The ten calories per pound is just a rule of thumb and it doesn't take your height into account, which a BMI (body mass index) calculator must do. Your age is also needed to calculate BMI.
In Fitday2, at the screen with 'Home - Dashboard', go to the 'Home - profile' tab and put in your height and weight information, etc. This is what is needed to calculate, in part, your BMI.
Go to the tab next to 'Home,' 'Log,' and go to 'Log - weight.' This is where you put in your current weight (there's an 'edit' button under 'weight') and your goal weight (use the 'edit' button under 'weight goal').