ELI5 Activity Trackers - how do they detect deep sleep? -...

What this episode covers

What are the creative ways people fool their FitBit? How does my activity tracker differentiate between steps and my tapping to a rhythm? Does it use GPS to calibrate? How does it know what stage of sleep I'm in? ... We explain like i'm five! Help more people fund us by leaving a rating on iTunes. Thank you to the r/explainlikeimfive community, and specifically the following reddit users whose questions and responses formed the basis of this conversation: failtuna, fieldpeter, devilishgainz, srslylovesgames & groundhogcakeday To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter: https://www.twitter.com/eli5ThePodcast/ or send us an e-mail: [email protected]

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How long is this episode of ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast?

This episode is 8 minutes long.

When was this ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast episode published?

This episode was published on January 23, 2026.

What is this episode about?

What are the creative ways people fool their FitBit? How does my activity tracker differentiate between steps and my tapping to a rhythm? Does it use GPS to calibrate? How does it know what stage of sleep I'm in? ... We explain like i'm five! ...

Can I download this ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast episode?

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