Mint, GooDong are fine.

Calories go in two directions, one in and one out, and as long as we consume more than we take in, we lose weight. From my experience of being on a diet, there are two apps that are worth a try, with a few steps on how to use them by the way.

Know your own calorie consumption, that is, daily consumption without exercise. This is related to our age, weight, gender, etc. This can be measured using the Mint app.

Enter the amount of food or even the exact method of doing it and it gives a relatively accurate feedback. You can monitor your diet 24/7 for the first few weeks, and after that you can visually estimate the calories of each food in your mind as you get familiar with it.

After you know what you're consuming, you can start calculating your exercise consumption. The most direct way to lose weight is aerobic, and most aerobic machines (treadmills, ellipticals, etc.) come with a calorie counting function. And for outdoor cardio measurements, I recommend using Gudong Sports.

This app can measure outdoor exercise such as running, biking, skiing, and more. Based on our information (still weight age these goods) to calculate the calories burned, but also gives information such as time per kilometer.