Personalize the Recommended Daily Amount info provided in the app to set your own daily target calories, protein, fiber, carb, and saturated fat so your diet meets your health goals, eg:
1. Weight loss (lower calorie, carb & saturated fat targets; increase fiber & protein targets)
2. Improving your gut bacteria (microbiome) to protect from or manage metabolic syndrome, diabetes, heart disease, cancer, inflammatory disease, brain diseases, and mental health illnesses (increase fiber target, decrease carb & saturated fat targets).
3. Increasing or maintaining muscle mass (increase protein target)
Monitor your progress in achieving your targets (which can be changed at any time) in real-time as you record your food intake and over time. 
Apple's HealthKit functionality is integrated in the app's user interface so you share your data with Apple's Health app. You can also synchronize data with all your Apple devices, export data and save, as you wish.
Favorite (touch broken heart icon) foods and use serving sizes (which can be changed to your serving sizes) so you can record food easily and quickly.
Add your own branded or other foods and recipes to the 300+ common foods and 10 recipes already loaded into the app.
Also lots of really useful nutrient and nutritional information.
The interface is easy, quick, and intuitive to navigate.
No internet, registration, personal details or additional payments are required.