This is good practice for anyone really. Using an app or notebook to become conscious of what you eat and some exercise are a fairly surefire way lose weight than just trying to find a food hack of some kind. The all X, or eat only Y, or do Z diets tend to all fail after a while when you start wanting to eat like normal food again. With calorie counting and exercise you can just eat normally while being conscious of your portions.

This of course comes with caveats like try to have a general balanced diet and eat healthy. Its not advisable to like at nothing but junk food and make your numbers. That said you can still eat desserts, and munch on chips, and eat pizza and stuff. Counting just helps keep you from over indulging.

Also as with any diets it's a slow and steady process so it's ok if you have a cheat day every week, or slip up every once in a while. You arent a failure and havent ruined all your progress just because you over indulge during a holiday or at a wedding. You just gotta be aware and get back on track as soon as you can.

Also also with any diets where you restrict your eating its good to try to keep a healthy outlook on weight and nutrition as in some cases being overly conscious of consumption can lead to potentially gaining an eating disorder along the way. Calorie counting goes both ways. You dont just limit your intake but you make sure you eat enough every day!