Please only use this tag if you feel your question is specific to Android 7.0 Nougat. It was officially released on August 22, 2016, on Nexus devices.
Android 7.0 "Nougat" is the 7th major version of the Android operating system. First released as a beta build on March 9, 2016, it was officially released on August 22, 2016, with Nexus devices being the first to receive the update.
Nougat introduces notable changes to the operating system and its development platform, including the ability to display multiple apps on-screen at once in a split-screen view, support for inline replies to notifications, as well as an OpenJDK-based Java environment and support for the Vulkan graphics rendering API, and "seamless" system updates on supported devices.