Hi
When comparing calorie data between devices and their apps, keep in mind that Apple Watch reports active energy / calories, whereas many other fitness apps report total energy (resting + active calories).
To help improve the accuracy of steps and other activity-related estimations made by Apple Watch, you can calibrate your watch:
To calibrate your watch, follow the instructions here:
Keep in mind also that Apple Watch aims to measure steps actually taken. It does not report on other types of activity by converting them into an equivalent number of steps taken.
For the best results from the Activity app in respect of tracking steps, try to allow the arm on which you wear your watch to swing naturally (both during general daily wear and, where appropriate, during workouts).
For the best performance from the heart rate sensor (data from which is also used when estimating calories), during workouts ensure that you wear your watch snugly on the top of your wrist. Apple suggests that you consider tightening the band before starting a workout and loosening it again afterwards:
Your heart rate. What it means, and where on Apple Watch you’ll find it. - Apple Support
Activity estimations also depend on your personal information. To check that this has been entered accurately and to update it over time:
On your iPhone, in the Watch app, go to: My Watch > Health > Edit (upper-right).
Your Move goal can be adjusted at any time:
- Open the Activity app on your watch:
- Tap on the Activity rings complication.
- Or go the Home screen (via a single press of the Digital Crown) and tap on the Activity app icon (coloured rings).
- From anywhere within the Activity app, press firmly on the screen > tap on Change Move Goal > adjust the target as desired.
More information:
Use the Workout app on your Apple Watch - Apple Support
Use the Activity app on your Apple Watch - Apple Support
