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It's all about Android.....

Android is a software stack that includes an operating system, middleware and key applications. While Google is the main actor which comes to mind, the Open Handset Alliance also collaborates on Android's development and release. The operating system is based on the Linux kernel, the specific versions depends on the platform version and is given in the comparison table below.

Phones / Tablets / Smart watches / TV Player...

The latest version of the platform is now Lollipop 5.0

There was previously two flavors of the platform. One targeted for small screens mainly mobile phones (all versions below 3.0), and one dedicated for tablets: Honeycomb Android 3.0. However not all Android tablets support this version (some tablets use the Android 2.x).

These two variants of the platform have been merged to a versatile and uniform platform since "Ice Cream Sandwich", which has been released in October 2011. It combines "Gingerbread" and "Honeycomb" versions in a cohesive platform for tablets and phones at the same time.

Android 5.0 aka Lollipop target to be even more versatile to target also smart watches, TV player, Car media center... device with only 512 of RAM can support this new version.

Note: The market share figures (Sept. 2014) are based on statistics using API level, so the percentage might gather several versions of the Android platform.

The following comparison chart lists the main differences between each version of the android platform using the changelog of each version. Do not hesitate to contribute or comment to make this comparison table as accurate as possible.

Version name

Key user features added

Key developer features added

Release date

Android market share

API Level

Android 5.0LollipopNew design (Material design)Speed improvementBattery consumption improvementSeveral new APITracking battery consumption app2014 Oct 170 %20

Android 4.4.4 Kitkat 4.4 Fix Heartbleed / OpenSSL vulnerability2014 Jun 2324.5 % (4.4 - 4.4.4)19

Android 4.4.3KitKatBug fixesEnable Sprint Spark band 26 and band 412014 Apr 1424.5 % (4.4 - 4.4.4)19

Android 4.4.2KitKatBug fixesSecurity enhancements2013 Dec 924.5 % (4.4 - 4.4.4)19

Android 4.4.1KitKatBug fixesEnhance the camera on the Nexus 52013 Dec 524.5 % (4.4 - 4.4.4)19

Android 4.4KitKatScreen recordingNew Translucent system UIEnhanced notification accessSystem-wide settings for closed captioningPerformance improvementsPublic API for SMS management.Improved memory usageSecurity enhancements (SELinux enforcing mode, new cryptographic algorithms, VPN per user...)NFC Host Card Emulation (for wireless payment, loyalty programs...)Printing FrameworkStorage Access FrameworkHardware Sensor BatchingFull-screen immersive modeGLES2.0 SurfaceFlingerChromium WebViewAudio tunneling to DSPAudio monitoringWi-Fi certified MiracastNew Bluetooth profileIR Blasters APIWi-Fi Tunneled Direct Link Setup (TDLS) supportTools for analyzing memory use (procstats, on-device memory status and profiling)2013 Oct 3124.5 % (4.4 - 4.4.4)19

Android JellyBean 4.3 Dial pad auto-completePhoto Sphere enhancementsCamera app UI updated4K resolution supportAbility to create restricted profiles for tabletsHebrew and Arabic right-to-left (RTL) supportBluetooth Low Energy (BLE) supportBluetooth Audio/Video Remote Control Profile (AVRCP) 1.3 supportSecurity and performance enhancementsOpenGL for Embedded Systems 3.0 graphics supportLogging and analyzing enhancementsWi-Fi scanning APIImproved DRM (digital rights management) APIVP8 encoding2013 Jul 248 % (4.3)18

Android 4.2.2Jelly BeanAllow toggling Wi-Fi and Bluetooth state in Quick Settings using long-pressShows the percentage and estimated time remaining in the active download notificationsWireless charging and low battery sounds changedGallery app updated for faster loading with new image transitionPerformance enhancements and bug fixes (Bluetooth A2DP audio streaming fix...)Secure USB debugging (allow debugging to authenticated computers only)2013 Feb 1120.7 % (4.2 - 4.2.2)17

Android 4.2.1Jelly BeanFix missing december bug in the People appAdd support for Bluetooth gamepads and joysticks HID devices2012 Nov 2720.7 % (4.2 - 4.2.2)17

Android 4.2Jelly BeanLockscreen widgets360 degree images with Photo SphereGesture Typing, for faster typingWireless display with MiracastDaydream to display information when idle or dockedMulti-user for tabletsvsync timingTriple bufferingreduced touch latencyCPU input boostNative RTL support - mirrors the display from manifest propExternal display support - Display ManagerNested fragmentsRenderscript Compute - run tasks on the GPU (supported devices)Renderscript ScriptGroups, built-in intrinsics like blur,FilterScript is a subset of Renderscript made for high performance image processing2012 Nov 1320.7 % (4.2 - 4.2.2)17

Android 4.1.2Jelly BeanEnable Home screen rotationFix bugs and enhance performances2012 Oct 925.1 % (4.1 - 4.1.2)16

Android 4.1.1Jelly BeanFix a bug on screen orientation2012 Jul 2325.1 % (4.1 - 4.1.2)16

Android 4.1Jelly BeanGoogle Now (http://youtu.be/pPqliPzHYyc)Voice SearchSpeed enhancementsCamera app improvementsAccessibility: gesture mode, enable braille external keyboards...app stack navigation to define a parent activity in manifest for deep navigationMediaActionSound class to make sounds like when a camera takes a photoNFC supports large payloads over bluetoothWIFI/WIFI-Direct service discoveryLarge, detailed, multi-action notificationsInput manager allows you to query input devices2012 Jul 925.1 % (4.1 - 4.1.2)16

