|Initial release||March 2015|
3.1.0 (OnePlus X)
|Written in||C++, Java|
|Operating system||Android 6.0.1 & Android 7.1|
|Available in||English (default)|
|Type||Graphical user interface|
OxygenOS (Chinese: 氧OS; pinyin: yǎng OS) is a customised version of Android operating system developed by Chinese smartphone manufacturer OnePlus exclusively for their smartphones. OxygenOS was developed for their overseas market. There is also another version of the OS designed specifically for the Chinese home market called HydrogenOS (Chinese: 氢OS; pinyin: qīng OS).
Notable features of version 2.0 and 2.1.1 include app permissions, Waves MaxxAudio, SwiftKey keyboard, off-screen gestures, custom icons, dark mode, manual camera mode, and RAW support for 3rd party apps, like Camera FV-5 2.75.
On 31 December, 2016, OnePlus released OxygenOS 4.0.0 to the public via OTA download. It is based on Android Nougat and includes its features and several other modifications.
|Version Number||Device||Android Version||Release Date||Notes|
|1.0||OnePlus One||Android 5.0.1||Only available via flashable ZIP, provided through OnePlus website.|
|2.0 through 2.2.1||OnePlus One, OnePlus 2 and OnePlus X||Android 5.1.1|
|2.2.2 through 2.2.3||OnePlus X||Android 5.1.1||4 August to
28 September 2016
|Supplied September Android Security Bulletin and necessary dependencies for Marshmallow upgrade.|
|3.0.2||OnePlus 2||Android 6.0.1|
|3.2.1||OnePlus 3||Android 6.0.1|
|3.2.4||OnePlus 3||Android 6.0.1|
|3.2.6||OnePlus 3||Android 6.0.1|
|3.2.7||OnePlus 3||Android 6.0.1|
|3.2.8||OnePlus 3, OnePlus 3T||Android 6.0.1|
|3.5.3||OnePlus 3T||Android 6.0.1||28 November 2016||Out of the box firmware for OnePlus 3T devices sold outside China.|
|3.5.4||OnePlus 3T||Android 6.0.1||19 December 2016|
|3.5.5||OnePlus 2||Android 6.0.1||24 December 2016|
|3.5.6||OnePlus 2||Android 6.0.1||5 January 2017|
|3.5.8||OnePlus 2||Android 6.0.1||12 April 2017||Android security patch level of March 1, 2017. Latest version for OnePlus 2 as of June 2017.|
|4.0.0||OnePlus 3, OnePlus 3T||Android 7.0||31 December 2016||Official Android Nougat with new improvements|
|4.0.1||OnePlus 3, OnePlus 3T||Android 7.0||7 January 2017||Bug fixes from 4.0.0|
|4.0.2||OnePlus 3, OnePlus 3T||Android 7.0||14 January 2017||Bug fixes from 4.0.0 & 4.0.1|
|4.0.3||OnePlus 3, OnePlus 3T||Android 7.0||8 February 2017||Bug fixes from 4.0.2|
|4.1.0||OnePlus 3, OnePlus 3T||Android 7.1.1||16 March 2017||Update to Android 7.1.1, General Bug Fixes and Improvements|
|4.1.1||OnePlus 3, OnePlus 3T||Android 7.1.1||28 March 2017||Bug fixes from 4.1.0|
|4.1.3||OnePlus 3, OnePlus 3T||Android 7.1.1||17 April 2017||Bug fixes from 4.1.1|
|4.1.5||OnePlus 3, OnePlus 3T||Android 7.1.1||7 June 2017||Bug fixes from 4.1.3, Android security patch level of May 1, 2017. General optimizations and improvements, Enhanced system stability|
|4.1.6||OnePlus 3, OnePlus 3T||Android 7.1.1||12 June 2017||Bug fixes from 4.1.5|
|4.5.0||OnePlus 5||Android 7.1.1||20 June 2017||Out of the box firmware for OnePlus 5 devices|
|4.5.1||OnePlus 5||Android 7.1.1||22 June 2017||Smaller bugfixes|
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