Silver
It trackes it by the phone going up and down, so honestly you could just build a shaker and have it do that so you can get all your steps everyday. It's honestly kinda funny how easy it would be to cheat the whole step thing
I'm not very good with technology so I don't understand how is this tracking my steps what the hell did I just put on my phone and what type of permissions did I give it ๐คฃ