For the past five years, watchOS has evolved from an extension of iOS into a standalone operating system with its own App Store. The relatively new platform has seen multiple large revisions since its launch and each update brings Apple Watch closer to becoming an independent device.

● 31 Apple-designed watch faces
● Customizable complications
● Siri
● Workout tracking
● Sleep tracking
● On-device App Store
● Launched in 2015

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Apple announced the Apple Watch and watchOS months ahead of their eventual release. The September 2014 keynote included a "one more thing" moment, showing off the Apple Watch for the first time. The wearable finally launched in the spring of 2015 with an iPhone-dependent operating system.

watchOS is the operating system built for your wrist watchOS is the operating system built for your wrist

In the following years, hardware and software advances have allowed the Apple Watch to detach itself from the iPhone. Now users only need an iPhone to set it up for the first time, after which the device can perform tasks independent of a smartphone.

watchOS Features

Checking weather conditions in watchOS 7 Checking weather conditions in watchOS 7

Apple built watchOS as an extension of iOS in both look and feel. Tapping and swiping gestures make up most of the software's interactions. The Digital Crown adds a physical scroll-wheel function. Iconography and interface elements take on rounded shapes for better presentation and readability on the tiny display.

Apple Watch has matured into a sophisticated device, with fitness, health, and convenience driving the device's use case.


Track your exercise with the Workouts app Track your exercise with the Workouts app

First and foremost, Apple Watch is a fitness device. Among other metrics, the Apple Watch tracks users' active-calories burn, exercise hours, and stand hours.

watchOS includes automatic tracking features that can detect what a user is doing throughout the day. The accelerometers, heart-rate sensor, and barometer can work together to determine if a user is walking, running, or swimming.

Apple includes the Workout app to start specific workouts with different goals. The Activity app displays a user's metrics with a system of concentric rings. It also tracks Activity Challenge medals and lets you challenge your friends to workout competitions.

Third-party apps can tap into the Apple Watch's sensors to provide specialized workout and activity apps for things like yoga or guided five-minute workouts.

Apple Fitness+ provides Apple Watch owners with a home workout service Apple Fitness+ provides Apple Watch owners with a home workout service

In late 2020, Apple Fitness+ launched, providing Apple Watch owners with a home workout service. Designed to compete with services like Peloton, Apple Fitness+ streams a continually updated series of fitness videos from Apple's in-house instructors. It syncs with the Apple Watch, displaying user metrics onscreen.

Apple Fitness+ requires watchOS 7. It costs $9.99 per month and is also available as part of Apple One bundles.


Health tracking is a big part of watchOS Health tracking is a big part of watchOS

Apple didn't initially position health features as the Apple Watch's focus, but health quickly became the platform's cornerstone. Today, watchOS tracks various health metrics with the watch's sensors, trying to warn users of potential health issues as they arise.

The heart-rate sensor tracks a user's heart rate every five minutes when being worn and every minute of an active workout. If it senses a dangerous condition or abnormal heartbeat, it notifies users and asks them to seek medical attention.

Automatic fall detection uses algorithms to determine if a person has fallen abruptly while remaining motionless. If the feature is enabled and it senses that the user is unresponsive, the Apple Watch will call emergency services like 911 in the U.S.

Debuting in the Apple Watch Series 4, the built-in ECG lets you measure your heart electrical activity using the Digital Crown. If it detects an AFib, it will alert you to see a doctor for more advanced screening.

Apple Watch has been known to save lives on many occasions with its various alerts and features built into watchOS.


Customize watchOS with faces and complications Customize watchOS with faces and complications

Although Apple doesn't allow third-party watch faces on watchOS, you can get close using built-in customization features. The watch faces have small widgets visible called "complications" that can be changed to whatever the user wants.

Developers can build complications for their apps, which automatically populate the watch interface's complication picker. As of watchOS 7, users can display multiple complications from the same app on the same watch face.

iOS 14 and watchOS 7 both enable users to share their customized watch faces over iMessage. The feature prompts users to install any missing apps when clicking on a shared watch face. Apple is also planning on releasing editorialized content in the App Store that suggests specific watch face configurations.

The Apple Watch Series 5 and later have always-on displays, which will dim slightly when not in use, showing updated information on a slightly altered version of the user's watch face.

watchOS Releases

Through the years of releases, watchOS has seen multiple design changes and feature updates. The current operating system is vastly different than what was released in 2015, as Apple has learned what users want from the platform and changed it accordingly.

watchOS 7

Apple announced watchOS 7 at WWDC 2020 Apple announced watchOS 7 at WWDC 2020

Apple announced watchOS 7 at WWDC 2020. The update launched to the public in September.

The update is the first to allow multiple watch-face complications from the same app. It also adds watch-face sharing, which lets users send their customized watch faces to friends through iMessage. watchOS still doesn't support third-party watch faces.

watchOS 7 adds more a comprehensive sleep mode. When wearing the Apple Watch overnight, it will track basic stats like time asleep, heart rate, resting heart rate, and heart-rate variability.

The latest software also adds new workouts, including dance, Functional Strength Training, Core Training, and post-workout cool down. Cycling directions are also available in Apple Maps, alerting users of upcoming obstacles like stairs.

watchOS 7 can optionally remind you to wash your hands after returning home watchOS 7 can optionally remind you to wash your hands after returning home

In response to the coronavirus pandemic, Apple added a hand-washing timer. If the feature is turned on, the watch will alert users to wash their hands upon returning home. It will also start a timer automatically when it sense hand washing.

