watchOS 4.3 to 5.0 API Differences
Accelerate
AVFoundation
ClockKit
CloudKit
CommonCrypto
Contacts
CoreAudio
CoreBluetooth
CoreData
CoreFoundation
CoreGraphics
CoreLocation
CoreML
CoreMotion
CoreServices
(Added)
CoreText
CoreVideo
Dispatch
EventKit
Foundation
GameKit
HealthKit
HomeKit
ImageIO
Intents
MapKit
MediaPlayer
(Added)
MobileCoreServices
NaturalLanguage
(Added)
Objective-C
os
PassKit
SceneKit
Security
SpriteKit
UIKit
UserNotifications
WatchConnectivity
WatchKit