How do I change my units of measurement (weight, distance, etc)?
In the "More" tab, click on "Settings" and then on "Units of measurement". You will be able to change the unit of measurement of your choice.
How do I change my first and last names?
In the "More" tab, click on "Settings" then on "Edit your profile" at the top (with your first and last name). Then you can change your first and last name.
How do I change my goal?
In the "Home" tab, click on the "You" bubble. Then, in "My information", select the square "Goal" and choose a new one.