Wellness sources may differ in how they calculate calories data. "Activities only" indicates that calories are the result of detected activities performed in the period. "Activity + BMR" indicates a combination calories expended via a user's activity and their BMR. "Calorie intake" indicates the sum calories of food consumed. 

Activity only

• Garmin
• MapMyFitness
• MyFitnessPal
• Moves
• Runkeeper
• Strava (calories data is only available when a user performs a bike ride)
• Vitadock 

Activity + BMR

• Fitbit
• Azumio
• Healthkit
• iHealth
• Jawbone
• Misfit
• Google Fit (BMR is included if the end user configured for it accordingly on their device)