SO, for now, here is a translated post, but the please note that the survey itself is in German.
Hello dear QS community,
As part of my bachelor thesis I examine user behavior of fitness trackers. I would be eternally grateful to you if you take at most 10 minutes to take part in this survey:
The study is of course also suitable for people without fitness trackers and on top there is a raffle where you can win two Amazon vouchers worth €10 each.
I'll be pleased to see any response.
Here again the link: https://www.soscisurvey.de/BA_QuantifiedSelf