<P> iOS is a mobile operating system, developed by Apple Inc. for iPhone, iPad, and iPod Touch . Updates for iOS are released through the iTunes software, and, since iOS 5, via over-the - air software updates . With the announcement of iOS 5.0 on June 6, 2011, a USB connection to iTunes was no longer needed to activate iOS devices; data synchronization can happen automatically and wirelessly through Apple's iCloud service . Major new iOS releases are announced yearly during the Apple Worldwide Developers Conference (WWDC), and are usually released in September of the same year, usually coinciding with the release of new iPhone models . The current stable release, iOS 11.2. 5, was released on January 23, 2018 . </P> <Table> Current versions <Tr> <Th> Version </Th> <Th> Build </Th> <Th> Release date </Th> <Th_colspan="5"> Device end - of - life </Th> </Tr> <Tr> <Th> Apple TV </Th> <Th> iPad </Th> <Th> iPhone </Th> <Th> iPod Touch </Th> </Tr> <Tr> <Td> 3.1. 3 </Td> <Td> 7E18 </Td> <Td> 000000002010 - 02 - 02 - 0000 Feb 2, 2010 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> 1st gen </Td> <Td> </Td> </Tr> <Tr> <Td> 4.2. 1 </Td> <Td> 8C148 </Td> <Td> 000000002010 - 11 - 22 - 0000 Nov 22, 2010 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> 3G </Td> <Td> </Td> </Tr> <Tr> <Td> 5.1. 1 </Td> <Td> 9B206 </Td> <Td> 000000002012 - 05 - 07 - 0000 May 7, 2012 </Td> <Td> N / A </Td> <Td> 1st gen </Td> <Td> N / A </Td> <Td> </Td> </Tr> <Tr> <Td> 6.1. 6 </Td> <Td> 10B500 </Td> <Td> 000000002014 - 02 - 21 - 0000 Feb 21, 2014 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> 3GS </Td> <Td> </Td> </Tr> <Tr> <Td> 7.1. 2 7.1. 2 </Td> <Td> 11D257 <P> 11D258 </P> </Td> <Td> 000000002014 - 06 - 30 - 0000 Jun 30, 2014 </Td> <Td> </Td> <Td> N / A </Td> <Td> </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 8.4. 2 </Td> <Td> 12H606 </Td> <Td> 000000002016 - 12 - 12 - 0000 Dec 12, 2016 </Td> <Td> </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 9.3. 5 </Td> <Td> 13G36 </Td> <Td> 000000002016 - 08 - 25 - 0000 Aug 25, 2016 </Td> <Td> N / A </Td> <Td> 2, 3, Mini 1 </Td> <Td> 4S </Td> <Td> 5 </Td> </Tr> <Tr> <Td> 10.3. 3 </Td> <Td> 14G60 </Td> <Td> 000000002017 - 07 - 19 - 0000 Jul 19, 2017 </Td> <Td> N / A </Td> <Td> </Td> <Td> 5, 5C </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 11.2. 5 </Td> <Td> 15D60 </Td> <Td> 000000002018 - 01 - 23 - 0000 Jan 23, 2018 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 11.3 Beta 2 </Td> <Td> 15E5178f </Td> <Td> 000000002018 - 02 - 06 - 0000 Feb 6, 2018 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="7"> <Table> <Tr> <Th> Legend: </Th> <Td> Discontinued </Td> <Td> Current </Td> <Td> Beta </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th> Version </Th> <Th> Build </Th> <Th> Release date </Th> <Th_colspan="5"> Device end - of - life </Th> </Tr>

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