WatchOS - Wikipedia WatchOS watchOS Developer Apple Inc. Written in C++ Objective - C Swift OS family Unix - like iOS Working state Current Source model Closed ( with open - source components ) Initial release April 24, 2015 ; 3 years ago ( 2015 - 04 - 24 ) Latest release 4.3. 2 ( 15U70 ) ( July 9, 2018 ; 34 days ago ( 2018 - 07 - 09 ) ) ( ± ) Latest preview 5.0 beta 6 ( 16R5340g ) ( August 6, 2018 ; 6 days ago ( 2018 - 08 - 06 ) ) ( ± ) Marketing target Smartwatch Update method FOTA ( via iPhone 5 + running iOS 8.2 + ) Platforms 32 - bit ARM architecture ARMv7 - A License Proprietary software except for open - source components Official website www.apple.com/watchos Support status Supported watchOS is the mobile operating system of the Apple Watch, developed by Apple Inc. It is based on the iOS operating system and has many similar features. It was released on April 24, 2015, along with the Apple Watch, the only device that runs watchOS. Its API is called WatchKit. The second version, watchOS 2, included support for native third - party apps and other improvements, and was released on September 21, 2015. The third version, watchOS 3, was released on September 13, 2016, emphasizing better performance and including new watch faces and stock apps. The fourth version, watchOS 4, was released on September 19, 2017. The fifth version, watchOS 5, was announced on June 4, 2018, adding more third - party support and new workouts, along with the `` Walkie - Talkie '' feature. Contents 1 Interface overview 2 HealthKit 3 Version history 3.1 watchOS 1. x 3.2 watchOS 2. x 3.3 watchOS 3. x 3.4 watchOS 4. x 3.5 watchOS 5. x 4 See also 5 References 6 External links Interface overview The home screen ( rendered by and also known as `` Carousel '' ) is composed of circular application icons, which can be zoomed in and out with the Digital Crown and dragged and launched by touching the display. Many of the apps are miniaturized, simplified versions of their iOS counterparts. Prior to watchOS 3, Glances provided fast access to a summarized view of the most popular native or third party applications used on Apple Watch. The Glances view was opened with a swipe up gesture from the watch face screen. With watchOS 3, Glances has been replaced by a redesigned Control Center - much like the one in iOS. The friends menu, invoked with the side button, now acts as a dedicated dock for apps. Different actions and options appear depending on if the user taps or deep presses which an Apple Watch detects with its pressure - sensitive ( Force Touch ) Display. HealthKit For several years now, Apple has been developing its HealthKit product in a bid to change the way people interact with their devices. There is also a thinly veiled attempt to penetrate the lucrative healthcare and wellness industry, which many observers believe to hold huge growth opportunity for Apple. This was confirmed by Jony Ive, Apple 's chief designer, in an interview. He said that health was a crucial element in the Apple Watch since the day of its inception and that the developmental trajectory of the hardware and the WatchOS were geared towards health - based capabilities. Ive pointed out that that one of the primary apps that shipped with the first WatchOS allowed users to track and communicate as well as encourage them to move, exercise, and stand. He said : Many of us have our phones with us all the time, but they are n't connected to you. Imagine having something this powerful with you at all times, and what opportunities that might present to the user. The opportunity is phenomenal. Particularly when ( you ) do n't understand just where we are today in terms of technology and capability, but where we are headed. One of the most recent updates to the watchOS included applications that do not only keep users active but also diagnose illnesses. For example, there is the app called DeepHeart, a deep learning network that can detect atrial fibrillation, hypertension, sleep apnea, and diabetes. It taps the HealthKit platform to collect data, particularly those collected by the Apple Watch 's heart sensor. Version history Legend : Obsolete Current Beta WatchOS 1 x show Table of versions : watchOS 1. x - Apple Watch watchOS version iOS version based on Build Release date Features 1.0 8.2 12S507 April 24, 2015 ; 3 years ago ( 2015 - 04 - 24 ) Initial release on Apple Watch. UI Free floating Circular app icons in home screen. Zoom in with Digital Crown. 