Android Ice cream Sandwich 4.0.4  stability improvementsbetter camera performancesmoother screen rotation2012 Mar 289.6 % (4.0.3 - 4.0.4)15

Android 4.0.3Ice Cream SandwichSocial stream API in Contacts provider to show updates associated to your contactsVideo stabilization and QVGA video resolution API accessAccessibility API refinements for screen readersCalendar provider updates2011 Dec 169.6 % (4.0.3 - 4.0.4)15

Android 4.0.2Ice Cream SandwichMinor fixes2011 Nov 280 %14

Android 4.0.1Ice Cream SandwichFacial recognition (Face Unlock)UI use Hardware accelerationBetter voice recognition (dictating/Voice typing)Web browser, allows up to 16 tabsUpdated launcher (customizable)Android Beam app to exchange data through NFC2011 Oct 190 %14

Android 4.0Ice Cream SandwichNew lock screen actionsImproved text input and spell-checkingControl over network dataEmail app supports EAS v14WI-FI directBlueTooth Health Device ProfileLow-level streaming multimedia (Khronos OpenMAX ALGrid LayoutSpell checking serviceAddress Space Layout RandomizationVPN client APIRemote Device camera enable/disableZSL exposure, continuous focus, and image zoomFlags to help control system ui elements like system bar from apps0 %14

And now the Following are the oldest Versions of Android...

Android 3.2.6HoneycombMinor fixes2012 Feb 150 %13

Android 3.2.4HoneycombAdded "Pay as you go" for tablets2011 Dec 150 %13

Android 3.2.2HoneycombMinor fixes2011 Sep 300 %13

Android 3.2.1HoneycombAndroid Market updates including easier automatic updatesGoogle Books updatesWi-Fi improvementsChinese handwriting prediction improved2011 Sep 200 %13

Android 3.2HoneycombOptimizations for a wider range of tabletsCompatibility display mode (zoom for fixed-sized apps)Media sync from SD cardExtended API for managing screens supportNew resource qualifiers for screens supportNew manifest attributes for screen-size compatibilityScreen compatibility mode which allows for phone apps to appear as if they were still on a phone2011 Jul 150 %13

Android 3.1HoneycombUI improvementsOpen Accessory APIUSB host APIMice, joysticks, gamepads... supportResizable Home screen widgetsMTP notificationsRTP API for audio2011 May 100 %12

Android 3.0HoneycombMulti core supportBetter tablet supportUpdated 3D UIcustomizable homescreensrecent applications viewingredone keyboard layoutMedia/Picture transport protocolGoogle Talk video chatGoogle eBooks"Private browsing"System-wide ClipboardHTTP Live streamingcontextual action barFragments first introduced(support library now supports it as well)Hardware-accelerated 2D graphicsRenderscript 3D graphics enginePluggable DRM frameworkdevice administrationHigh performance Animation FrameworkRTP streaming APIForced rendering of layersHigh performance WIFI lockVew network traffic statsADTS AAC and FLAC audioLRU cache2011 Feb 220 %11

Android 2.3.7GingerbreadGoogle Wallet support for the Nexus S 4G11.4 % (2.3.3 - 2.3.7)10

Android 2.3.6GingerbreadVoice search issue fixed11.4 % (2.3.3 - 2.3.7)10

Android 2.3.5GingerbreadImproved network performance for the Nexus S 4GFixed Bluetooth issues on the Samsung Galaxy SGmail app. improvements2011 Jul 2511.4 % (2.3.3 - 2.3.7)10

Android 2.3.4GingerbreadVoice or video chat using Google TalkOpen Accessory API2011 May 1011.4 % (2.3.3 - 2.3.7)10

Android 2.3.3GingerbreadNFC API improvements (peer to peer communication...)added unsecure bluetooth sockets2011 Feb 911.4 % (2.3.3 - 2.3.7)10

Android 2.3GingerbreadUpdated UIImproved keyboard ease of useImproved copy/pasteImproved power managementSocial networking featuresNear Field Communication supportNative VoIP/SIP supportVideo call supportperformance - concurrent garbage collection, faster event distribution, updated video driversNDK - Native Asset Manager, Native Activities + event handling, khronos apiaudio effects apiVP8, WebM, AAC, AMR widebandMultiple camera sensor supportstrictmode debuggingmedia framework replaces OpenCore2010 Dec 60 % (2.3 - 2.3.2)9

Android 2.2FroyoSpeed improvementsJIT implementationUSB TetheringApplications installation to the expandable memoryUpload file support in the browserAnimated GIFs2010 May 200.7 % (2.2)8

Android 2.1EclairUpdated UI2010 Jan 120 %7

Android 2.0.1Eclair2009 Dec 30 %6

Android 2.0EclairHTMLDigital zoomMicrosoft Exchange supportBluetooth 2.1Live WallpapersUpdated UI2009 Oct 260 %5

Android 1.6DonutGesture frameworkTurn-by-turn navigation2009 Sep 150 %4

Android 1.5CupcakeBluetooth A2DP, AVRCP supportSoft-keyboard with text-predictionRecord/watch videos2009 Apr 300 %3

Android 1.1Banana bread"Show" & "Hide" numeric keyboard, in caller applicationAbility to save MMS attachments2009 Feb 90 %2

Android 1.0Apple pieDownload and updates via Android MarketWeb BrowserCamera supportGmail, Contacts and Google Agenda synchronizationGoogle MapsYouTube application2008 Sep 230 %1

Android 0.92008 Aug 220 %