I agree with Larger...my wife is using myfitnesspal on her phone at 60/20/20 and it's going pretty well. She burns an average of 600 cals in her cardio routines. I will ask her later what her actual cal goal per day is. I think it's 1200 but don't quote me! Due to her hypoglycemia she has to eat 5-6 times a day.

Is your wife adding resistance training to her routine. Added muscle will make her a more effeciant fat burner as you know!