9 watch faces : Chronograph Color Modular Utility Mickey Mouse Simple, Motion Solar Astronomy 20 stock apps : Activity. Alarm. Calendar. Camera Remote. Mail. Maps. Messages. Music. Passbook. Phone. Photos. Remote. Settings. Siri. Stocks. Stopwatch. Timer. Weather. Workout. World Clock. 1.0. 1 8.3 12S632 May 19, 2015 ; 3 years ago ( 2015 - 05 - 19 ) Display support for new Emoji characters. Notification screen UI tweaks. Improved performance : Free floating Circular app icons in home screen. Zoom in with Digital Crown. Siri. Measuring stand activity. Calculating calories for indoor cycling and rowing workouts. Distance and pace during outdoor walk and run. Accessibility. Third party apps. Wrist Raise ( more sensitive to real - life wrist raises ). Additional language support : Brazilian Portuguese. Danish. Dutch. Swedish. Russian. Thai. Turkish. Security fixes WatchOS 2 x show Table of versions : watchOS 2. x - Apple Watch watchOS version iOS version based on Build Release date Features 2.0 9.0 13S344 September 21, 2015 ; 2 years ago ( 2015 - 09 - 21 ) Nightstand Mode Allows the Apple Watch to act as a nightstand / alarm clock when the watch is charging at night and is turned horizontally while being placed on a table or other surface. Users can look at the time just by tapping the Digital Crown. When an alarm comes on, the Digital Crown can be used to snooze the alarm and the side button can be used to dismiss it. New Watch Faces and timekeeping features New 24 Hour Time - Lapse videos of Hong Kong, London, Mack Lake, New York, Shanghai, and Paris. These watch faces allow users to set the backgrounds of different cities as the user 's watch face. As the day moves on, the watch face represents a different time of day in the city. For example, if it is nighttime, the watch will show a skyline of the city at night. Users can also set a particular photo or their entire photo gallery as the watch face, including support for Live Photos. Time Travel A new mode called Time Travel is available in which a user can use the digital crown to scroll forward / backward in time. This allows the user to see upcoming or past calendar events and alarms they have set. 9 new colors to customize watch face, and a new multicolor Modular face. Third party complications. Complications will be available from third - party developers which allow users to do things such as check flight status or charging level of electric cars Siri improvements Start a specific workout, get transit directions, ask to see a glance, looking up a word in the dictionary, and calculating a tip. Support for FaceTime audio calling and replying to email Support for HomeKit to control supported devices in your home using Siri New support for Austria, Belgium ( French and Dutch ), and Norway Activity and Workout improvements Workouts from third party apps on the Watch can be included in your Activity rings Activity rings, workouts, and achievements can be shared from the Activity app on iPhone Interactive achievements On - demand weekly summary Mute Activity notifications for one day Workouts saved automatically Apple Pay and Wallet improvements Support for Discover cards Support for rewards cards and store credit and debit cards Add passes to Wallet directly from third party apps on your Watch Wallet app replaces Passbook. Adds support in the UK. Friends and Digital Touch improvements Add more than 12 Friends directly from Apple Watch Multiple Friends ' groups that you can name Send sketches using multiple colors. While drawing, a user can select from 7 different colors. New options for animated emoji Maps improvements Transit view, showing transit lines, stations and intermodal connections in select major cities View the list of directions for your current View