1. First of all, users need to have an Apple phone with 3Dtouch function, but Android phones don't have this function for the time being.

2. Then turn on the phone and turn on Settings-Accessibility-Touch -“3D Touch and Touch.

3. It is worth noting that the sensitivity of three-dimensional touch needs to be strengthened, and all settings on the mobile phone can be completed.

4. Then the user needs to open a webpage for online use, which is convenient for fitness users to calculate the grams of food.