Enabled Wearable Activity Calories can be shown in the Exercise section as Fitbit Active Calories record. This record reflects your additional calories burned beyond Activities records in Fitbit, for example, calories you have burned while walking. Fitbit mobile app calculates and displays all calories burned. Resting Calories and extra active Calories are shown there as Daily Total Calories Burned. Fitbit Daily Total Calories Burned imported into MyNetDiary. But, they are shown in Exercise Notes only. To calculate Fitbit Active Calories, MyNetDiary and PlateAI subtract Weight Maintenance calories from Fitbit Daily Total Calories Burned. This number of active calories is calculated according to your activity level. The value includes only calories burnt beyond expected. This is needed to avoid double counting. After subtracting Weight Maintenance expected calories, our apps create a Fitbit Active Calories record.
MyNetDiary and PlateAI do not create separate records for Fitbit workouts. Instead, MyNetDiary and PlateAI compare Total Calories calculated by Fitbit with your estimated calories for weight maintenance and records the difference as Fitbit Active Calories. Fitbit Active Calories is the number of calories you expended during the day beyond your Weight Maintenance Calories, which depend on your Physical Activity (PA) level. This way provides a more accurate accounting of your calories than importing workouts and daily steps into our app. Importing workouts as separate records will result in double-counting of your workouts.
Please see more details in How does Fitbit linking work and in Fitbit Zero Calories.