[Avodah] Fitbit on Shabbos

[Michael Poppers via Avodah]

R'Micha wrote:
> If someone were to wear one on Shabbos, every step is counted (or toss
and turn in bed recorded, or...) but the only effect on Shabbos is in
the voltage levels in microscopic traces within chips.
​
>
​
After Shabbos, however, the effects of what he did on Shabbos are
observable. <
Seems similar to an automatic watch, except for there being post-Shabbos
utility to the recorded unintentional-exercise-on-Shabbos data.
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