1.0 Released: September 23, 2008

• The first stable version of the system.
  
• Appeared application store Android Market

1.1 Release date: February 9, 2009

• Correction of several problems.
  
• API changes.
  
• Added details and reviews to maps.
  
• Increased screen off period when used in phone mode.
  
• Added buttons "Show" and "Hide" in the call menu.
  
• Added support for saving attachments from MMS.
  
• Added support for labels in layouts.
  
• Note: the version has been released only for T-Mobile

1.5 Released: April 30, 2009

• Ability to install third-party keyboards.
  
• New software keyboard with auto-fill and the ability to work at different positions of the screen.
  
• Support for widgets and folders on the desktop.
  
• Record and play video in MPEG-4 and 3GP.
  
• Support Bluetooth profile A2DP and AVRCP.
  
• The ability to automatically connect to a Bluetooth headset, located at a certain distance.
  
• WebKit and Squirrelfish Javascript Engine update.
  
• The ability to publish photos (Picasa) and video (YouTube) on the Internet.
  
• Added search by web page and the ability to work with text.
  
• Visual changes in the browser.
  
• Change your contact list and call history.
  
• Added tools for maintenance and automatic detection of the file system of the memory card.
  
• Animation when switching between windows.

1.6 Release date: September 15, 2009

• Changed the design and improved work with the application store Android Market.
  
• An interface for working with photos, a video camera and a gallery of images is integrated, allowing you to easily switch between photo and video mode, and the gallery has the ability to select several objects at once for deletion.
  
• Added multi-language voice search function.
  
• An updated search function that allows you to search through bookmarks, history, contacts, as well as on the Internet.
  
• Improved speed of search and camera applications.
  
• Added support for CDMA, 802.1x, VPN, and speech synthesis.
  
• WVGA resolution support.
  
• Gesture gestures framework and GestureBuilder tool added.
  
• Added free step by step navigation from Google.

2.0 Release date: October 27, 2009

• Added the ability to use multiple Google accounts.
  
• Updated email client interface for working with multiple accounts.
  
• Added support for Microsoft Exchange Server through Exchange ActiveSync 2.5
  
• Added the ability to quickly access contacts.
  
• Added the ability to search through SMS and MMS messages and automatically delete old messages when the limit is reached.
  
• Camera update: support for flash, digital zoom and effects.
  
• Improved on-screen keyboard layout and dictionary learning mechanism.
  
• New browser user interface and HTML5 support
  
• Updated calendar.
  
• Updating graphics architecture to improve hardware acceleration.
  
• Support Bluetooth 2.1 and OPP and PBAP profile.
  
• Added support for new screen sizes and resolutions.
  
• Changed user interface.
  
• Improved MotionEvent class to support multiple touches.

2.0.1 2010

• Minor API changes, bug fixes, framework behavioral changes.

2.1 Released: January 2010

• Added "live" wallpaper.
  
• Improved background contrast.
  
• Added improvements to Google Maps 3.1.2.

Notes:

• The 2.0.1 SDK was released on December 3, 2009.
  
• The 2.1 SDK was released on January 12, 2010.

2.2 Released: May 20, 2010

• Overall optimization of the Android OS, memory and performance.
  
• Additional improvements to the speed of applications using JIT compilation.
  
• Browser-integrated JavaScript engine V8, previously implemented in Chrome.
  
• Improved support for Microsoft Exchange (security policies, automatic recognition, viewing GAL, calendar synchronization, remote work).
  
• Improved application launch through phone and browser shortcuts.
  
• Added tethering via USB and Wi-Fi.
  
• Added the ability to block access to data via cellular communication.
  
• Updated application to work with the Android Market, which added the ability to group and automatic updates.
  
• Quickly switch between multiple keyboard layouts and their corresponding dictionaries.
  
• Voice dialing and sharing of contacts via Bluetooth.
  
• Support for numeric and character-numeric passwords.
  
• Browser field support for uploading files.
  
• Support for installing applications in extended memory.
  
• Adobe Flash support 10.2.
  
• Supports ultra-high resolution (320 dpi) screens, such as a 4-inch screen with a resolution of 720p.
  
• OpenGL ES 2.0 support

2.2.1

• Fixes some bugs, includes security and performance updates.

2.2.2

• Fixed minor bugs, including problems with SMS on the Nexus One.

2.2.3

• Security update.

2.3 Release Date: December 6, 2010

• Updated user interface design.
  
• Supports ultra-high screen sizes and resolutions (WXGA and above).
  
• Built-in support for SIP VoIP telephony.
  
• Support for playing video formats WebM / VP8, as well as support for audio standard AAC.
  
• New sound effects: reverb, equalizer, headphone virtualization, bass boost.
  
• Support for Near Field Communication standard.
  
• System support for copying and pasting.
  
• Redesigned multi-touch software keyboard.
  
• Improved support for embedded code development.
  
• Improvements for game developers in the field of audio, graphics and information input.
  
• Parallel garbage collection to improve performance.
  