station placards with departure information Music improvements New Beats 1 button to start playing the 24 / 7 radio station New Quick Play button to play a variety of songs from Apple Music Other improvements Reply to emails using dictation, emoji, or smart replies customized specifically for email Make and receive calls using FaceTime audio Support for Wi - Fi calling without iPhone in proximity on participating carriers Activation Lock prevents anyone from activating your Apple Watch without your Apple ID and password New developer capabilities including Native SDK to build faster and more powerful apps running natively on Apple Watch Access to accelerometer to more granularly track your motion Access to heart rate sensor for use during a workout Access to microphone and speaker to record and play audio Access to the Taptic Engine with 8 different types of Haptic feedback Access to the Digital Crown for more precise controls Ability to play video directly on Apple Watch Support for running apps without iPhone in proximity, including access to networking capabilities when connected to known Wi - Fi networks Complications on the watch face Workouts from apps can be counted towards Activity rings Workouts from apps can be included in Activity app on iPhone New support for system language in English ( India ), Finnish, Indonesian, Norwegian, and Polish New support for dictation in Dutch ( Belgium ), English ( Ireland, Philippines, South Africa ), French ( Belgium ), German ( Austria ), Spanish ( Chile, Colombia ) New support for smart replies in Traditional Chinese ( Hong Kong, Taiwan ), Danish, Dutch, English ( New Zealand, Singapore ), Japanese, Korean, Swedish, Thai 2.0. 1 9.1 13S428 October 21, 2015 ; 2 years ago ( 2015 - 10 - 21 ) Update contains new emoji characters and performance improvements. Fixes an issue that could cause software updates to stall Fixes issues that were impacting battery performance Resolves an issue that prevented a managed iPhone from syncing iOS Calendar events to Apple Watch Addresses an issue that could prevent location information from properly updating Fixes an issue that could cause Digital Touch to send from an email address instead of a phone number Addresses an issue that could cause instability when using a Live Photo as a watch face Resolves an issue that allows the sensors to stay on indefinitely when using Siri to measure heart rate 9.2 13S661 December 8, 2015 ; 2 years ago ( 2015 - 12 - 08 ) Added support for system language in Arabic, Czech, Greek, Hebrew, Hungarian, Malay, Portuguese ( Portugal ), and Vietnamese Added support for Right - to - Left user interface Added ability to switch between Latin and Hindi numerals for Arabic Added a new complication for Islamic and Hebrew Calendars Added support for Siri and dictation in Arabic ( Saudi Arabia, United Arab Emirates ) Added support for dictation in English ( Malaysia ), Czech, Greek, Hebrew, Hungarian, Portuguese ( Portugal ), and Vietnamese Resolved an issue that could prevent events from updating in the Calendar complication Fixed an issue that prevent the time from displaying in Power Reserve mode Addressed issues that could prevent third party apps from launching Fixed an issue that could prevent third - party app icons from displaying correctly Fixed an issue that could cause instability when changing the system language 9.3 13V144 March 21, 2016 ; 2 years ago ( 2016 - 03 - 21 ) Adds support for pairing multiple Apple Watches to one iPhone Adds Nearby in Maps to browse for places around you by category, including Food, Shopping, and more Adds support for system language in Catalan, Croatian, Slovak, Romanian, and Ukrainian Adds support for dictation in Catalan, Croatian, Slovak, Romanian, Ukrainian, and English ( Saudi Arabia, UAE, and Indonesia ) Adds support for Siri in Malay, Finnish, and Hebrew Increases frequency of background heart rate measurements when you are stationary 2.2. 1 9.3. 2 13V420 May 16, 2016 ; 2 years ago ( 2016 - 05 - 16 ) General performance and stability improvements. 2.2. 2 9.3. 