Crossfilter might be a bit more popular than TrainAway. We know about 1 link to it since March 2021 and only 1 link to TrainAway. 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.
Trainaway.fit is probably the closest thing to what you mentioned, as they cover many countries. However, they only sell day passes. I used them a few years ago. Source: almost 2 years ago
There is a library called Crossfilter developed by Square https://square.github.io/crossfilter/ Could be useful. Source: over 2 years ago
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