• Built-in support for more sensors (for example, gyroscopes and barometers).
  
• Download Manager for long downloads.
  
• Improved power management and application control.
  
• Built-in support for multiple cameras.
  
• Switch from using the YAFFS file system to ext4.

2.3.1

• Fixed bugs.

2.3.2

• SMS / MMS bugs fixed.

2.3.3

• Some improvements and APIs for the Android 2.3 platform.

2.3.4

• Video and voice chat for Google Talk.

2.3.5

• Performance improvements to the network stack for the Nexus S 4G, other changes and improvements.
  
• Fixed Bluetooth bug on Samsung Galaxy S.
  
• Improved Gmail application.
  
• Fixed problem with time zones (GMT + 3 and GMT + 4).

2.3.6

• Fixed voice search bug.

2.3.7

• Added support for Google Wallet payment system for the device.

3.0

• Multi-core processor support
  
• Improved tablet support with new user interface
  
• Three-dimensional desktop with rewritten widgets
  
• Improved multitasking
  
• Browser improvements, including bookmarks for open web pages, auto-completion of forms, synchronization of links with Google Chrome, private browsing mode
  
• Video chat support using Google Talk
  
• Hardware acceleration support

3.0.1

• ???("Vika" doesn't know this)

3.1

• The list of recently launched applications has been expanded.
  
• Resizable Desktop Widgets
  
• Support for external keyboards, mice, joysticks / gamepads
  
• Native playback of audio files in FLAC format
  
• HTTP proxy support for each connected WiFi point

3.2

• Optimizations made to support a wider range of tablets.
  
• Added a special mode of scaling applications with a fixed size
  
• Expanded Screen Support API for Developers
  
• Easy access of applications to files on the SD card, for example for synchronization

3.2.1

• Minor fixes for security and stability, improvements in Wi-Fi
  
• Update for Android Market with automatic updates and easy-to-read text of the Terms and Conditions
  
• Google Books update
  
• Improved support for Adobe Flash in the browser
  
• Improved predictive input in Chinese

3.2.2

• Minor improvements and fixes for Motorola Xoom 4G

Ice Cream Sandwich was announced on May 10, 2011 at the Google I / O 2011 conference and presented on October 19, 2011 along with the Galaxy Nexus smartphone. Among the features stated:
4.0.1

• Using a single shell for tablets, smartphones and other devices based on the Android OS
  
• Open Accessory API - API for integration with a variety of equipment
  
• Real-time Transport Protocol API support for audio
  
• Improved multitasking
  
• Change the notification panel
  
• Modified lock panel with shortcuts for quick launch of the camera, access to phone functions (calls), access to text messages and email menus
  
• Improved text input and spell checking
  
• Improved voice dictation mode
  
• Internet traffic control system
  
• Software enhancement of the camera: the introduction of the mode of panoramic shooting, software image stabilization, real-time effects during video shooting
  
• Support for taking screenshots (screen capture) of the operating system
  
• The updated browser with support for tabs, synchronization of bookmarks Google Chrome. Also updated WebKit core and V8 engine with Crankshaft support
  
• Enhanced security features: unlocking the device through the face recognition of the owner, full encryption of the device, ASLR, the new VPN API.
  
• Support Wi-Fi Direct.

4.0.2

• Bug fixes for Galaxy Nexus

4.0.3

• Optimize and fix bugs for smartphones and tablets.

4.0.4

• Improved camera performance, increased stability, smoother screen rotation and some fixes.

On June 27, 2012 on Google I / O, Google introduced the next version of Android 4.1 Jelly Bean along with the Nexus 7 tablet. The changes mainly affected the smoothness of the interface. The new update brought improvements in performance - the central and graphics processor are working in parallel. Thanks to this, on some Android 4.1 devices it will run at 60 frames per second.
October 29, 2012, along with the Nexus 10 tablet and LG Nexus 4 smartphone, the Android 4.2 Jelly Bean operating system was officially introduced.
On July 25, 2013, the Android 4.3 Jelly Bean operating system was officially announced with a small amount of changes.
4.1.1

• Updated interface, using Project Butter technology for a smoother UI. The technology includes triple buffering of the graphics pipeline to achieve no jumps in the frame rate during interface animation, as well as vertical synchronization technology.
  
• Automatically scaling the widget and changing the location of the rest of the content if it does not fit on the desktop.
  
• Update virtual keyboard, received predictive input system and advanced dictionary. Support for new languages.
  
• The possibility of voice input offline, without using an Internet connection.
  
• Blind or visually impaired people will be able to connect a Braille input device to a smartphone or tablet on Android 4.1.
  
• More informative notification bar.
  
• An updated search, thanks to which, in the manner of a voice assistant, you can get answers to asked voice questions.
  
• Added Google Now service. It will provide the user with useful information, based on the calendar, the history of search queries and routes of the phone.
  
• Contact photos are now stored and displayed in high quality.
  
• Improved Camera application adds some features.
  
