Runtastic might be a bit more popular than Stridekick. We know about 1 link to it since March 2021 and only 1 link to Stridekick. 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.
There are 3rd party services which do this kind of thing. For example: https://stridekick.com. Note, I’ve never used to this nor am I advocating it, it was just the first thing that popped up in a DuckDuckGo search. There are assuredly others as well. Source: about 3 years ago
Workaround is to use SHealth only, export gpx file, then import it through runtastic.com (Profile (Arrow Next to profile picture) ->Settings->Activity Import). The imported workout count for the challenges. Source: over 1 year ago
MediKeeper - MediKeeper is a multi-functional technology company that develops customizable portals, allowing wellness companies, benefits providers, health planners to efficiently manage or organize the diet structure of their worthy customers.
Strava - The #1 app for runners and cyclists
Azumio - Azumio is a mobile health company that specializes in mobile biometric technology, which is designed to track your health status and provide daily, weekly, or monthly basis reports related to workouts in the form of graphs or charts.
RunKeeper - Join the community of over 45 million runners who make every run amazing with Runkeeper. Track your workouts and reach your fitness goals!
EveryMove - EveryMove is a fitness tracking website that is developed to simplify the way you manage your goals and empowers you to make your lifestyle healthy or fit.
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.