公式
https://www.fitbit.com/jp

前スレ
fitbit
http://wc2014.2ch.net/test/read.cgi/shapeup/1365077806/
Fitbit 2
http://wc2014.2ch.net/test/read.cgi/shapeup/1429518432/
Fitbit 3
http://wc2014.2ch.net/test/read.cgi/shapeup/1440832821/
Fitbit 4
http://wc2014.2ch.net/test/read.cgi/shapeup/1451171041/