3 13V604 July 18, 2016 ; 2 years ago ( 2016 - 07 - 18 ) General performance and stability improvements. WatchOS 3 x show Table of versions : watchOS 3. x - Apple Watch watchOS version iOS version based on Build Release date Features 3.0 10.0 14S326 September 13, 2016 ; 22 months ago ( 2016 - 09 - 13 ) Initial Release on Apple Watch Series 1 ( Dual - Core ) and Apple Watch Series 2 ( Dual - Core ) Performance and Navigation Provides faster access to apps by creating a dock which can accommodate up to 10 apps which will keep running in the background for instant access. The dock can be invoked using the side button next to the digital crown. Control Center Provides support for an all - new Control Center which can be invoked by sliding up from the bottom of the screen. New Watch Faces. Adds new watch faces and adds support for switching between them by swiping left / right from the edge of the watch screen. Activity / Workouts Adds support for sharing activity with friends using iMessage or other messaging platforms. Adds support for tracking movement of people in wheelchairs, displaying a `` Time to Roll '' reminder rather than `` Time to Walk '' as watchOS 2 did. It is now possible to see 5 different workout metrics all at once. These include distance, pace, active calories, heart rate, and elapsed time. Adds support for pausing a workout when stopped at a stoplight. Support for a new Breathe app which will guide users through a set of deep breaths to help them be more relaxed. Messages Adds support for the all - new messaging app which will also be present in iOS 10. This includes features such as setting off fireworks, sticking stickers, sharing a secret with invisible ink, or replying in your own handwriting or scribbling letters on the display and letting Apple Watch turn it into text. HomeKit Adds support for an all - new Home app which is a centralized place to control all HomeKit accessories. SOS Adds support for a feature called SOS which allows a person to place emergency calls by holding the side button for 5 seconds. Mac Unlock Alongside macOS Sierra, the Apple Watch running watchOS 3 can now allow users to bypass the unlock screen on their Mac by allowing the Mac to detect their Apple Watch and unlock the Mac. 3.1 10.1 14S471 October 24, 2016 ; 21 months ago ( 2016 - 10 - 24 ) New option to replay bubble and full screen effects in Messages Messages effects can play with Reduce Motion enabled Fixes an issue that could cause the notification for Timer complete to be delivered twice Resolves an issue that could prevent Apple Watch Series 2 from fully charging Resolves an issue where Activity rings may disappear from the watch face Fixes an issue that prevented Force Touch options from appearing in some third - party apps. 3.1. 1 10.2 14S883 December 12, 2016 ; 19 months ago ( 2016 - 12 - 12 ) Update withdrawn due to reports of Apple Watches no longer working after the update Fixes an issue that could prevent contact names from appearing in the Messages app and notifications Fixes an issue that could impact ability to respond to notifications Resolves an issue where the Stocks complication may not update on the watch face Fixes an issue that may prevent the Activity rings from displaying on the Activity watch faces Fixes an issue that prevented the dials on an analog watch face from appearing after changing the temperature unit in the Weather app Resolves an issue that could cause the Maps app to stay launched after navigation has ended Resolves an issue where the incorrect date could be displayed in the Calendar app month view 3.1. 3 10.2. 1 14S960 January 23, 2017 ; 18 months ago ( 2017 - 01 - 23 ) General performance and stability improvements 3.2 10.3 14V249 March 27, 2017 ; 16 months ago ( 2017 - 03 - 27 ) Theater mode to temporarily disable the raise to wake feature SiriKit to allow third party apps access to Siri Find My iPhone now supports Location and Play Sound for AirPods. Filesystem updated to APFS. 3.2. 2 10.3. 2 14V485 May 15, 2017 ; 14 months ago ( 2017 - 05 - 15 ) Bug fixes. 3.2. 3 10.3. 