For some reason I prefer Weight Tracker over the other couple of apps with similar functions that exist here. If I could combine features from them all into one single app that would be great.

1) One thing that bugged me from the start is it only records whole numbers--decimals or fractions would be great--even if they were rounded to the nearest 0.5!

2) Like someone else mentioned earlier, graphing the data as a line+curve or just having some sort of visual representation of the changes would make this something worth paying for.

3) Please give it automatic updating functionality via the Sparkle framework.
[ http://sparkle.andymatuschak.org ]

4) Having sliders for the Ideal Weight and Weight Goal box is a bit misleading since it looks like something that can be fiddled with directly yet doing so has no effect. Perhaps if the user moves the slider the number moves as well. Or change the sliders to a static graphic that won't be confused as part of the UI.

5) Record the time of day or at least whether it's day or night.

6) Color-coding the individual record entry lines to reflect UW/OW/Obese range.

That said, I like how Weight Tracker collects data without having to save a separate file to hunt down later. A family could benefit from this app if there were an option to make the data accessible across multiple user accounts. Since it keeps track of multiple members it would be nice to be able to compare data side by side or overlapping---like a graph.

Thanks for making it Universal.