So glad to hear that you are giving the My Diet Diary app a try to help achieve your goals. It sounds like you are looking at the nutrition reports, is that correct? Those are goals for the day that are based on information provided by the US Food and Nutrition. Those are not customized for each person, but are general recommendations. To make sure that you are getting the nutrition that you should, you may want to consult your doctor on what they recommend as well.
If you have any other questions, you can always reach us (the app support team) through the app, just tap on the three lines in the upper left corner of the app, then tap on "App Support".