3 14V753 July 19, 2017 ; 12 months ago ( 2017 - 07 - 19 ) Bug fixes. WatchOS 4 x hide Table of versions : watchOS 4. x - Apple Watch watchOS version iOS version based on Build Release date Features 4.0 11.0 15R372 September 19, 2017 ; 10 months ago ( 2017 - 09 - 19 ) Initial Release on Apple Watch Series 3 ( Dual - Core ) Watch Faces New Siri face that intelligently updates information based on time of day, location, and daily routines New animated Toy Story faces featuring Woody, Buzz Lightyear, Jessie and more New Kaleidoscope face that turns static images into symmetrical, intertwining patterns New complications for Siri, News, Heart Rate, Now Playing, and Messages Activity Intelligent and personalized notifications to help you close your Activity rings each day Monthly challenges based on the previous month 's activity levels New full screen animations to celebrate important milestones including earning an achievement and closing your rings Replies to activity sharing notifications now include workout metrics Workout Redesigned app for quick starts and helpful workout type graphics New High Intensity Interval Training ( HIIT ) workout with custom motion and heart rate algorithms for more accurate calorie tracking Support for multiple workout types in one workout session Auto sets for Pool Swim workouts with distance for each stroke type and pace for each set, automatically adjusted for rest time Ability to automatically start a synced music playlist when you start a workout on Apple Watch Series 1 and later Access to music controls directly in the Workout app during a workout session Option for Do Not Disturb to be automatically turned on during workouts Heart Rate New visual graph showing all - day heart rate New heart rate measurements and visual graphs for resting rate ( Apple Watch Series 1 and later ), walking average, workout average and high, recovery time, and sessions in the Breathe app Option to be notified if your heart rate rises above a specified threshold while you appeared to be inactive for a 10 - minute period ( Apple Watch Series 1 and later ) Current and historical details of heart rate data in the Health app on iPhone, including new Heart Rate Variability ( HRV ) and VO2 Max data types Music Redesigned app for easy scrolling through album art Ability to sync multiple playlists for local playback with bluetooth headphones Automatically sync curated playlists from Apple Music including Heavy Rotation, My New Music Mix, and My Favorites Mix Other features and improvements News app with summaries of Top Stories and save for later to read on iPhone Flashlight and Safety Light in Control Center Vertical scrolling through recently used apps in the Dock App home screen available in an alphabetical list view Mail compose and swipe gestures Dialer pad in the Phone app Conflicts displayed in Calendar invites Scribble support for German Sub-minute and repeating timers Suggested and recent locations in Maps Contacts and locations in smart replies 4.0. 1 11.0 15R654 October 4, 2017 ; 10 months ago ( 2017 - 10 - 04 ) Apple Watch Series 3 ( GPS + Cellular ) only Fixes issues that were causing Apple Watch to join unauthenticated ( captive ) Wi - Fi networks, such as those often found in public places like coffee shops and hotels, which direct the user to a web page before the network can be accessed. 4.1 11.1 15R846 October 31, 2017 ; 9 months ago ( 2017 - 10 - 31 ) Over 70 new emoji characters including new food types, animals, mythical creatures, clothing options, more expressive smiley faces, gender - neutral characters and more Stream music on Apple Watch Series 3 with Apple Music or iCloud Music Library Listen to live radio on Beats 1, custom stations and expert - curated stations with the new Radio app on Apple Watch Series 3 Use Siri to find, discover and play songs, playlists or albums Sync fitness data with GymKit - enabled treadmills, ellipticals, stair steppers and indoor bikes for more accurate distance, pace and energy burn metrics Ability to disconnect from a Wi - Fi network in Control Center for Apple Watch Series 3 ( GPS + Cellular ) Fixes an issue for Apple Watch Series 1 and later where Heart Rate notifications