Track what you eat, but also how and when. Are you into intermittent fasting? Track that as well — with a customisable period, ranging from 14 to 20 hours — and get notified when your fast ends. See at a glance how much time has elapsed and at what hour it ends.
Color code your meals and food, then extract patterns from your history log. Have you been eating too much lately? Too often? Too much sugar? Not enough vegetables? The best part is that colors can mean literally anything you want, they don't have to mean good/bad; choose whatever works best for you.
Syncs weight data with Apple Health, so you can also correlate your eating habits with your weight evolution. You can also track your stools, so you can correlate your eating habits with your bowel movements. You might find out what foods are causing you troubles.