Alongside Apple's Translate app in iOS 14, the company added Siri translation support to the Apple Watch. Siri Shortcuts also now work natively on the watch, supporting both the Shortcuts Apple Watch app and complications.

The update added Family Setup, which lets parents set up an Apple Watch for children who don't have an iPhone. The feature only works with cellular Apple Watch models, as the watches of children without iPhones would otherwise have no way to stay connected away from Wi-Fi.

Apple's Memoji, which allows users to create custom avatars, now has a dedicated Apple Watch app. The app focuses on avatar creation. After making a Memoji avatar — either on the watch or a paired iPhone — it will populate as an option when messaging. Apple also added a Memoji watch face.

watchOS 6

watchOS 6 debuted an iPhone-independent App Store on the watch watchOS 6 debuted an iPhone-independent App Store on the watch

Released in September 2019, watchOS 6 added new features and made the Apple Watch more independent.

With this version, Apple built the App Store into watchOS. For the first time, this made it possible to discover and install new apps without a paired iPhone.

The update added Activity Trends in the Health app. These add context, attempting to educate users on what their data means and what they can do to improve.

watchOS 6 also added menstrual cycle tracking. Women can use the Apple Watch app and complication to track their periods. It will also display in the iOS Health app.

Apple prioritized hearing health in its 2019 update. Using the watch's microphone, the Noise app keeps tabs on environmental audio levels. It can alert users if they're exposing themselves to loud environments that could lead to hearing loss. The iPhone Health app also shows data from headphone audio levels.

watchOS 5

watchOS 5 added new health features, Podcasts, and Walkie-Talkie watchOS 5 added new health features, Podcasts, and Walkie-Talkie

Apple's 2018 watchOS update added new health and audio features.

One of the marquee additions was workout competitions. These allow multiple Apple Watch owners to challenge each other to complete customizable goals over a set time period.

Apple tweaked automatic workout detection in watchOS 5. Starting with this version, auto-detect will start a workout as soon as it detects a compatible workout. The update added yoga and hiking workouts as well.

Raise to Speak debuted in this firmware version. Compatible with Apple Watch Series 3 and later, Raise to Speak will invoke Siri without saying "Hey Siri" or pressing on the Digital Crown. Lifting the watch towards your mouth should trigger it. The feature had some kinks to work out at launch but has advanced to work more reliably in later updates.

The update added a Podcasts app to the Apple Watch. The app supports local storage and offline listening, so users can tune into their favorite podcasts without using a paired iPhone.

Apple's Walkie-Talkie app debuted with this 2018 update. The feature uses FaceTime Audio to establish an audio connection instantly, allowing paired users to talk with each other without having to accept a call.

This watchOS version also added third-party app support to the Siri watch face.

watchOS 4

watchOS 4 added the Siri watch face watchOS 4 added the Siri watch face

Apple's 2017 update, watchOS 4, added the Siri watch face and several new fitness features.

The Siri watch face uses Apple's AI to surface contextual content and notifications throughout the day. It supports info like upcoming appointments, weather, traffic on your commute, HomeKit scenes, or sunset and sunrise times. Tapping on an alert will give you more data. You can also twist the Digital Crown to scroll through the day's reminders and alerts.

The update added new fitness features, including high-intensity interval training (HIIT), a Workout app redesign, and Monthly Activity Challenges that award users with in-app medals. The update included new heart-rate measurements, including heart-rate variability (HRV). It also added the ability to chain workouts together in one session.

The 2017 version also added the option to view the home screen as a list instead of a radial grid. It also included a redesigned Apple Music app and Apple News and Radio apps for the first time.

watchOS 3

watchOS 3 arrived at WWDC 2016 watchOS 3 arrived at WWDC 2016
  • Released in September 2016
  • Dock has a favorite apps section
  • Dock now contains up to 10 apps
  • Switch watch faces with a swipe
  • Control Center toggled with swipe up
  • New faces include Minnie Mouse, Activity, and Numerals
  • Apple Watch app on iPhone gains watch face gallery
  • Share activity rings with friends
  • Quick start workouts with previous settings
  • Auto-pause workouts from lack of activity
  • Wheelchair workouts and tracking added
  • Breathe app added and alerts users regularly to breathe and meditate for a moment
  • Scribble keyboard lets users draw letters rather than type them on the small display
  • Emergency SOS will call emergency services and alert emergency contacts when the Side Button is held down
  • Home, Reminders, and Find My apps added

watchOS 2

watchOS 2 added Nightstand Mode and other new features watchOS 2 added Nightstand Mode and other new features
  • Released in September 2015
  • Overhauled experience with speed in mind
  • New watch faces include Time-lapse and Photo
  • Time Travel function (later removed) let users scroll the Digital Crown to view complications as they would appear over time
  • Nightstand mode shows the time and date when Apple Watch is charging vertically
  • Siri can control HomeKit devices, make FaceTime audio calls, and start a workout
  • Friends can have more than 12 friends with support for groups (Friends functionality was later removed)
  • Beats 1 Radio support
  • Reply to email using dictation

watchOS 1

Tim Cook revealing the first Apple Watch and watchOS 1 in September 2014 Tim Cook revealing the first Apple Watch and watchOS 1 in September 2014
  • Released with Apple Watch in Spring 2015
  • Nine watch faces included at launch
  • Twenty stock apps
  • Circular app icons on the home screen placed in a grid
  • Digital Crown navigation features
  • Digital Touch, heartbeat sharing, and app dock central to the experience

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