were delivered when the feature was not enabled Fixes an issue where some users did not receive Stand Reminders Resolves an issue where the current stand hour indicator did not appear for some users Resolves an issue that caused haptics to not be delivered for silent alarms Addresses an issue that prevented Apple Watch ( 1st generation ) from charging for some users Resolves an issue where the Sunrise and Sunset complication would sometimes not appear Restores Mandarin as the default dictation language for China 4.2 11.2 15S102 December 5, 2017 ; 8 months ago ( 2017 - 12 - 05 ) Send, request, and receive money from friends and family with Apple Pay Cash in Messages or by asking Siri ( US only ) Adds support for HomeKit sprinklers and faucets in Home Adds support for a new workout type for third - party apps to track distance, average speed, number of runs, and elevation descended for downhill snow sports with Apple Watch Series 3 Resolves an issue where Apple Watch would sometimes restart when asking Siri about the weather Fixes an issue where scrolling was disabled in Heart Rate for some users Resolves an issue that prevented simultaneous timers or alarms from being dismissed independently 4.2. 2 11.2 15S542 January 23, 2018 ; 6 months ago ( 2018 - 01 - 23 ) This update includes improvements and bug fixes. 4.2. 3 11.2 15S600b February 19, 2018 ; 5 months ago ( 2018 - 02 - 19 ) Fixes an issue where using certain character sequences could cause apps to crash. 4.3 11.3 15T212 March 29, 2018 ; 4 months ago ( 2018 - 03 - 29 ) Control volume and playback on HomePod from your Apple Watch Restores ability to control music on iPhone Use any orientation for Nightstand charging mode Siri watch face now shows progress towards closing Activity rings and when new songs are added to Apple Music mixes Resolves an issue where Activity achievements were incorrectly awarded for some users Fixes an issue where Siri music commands were not working for some audio devices 4.3. 1 11.4 15T567 May 29, 2018 ; 2 months ago ( 2018 - 05 - 29 ) Fixes an issue which caused Apple Watch to sometimes remain at the Apple Logo during startup for some users. Added Pride Watch Face to coding, became usable during WWDC2018 on 6 / 4 / 2018 4.3. 2 11.4. 1 15U70 July 9, 2018 ; 34 days ago ( 2018 - 07 - 09 ) Final release supported on Apple Watch ( 1st generation ) WatchOS 5 x This is the first version of watchOS to not support the first generation Apple Watch. hide Table of versions : watchOS 5. x - Apple Watch watchOS version iOS version based on Build Release date Features 5.0 beta 6 12.0 developer beta 6 16R5340g August 6, 2018 ; 6 days ago ( 2018 - 08 - 06 ) Watch Faces Third - party content on Siri face Workout Activity Competitions Auto - Workout Detection Ability to track cadence ( steps per minute ), as well as a pace alarm for outdoor runs to help users keep up with their target pace Added Yoga and Hiking workouts Other features and improvements Notifications are improved, with interactive controls available from within them for third - party apps. Student ID Cards Podcasts Walkie - Talkie Web - view for links See also Other operating systems developed by Apple Inc. iOS tvOS macOS Other competing platforms Wear OS -- Google 's Android - based counterpart Pebble OS References Jump up ^ Juli Clover ( July 9, 2018 ). `` Apple Releases New watchOS 4.3. 2 Software for Apple Watch ''. MacRumors. Retrieved July 9, 2018. Jump up ^ `` watchOS 4.3. 2 ( 15U70 ) - Releases - Apple Developer ''. Apple Developer. Apple Inc. July 9, 2018. Retrieved July 9, 2018. Jump up ^ Juli Clover ( August 6, 2018 ). `` Apple Seeds Sixth Beta of New watchOS 5 Operating System to Developers ''. MacRumors. Retrieved August 6, 2018. Jump up ^ `` watchOS 5 beta 6 ( 16R5340g ) - Releases - Apple Developer ''. developer.apple.com. August 6, 2018. Retrieved August 6, 2018. ^ Jump up to : `` Apple Watch runs ' most ' of iOS 8.2, may use A5 - equivalent processor ''. AppleInsider. Retrieved April 25, 2015. Jump up ^ `` Apple announces watchOS 2 with third - party Apple Watch apps, new Timepieces, video playback, much more ''. 