How does it work? – LoseWeight - Digital Bathroom Scale Review

The question may seem dumb, but I cant believe you are supposed to step on your iphone to weigh yourself. Is this just an App to KEEP TRACK of your weight by using your bathroom scale? I dont want to even test it by stepping on my new iPhone. When it cracks, no one will be responsible for not having made clear how to use this App.
Review by lsrd on LoseWeight - Digital Bathroom Scale.