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Hello all! Unlike Steps and Distance is QuantityType so I can use HKStatisticsCollectionQuery and set options to filter them like below options: [HKStatisticsOptions.separateBySource, .cumulativeSum] Sleep is CategoryType so I can only use HKSampleQuery to get data like code below: func getHealthKitSleep() { 				let healthStore = HKHealthStore() 				let sortDescriptor = NSSortDescriptor(key: HKSampleSortIdentifierEndDate, ascending: false) 				// Get all samples from the last 24 hours 				let endDate = Date() 				let startDate = endDate.addingTimeInterval(-1.0 * 60.0 * 60.0 * 24.0) 				let predicate = HKQuery.predicateForSamples(withStart: startDate, end: endDate, options: []) 				// Sleep query 				let sleepQuery = HKSampleQuery( 						sampleType: HKObjectType.categoryType(forIdentifier: HKCategoryTypeIdentifier.sleepAnalysis)!, 						predicate: predicate, 						limit: 0, 						sortDescriptors: [sortDescriptor]){ (query, results, error) -> Void in 								if error != nil {return} 								// Sum the sleep time 								var minutesSleepAggr = 0.0 								if let result = results { 										for item in result { 												if let sample = item as? HKCategorySample { 														if sample.value == HKCategoryValueSleepAnalysis.asleep.rawValue && sample.startDate >= startDate { 																let sleepTime = sample.endDate.timeIntervalSince(sample.startDate) 																let minutesInAnHour = 60.0 																let minutesBetweenDates = sleepTime / minutesInAnHour 																minutesSleepAggr += minutesBetweenDates 														} 												} 										} 										self.sleep = Double(String(format: "%.1f", minutesSleepAggr / 60))! 										print("HOURS: \(String(describing: self.sleep))") 								} 				} 				// Execute our query 				healthStore.execute(sleepQuery) 		} This works great if the user has only one sleep app as the source for the data. The problem is if the user is using 2 sleep apps, for example, as sources, the data will be doubled. I just want show sleep data like HealthApp when user change data source priority, is there some ways to do it.