A neat little weight tracking app by Uptown Apps that I came across a week or two ago. Just launch the app and input your weight whenever you step on the scale. The history view shows you a list of all of your data points and tells you how much weight you’ve lost or gained while using the app.
You can tell the app to send you a daily notification so you never miss a weigh-in and you can even choose what time of day it reminds you. But, the best feature of all is that it syncs with Apple’s Health app so you can keep all of your data in one place.