Runtastic might be a bit more popular than Simbi. We know about 1 link to it since March 2021 and only 1 link to Simbi. 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.
Personally, I just hired some one on Simbi, which is in essence is a barter economy. So I didn't even spend USD on it. It was nice as someone on a shoe-string budget. Ref link Non ref. Source: almost 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
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