• The new interface for tablets, the classic interface of Android 3.0-4.0.4 is available through editing Build.Prop, changing the DPI to a value below 140.

4.1.2

• Bugs fixed and performance improved.
  
• Increasing and decreasing the size of notifications in the panel are now performed with one finger.
  
• Added landscape desktop mode in Nexus 7.

4.2

• One of the main innovations in Android 4.2 has been the support of profiles, now several accounts can be used on one device, each with its own settings, programs and personal information.
  
• The keyboard now supports gestures for input like the popular Swype. To enter words, you can now drag your finger on the keyboard by selecting the necessary letters, and the built-in dictionary will try to provide the necessary options. In general, according to Google, in Android 4.2 dictionaries have become more accurate and complete.
  
• The Camera application has a new shooting mode called Photo Sphere, it allows you to create 360-degree panoramas and publish them on Google+ or Google Maps, thus creating your own Street View version.
  
• There is support for wireless transmission of video and games to compatible TVs using Miracast technology.
  
• The notification panel now has access to the quick settings menu.
  
• A new Daydream standby mode has appeared, when the device is connected to the docking station or is in sleep mode, it can display various useful information, news, weather, or just photos from the album.
  
• Google Now has also received a slight improvement, it can now scan Gmail to find various relevant content, such as plane tickets or meeting invitations, and create reminder cards.
  
• Now you can place widgets on the lock screen.
  
• Updated camera interface.
  
• Upgrading the Linux kernel to branch 3.4.
  
• Removed the classic tablet interface used in 3.0-4.0.4.

4.2.1

• The error of the missing month (December) in the Contacts application has been fixed.
  
• Improved vibration performance with notifications.
  
• Now you can connect to the device HID gamepads and joysticks via Bluetooth.

4.2.2

• Some security enhancements, bug fixes.
  
• In the curtain of the notification center when downloading, not only the filling progress bar is displayed, but also the percentages and download time.
  
• Shortcuts for quick activation of Wi-Fi and Bluetooth in the switch panel received an additional option: now a long press of the icon immediately turns on the wireless module, and a single click sends the user to the settings.
  
• There are new sounds: when you connect the device to the wireless charging station, a new signal alerts the critical battery level.
  
• Fixed errors in the transmission of sound via Bluetooth.
  
• Improved ADB security.

4.3

• Keep and Hangouts will now be included in the firmware and Google Apps by default.
  
• A recently found bug called MasterKey is fixed.
  
• Smart or Bluetooth 4.0 LowEnergy is included in the new firmware, which increases the energy efficiency of the device when using this protocol.
  
• The notification area now shows all running applications, even in the background. Disable the display of the icon in the panel can be in the settings.
  
• In the settings, you can set the permanent operation of Wi-Fi for improved geo-positioning.
  
• AVRCP 1.3, available in conjunction with Bluetooth Smart, allows you to use Bluetooth to combine two devices and use them as control devices.
  
• A new camera and gallery is available.
  
• The system now supports OpenGL ES 3.0.
  
• There was a hidden setting of individual permissions for applications.

4.3.1

• Eliminating small errors and improving the stability of the system and its performance. Only for Nexus 7 (2013) LTE.

October 31, 2013, Google introduced the next version of Android Kitkat. The changes affected the interface. Android has also been optimized to run on budget smartphones with 512 MB of RAM.
Simultaneously with the new version of Android, Google also introduced the Google Nexus 5 smartphone. Version innovations:
4.4

• Main article: Android KitKat
  
• Google Now, active voice assistant
  
• Display covers and control buttons on the lock screen when playing music or showing movies via Chromecast.
  
• Navigation buttons and notification bar are automatically hidden.
  
• Faster task switching and memory allocation.
  
• Priority in the phone book.
  
• Smart caller ID and calling organization.
  
• Hangouts communication center.
  
• Japanese emoticons in the standard keyboard.
  
• Cloud printers support.
  
• Fast file saving to the cloud.
  
• Support Message Access Profile in cars with Bluetooth.
  
• Chromecast support.
  
• Launching web apps via Chrome.
  
• Displays movie subtitles in a standard video player.
  
• "Remote control Android".
  
• Updated file uploader design: list or thumbnail.
  
• Switch launchers through phone settings.
  
• Update mail.
  
• Support applications via infrared.
  
• Access to location settings via the icon in “Quick Settings”.
  
• Setting the method of determining the location: exact or with less battery consumption.
  
• Running applications in the sandbox.
  
• Support pedometers.
  
• Making payments through Google Wallet and storing statistics.
  
• Beta version of Android Runtime (ART)
  
• Immersive mode.

4.4.1

• Elimination of small errors.

4.4.2

• Improved camera Nexus 5, reducing the lag of the shutter, more precise focus and better white balance. Also includes fixing some bugs and improving performance. Nexus 7 2012 added “Wireless Monitor” Settings - Display.

4.4.3

• Improved dialer interface and Contacts application
  
• Various fixes and improvements

4.4.4

• The security bug related to OpenSSL has been fixed.