years ago
Strava - The #1 app for runners and cyclists
InfiniTime - InfiniTime is an open-source, C++-based firmware OS specifically made for the PineTime smartwatch.
Runtastic - Runtastic offers a series of fitness apps that can be used to track your running, walking, hiking, and cycling, as well as many other fitness routines. Read more about Runtastic.
wasp-os - Firmware for smart watches based on the nRF52 family of microcontrollers (including Pine64 PineTime)
MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.
InfiniLink - iOS Companion App for InfiniTime and the PineTime smartwatch