can i use Python build a app to help people recording everyday eat,drinking data? how to begin with design and coding?

Question

and the app give people statistics, give people plan for good habit.

Answer 1

What kind of app are you prefer to built?

If you are about a web site - you can look at Django framework - https://www.djangoproject.com/

If you are about mobile apps you can look at Kyvi - https://kivy.org/