I brought track weight as it said you can add more than one person and input weight in kg. Yes you can add many users but you can't input weights in kilos. I paid for the app but it does not do what they stated it could do. I feel ripped off. Apple should have a cooling off period so you can get your money back if it does not do what they say it does or you are dissapointed. This is the third app I have wanted to give back. I thought apple checks everything out but they obviously don't .