<Table> watchOS <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Developer </Th> <Td> Apple Inc . </Td> </Tr> <Tr> <Th> Written in </Th> <Td> <Ul> <Li> </Li> <Li> C++ </Li> <Li> Objective - C </Li> <Li> Swift </Li> </Ul> </Td> </Tr> <Tr> <Th> OS family </Th> <Td> <Ul> <Li> Unix - like </Li> <Li> iOS </Li> </Ul> </Td> </Tr> <Tr> <Th> Working state </Th> <Td> Current </Td> </Tr> <Tr> <Th> Source model </Th> <Td> Closed (with open - source components) </Td> </Tr> <Tr> <Th> Initial release </Th> <Td> April 24, 2015; 3 years ago (2015 - 04 - 24) </Td> </Tr> <Tr> <Th> Latest release </Th> <Td> 4.3. 2 (15U70) (July 9, 2018; 34 days ago (2018 - 07 - 09)) (±) </Td> </Tr> <Tr> <Th> Latest preview </Th> <Td> 5.0 beta 6 (16R5340g) (August 6, 2018; 6 days ago (2018 - 08 - 06)) (±) </Td> </Tr> <Tr> <Th> Marketing target </Th> <Td> Smartwatch </Td> </Tr> <Tr> <Th> Update method </Th> <Td> FOTA (via iPhone 5 + running iOS 8.2 +) </Td> </Tr> <Tr> <Th> Platforms </Th> <Td> <Ul> <Li> 32 - bit ARM architecture </Li> <Li> ARMv7 - A </Li> </Ul> </Td> </Tr> <Tr> <Th> License </Th> <Td> Proprietary software except for open - source components </Td> </Tr> <Tr> <Th> Official website </Th> <Td> www.apple.com/watchos </Td> </Tr> <Tr> <Th_colspan="2"> Support status </Th> </Tr> <Tr> <Td_colspan="2"> Supported </Td> </Tr> </Table> <Tr> <Th> Developer </Th> <Td> Apple Inc . </Td> </Tr>

What is the latest os for apple watch