I know we'd all like to lose weight, as am I, but I have a friend who is anorexic and I wouldn't wish the affliction on anybody! She is 5ft 8" and weighs 42 kilos (which I think is about 6stone 3lbs). Can her husband use this app to help her? We'd like to get her to eat at least 1000 calories a day because the lbs are…