My Apple Watch fitness tracker stopped counting active calories correctly since update. Has anyone had the same problem?

Hey there Kiki-Kik,

Thanks for reaching out to the Apple Support Communities. For the best steps that can help with getting the most accurate measurements when tracking your activity, check out this link here: Get the most accurate measurements using your Apple Watch - Apple Support

1. Keep your personal information up to date

Your Apple Watch uses your personal information – such as your height, weight, gender and age – to calculate how many calories you burn and other daily activity metrics. 

To update your personal information, open the Watch app on your iPhone. Tap the My Watch tab, then tap Health > Health Details. Tap Edit, then tap the item you want to change.

2. Make sure you earn Move and Exercise credit 

Every full minute of movement that equals or exceeds the intensity of a brisk walk will count towards your daily Exercise and Move goals. With Apple Watch Series 3 or later, your cardio fitness levels are used to determine what is brisk for you. For wheelchair users, this is measured in brisk pushes. Any activity below this level will only count towards your daily Move goal.

To make sure you earn Exercise credit during walks, allow the arm you're wearing your Apple Watch on to swing naturally. For example, while walking your pet, let the arm with your watch on swing freely and hold the lead in your other hand.

If you need both hands while walking, for example to push a pushchair, you can still earn Exercise credit with the Workout app. Open the app on your Apple Watch and tap Outdoor Walk. The Activity app relies on arm motion and an accelerometer to track movement, but the Workout app can use the accelerometer, the heart rate sensor and GPS.

3. Make sure Wrist Detection is turned on

If Wrist Detection is turned off, you won't receive Stand notifications, and your Apple Watch can't track your Stand progress. Background heart rate readings (such as resting and walking rates) won't be taken if Wrist Detection is turned off. 

To check the setting, open the Watch app on your iPhone. Tap the My Watch tab, then tap Passcode. Make sure Wrist Detection is turned on.

Resting and walking heart rates are available only on Apple Watch Series 1 or later.

4. Check the fit

Wearing Apple Watch with the right fit – not too tight, not too loose and with room for your skin to breathe – will keep you comfortable and allow the sensors do their job. 

You may want to tighten your Apple Watch band for workouts, then loosen it when you've finished. In addition, the sensors will only work if you wear your Apple Watch on the top of your wrist.

Find out more about wearing your Apple Watch

5. Get the most accurate heart rate measurement

To get the most accurate heart rate measurement when you're using Workout, make sure your Apple Watch fits snugly on top of your wrist. The heart rate sensor should stay close to your skin. Find out more about the accuracy and limitations of the heart rate sensor.

If you have an Apple Watch Series 3 or later, track your cardio fitness levels to measure how hard your heart is working during an outdoor walk, run or hike in the Workout app.

If you've turned off Heart Rate in Privacy settings, you also won't get a heart rate measurement. To see if Heart Rate is off or on, open the Watch app on your iPhone, then tap Privacy. 

6. Choose the best workout

When you're using the Workout app, choose the option that best matches what you're doing. For example, if you're running on a treadmill, choose Indoor Run. If you're doing a workout that isn't listed, tap Add Workout and choose the workout that best matches the activity you're doing.

Find out more about each workout.

7. Calibrate your Apple Watch

Calibrate your Apple Watch to improve the accuracy of your distance, pace and calorie measurements. Calibrating your watch can also help it learn your fitness level and stride.

Find out how to calibrate your Apple Watch

If still running into issues after going through the steps above, reach out to Apple Support directly from this link here: Get Support - Apple

Take care!