When you go to the food section, you can search for many foods in the database.
It will have most basic foods.Meats, vegetables, fruits etc..
The nutrition will be included in the information.You can choose the serving size,like a cup,or an ounce to change the values.It can be helpful to have a food scale.Then you can weigh your portions when you need to.
You can also create custom foods.Fitday's database is not going to have a lot of products, so you will have to fill in the nutrition information yourself.Just look on the food label on the product,and fill in what they have.Do pay attention to the serving size.Products often have odd serving sizes like saying there are 3.5 servings of something in a can.So you may have to do a little math on some containers.
Once you have a lot of your favorite foods filled in, it gets easier to enter them.It stores your custom foods.And you can also click recent foods to enter things you've had in the last few days.Like you may have a cup of coffee every day.Find it on the recent foods, and click it.
Most food packages don't seem to have full nutrition information.They will have Vitamin C,A,and Iron maybe.You can go to product websites,and find information as well.Most restaurants will have information on their websites too.
If you're tired of starting over,stop quitting.