
| Developer | Apple |
| First Launch | April 24, 2015 |
| Initial Version | watchOS 1.x |
| Latest Stable Version | 4.2 |
| First Device | Apple Watch Series 1 |
| Working State | Current |
| Latest Flagship Device | Apple Watch Series 3 |
| Device Type Target | Smartwatch |
| Platforms | 32-bit ARM architecture ARMv7-A |
| Interface | Touchscreen, “Digital Crown” Dial |
| Programming Language Used / Written In | C, C++, Objective-C, Swift |
| OS Family | iOS |
| Kernel Type | Unix-like |
| Source Model | Closed (with open-source components) |
| License Type | Proprietary software, except for open-source components |
| Update Method | FOTA |
| Fitness and Health Monitoring | Yes, via Apple Health |
| App Store | Apple App Store |
| App Store Link | apple.com/lae/ios/app-store |
| App Extension | IPA |
| Multi Tasking | Yes |
| App Development Language | Swift, Objective C |
| Touch | Yes |
| Watchface | Customizable |
| Voice Command | Yes |
| Personal Assistant | Apple Siri |
| Smartphone Compatibility | iOS 9+ |
| Smartphone Companion App | Apple Watch App |