Runtastic might be a bit more popular than Arc App. We know about 1 link to it since March 2021 and only 1 link to Arc App. 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.
I'm using http://bigpaua.com/arcapp on my iPhone, and even the GPX track it records in the background is good enough to do some mapping, for example when I'm hiking or biking. Source: over 2 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
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