I did end up buying it for 1.33.
I have to say say I really bought it for the graphs though. It does however use a fair amount of data to upload the graphs. It does have an option to upload only with WI-FI.
The data screen is customizable for just about every parameter.
Overall I would recommend it but the $3 plus price would be a deterrent.
It's funny how we'll spend $4 for a gallon of gas but a $3 dollar non essential app isn't worth it. Human nature I guess.