9to5Mac. Retrieved June 8, 2015. Jump up ^ `` watchOS 2 final version released for Apple Watch users ''. Retrieved September 21, 2015. Jump up ^ `` Apple 's watch OS 2 is now live following bug delay - CNET ''. CNET. Retrieved September 23, 2015. Jump up ^ `` watchOS 5 adds powerful activity and communications features to Apple Watch ''. Apple Newsroom ( Press release ). Retrieved 2018 - 06 - 05. Jump up ^ `` How To Use and Organize Apple Watch Glances ''. iPhoneTricks. Retrieved April 27, 2015. Jump up ^ `` Apple Watch -- Technology ''. Apple. Retrieved December 26, 2014. Jump up ^ `` Apple Is Going After The Health Care Industry, Starting With Personal Health Data ''. CB Insights Research. 2017 - 09 - 20. Retrieved 2018 - 05 - 28. Jump up ^ Phelan, David. `` Apple Watch Secrets Revealed By Jony Ive, Health A Big Focus ''. Forbes. Retrieved 2018 - 05 - 28. Jump up ^ Phelan, 2018. Jump up ^ `` Apple Watch 's heart rate sensor can detect diabetes, Cardiogram study finds ''. Macworld. Retrieved 2018 - 05 - 28. ^ Jump up to : `` Apple Watch Firmware ''. Retrieved May 19, 2015. Jump up ^ `` Apple Watch Timekeeping ''. Retrieved March 9, 2015. Jump up ^ `` Apple Watch Built - in Apps ''. Retrieved June 29, 2015. Jump up ^ `` watchOS 1.01 information ''. Apple Inc. Retrieved May 24, 2016. Jump up ^ `` About the security content of watch OS 1.0. 1 - Apple Support ''. Apple. Retrieved June 29, 2015. ^ Jump up to : `` watchOS 2. x information ''. Apple Inc. Retrieved May 24, 2016. Jump up ^ `` Apple has temporarily pulled the watchOS 3.1. 1 update due to reports of it bricking devices ''. 9to5Mac. Retrieved December 14, 2016. External links watchOS -- official site iOS and iOS - based products History Outline Hardware Apple TV 2nd 3rd iPad 1st 3rd 4th Air 1st 2017 2018 iPad Mini 1st iPad Pro 1st 2nd iPhone 1st 3G 3GS 4S 5 5C 5S 6 & 6 Plus 6S & 6S Plus SE 7 & 7 Plus 8 & 8 Plus X iPod Touch 1st 2nd 3rd 4th 5th 6th Software AirDrop AirPlay AirPrint CarPlay Cocoa Touch Control Center Core Animation HomeKit iTunes iOS 5 6 7 8 9 10 11 12 All Night Shift Notification Center SDK Siri Spotlight SpringBoard VoiceOver WebKit Bundled apps Books Calendar Clock Contacts FaceTime Files Find My Friends Find My iPhone Health Home Mail Maps Messages Music News Notes Photos Reminders Safari TV Videos Wallet Weather Watch Measure Discontinued Newsstand Apple apps AirPort Utility Clips iLife GarageBand iMovie iWork Keynote Numbers Pages Logic Remote Remote Discontinued Beats Music Cards iPhoto Nike + iPod Services Apple Pay App Store Game Center iBookstore iCloud iMessage iTunes Connect iTunes Store Multitasking Push Notifications TestFlight Discontinued iAd iTunes Radio MobileMe Other 300 - page bill Apple mobile application processors FairPlay Free and open - source iOS applications Games History of iPhone iFund Jailbreaking Metal Swift WWDC Darwin - derived operating systems History Pre-Darwin Unix BSD Mach NeXTSTEP OpenStep GNUstep Rhapsody Macintosh Mac OS X / OS X / macOS ( History ) Mac OS X Server Mac OS X Server 1.0 ( Hera / Rhapsody ) 10.0 ( Cheetah ) 10.1 ( Puma ) 10.2 ( Jaguar ) 10.3 ( Panther ) 10.4 ( Tiger ) 10.5 Leopard Server 10.6 Snow Leopard Server Mac OS X Public Beta ( Kodiak ) 10.0 ( Cheetah ) 10.1 ( Puma ) 10.2 ( Jaguar ) 10.3 Panther 10.4 Tiger 10.5 Leopard 10.6 Snow Leopard 10.7 Lion OS X 10.8 Mountain Lion 10.9 Mavericks 10.10 Yosemite 10.11 El Capitan macOS 10.12 Sierra 10.13 High Sierra 10.14 Mojave Apple TV Apple TV Software Derived from Mac OS X 10.4 Tiger : 1 Derived from iOS 4 - 8 : 4 5 6 7 tvOS Derived from iOS 9 - 11 : 9 10 11 12 iPhone / iPod Touch / iPad iPhone OS / iOS Derived from `` OS X '' : iPhone OS 1 iOS 4 5 6 7 8 9 10 11 12 Apple Watch watchOS Derived from iOS 8 - 11 : 1 5 HomePod audioOS Derived from iOS 11 : 11 Others OpenDarwin MacPorts / DarwinPorts PureDarwin macOS version history Server iOS version history watchOS version history tvOS version history audioOS version history Operating systems by Apple Inc. 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Question: what is the latest os for apple watch
Answer: 4.3.2