It's called Cronometer. I use the Android free version. You can add a food by name, by type, or by scanning a bar code from packaging, and then add the amount you ate of it, usually in cups, tspn, ounces or grams, or portions thereof. You can enter recipes of things and determine a portion size. For example I entered all the ingredients in my morning smoothie, so I just enter 'smoothie' .rather than each ingredient. You can star items that you eat frequently and store them on a favorites list.
It becomes very quick after you've entered many of your frequently eaten foods and get used to the app.
The amount of nutritional info it instantly calculates is amazing and illuminating. I highly recommended it.