I have used several iterations if the this app scale over the years. In my experience, they just keep getting better and better! The software isn’t perfect, and the scale isn’t something you would bring with you to the lab everyday if you were a nuclear scientist (WAY to big for measuring atoms, for starters...), but it is consistent. I have found it to be the best product anywhere near this price point for doing all that it does, which is a lot! I have recommended it over the years to several different people, and they have all been happy. Consistency is the most important thing- with any scale. Place it in the same place every Time you use it. Make sure it’s on even ground. Wear the same outfit every time you use it, be it a suit (your birthday suit is the best suit for this type of thing), dress, Pj’s, whatever- just keep it the same articles. A little moisture on the bottom of bare feet helps a lot with the natural current you produce being read by the scale to in order to give you the extra details like body-fat/water, so after a shower doesn’t hurt. My only request to the developer(s) is please keep developing developing developing!