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WebOS running on an LG Smart TV
Developer LG Electronics,
Open webOS community contributors,
previously Hewlett-Packard & Palm
Written in C++
OS family WebOS (based on Linux kernel)
Source model Open source
Latest release

3.0.5 (tablet)
1.4.5 (Pre, Pre Plus (US), Pixi, and Pixi Plus)

2.1 (Pre Plus (UK) and Pre 2) 2.1.2 (Veer) 2.2.4 (Pre 3) (phone) / 12 January 2012 (2012-01-12)
Marketing target Embedded devices
Available in English (US), Spanish, French, Italian and German
Platforms ARM
Kernel type Monolithic (Linux kernel)
Default user interface Graphical (Luna)
License Apache License
Official website .com.hpweboswww

WebOS, also known as webOS, LG webOS, Open webOS, or HP webOS, is a Linux kernel-based operating system for smart TVs,[1] and formerly a mobile operating system.[2] Initially developed by Palm, which was acquired by Hewlett-Packard, HP made the platform open source, and it became Open webOS. The operating system was later sold to LG Electronics. Through all iterations of the operating system (Palm, HP and now LG) the owners have stylized the name as webOS.[3] The specifies the non-stylized name for an article like this, with a capital W. Various versions of WebOS have been featured on several devices, including Pre, Pixi, and Veer phones, the HP TouchPad tablet and LG TVs LB870, LB730 and LED LB671.


  • Background 1
  • Features 2
    • Multitasking interface 2.1
    • Synergy 2.2
    • Over the air updates 2.3
    • Notifications 2.4
    • Synchronization 2.5
    • Third-party applications 2.6
    • Growth and decline of App Catalog 2.7
    • Smart TV features 2.8
  • Platform 3
  • See also 4
  • Notes 5
  • References 6
  • External links 7


Logo history

Palm launched WebOS in January 2009 then called Palm webOS as the successor to Palm OS. The first WebOS device was the original Palm Pre, released by Sprint in June 2009. The Palm Pixi followed. Upgraded "Plus" versions of both Pre and Pixi were released on Verizon and AT&T.

In April 2010, HP acquired Palm; WebOS was described as a key asset and motivation for the purchase. The $1.2 billion acquisition finalized in June. HP indicated its intention to develop the WebOS platform for use in multiple new products, including smartphones, tablet computers, and printers.[4]

In February 2011, HP announced that it would use WebOS as the universal platform for all its devices.[5] However, HP also made the decision[6] that the Palm Pre, Palm Pixi, and the "Plus" revisions would not receive over-the-air updates to WebOS 2.0,[7] despite a previous commitment to an upgrade "in coming months."[8] HP announced several new WebOS devices, including the HP Veer and HP Pre 3 smartphones, running WebOS 2.2, and the HP TouchPad, a tablet computer released in July 2011 that runs WebOS 3.0.

In March 2011, HP announced plans for a version of WebOS by the end of 2011 to run within Windows,[9] and to be installed on all HP desktop and notebook computers in 2012.[10] Neither ever materialized, although work had begun on an x86 port around this time involving a team in Fort Collins, Colorado. Work was scrapped later in the year.

In August 2011, HP announced that it was interested in selling its Personal Systems Group, responsible for all of its consumer PC products, including WebOS, and that WebOS device development and production lines would be halted.[11][12][13] It was unclear whether HP would consider licensing of WebOS software to other manufacturers. When HP reduced the price of the Touchpad to $99, the existing inventory quickly sold out.[14]

The HP Pre 3 was launched in select areas of Europe, and U.S.-based units were available only through unofficial channels as both AT&T and Verizon canceled their orders just prior to delivery after Apotheker's (HP's CEO at the time) announcement.[15] Notably, these U.S. Pre 3 units, having been released through unofficial channels, lacked both warranties and carried no support obligation from HP; as a result parts are nearly impossible to come by. HP announced that it would continue to issue updates for the HP Veer and HP TouchPad, but these updates have failed to materialize for the former, and the latter saw a final, unofficial release called "webOS CE" that contained only open-sourced components of WebOS meant for what remained of the developer community rather than a conventional, user-centric update to the operating system. The latest HP WebOS version, 3.0.5, was released on 12 January 2012.

In December 2011, after abandoning the TouchPad and the proposed sale of the HP Personal Systems Group, HP announced it would release WebOS source code in the near future under an open-source license.[16] In August 2012, code specific to the existing devices was released as webOS Community Edition (CE), with support for the existing HP hardware. Open webOS includes open source libraries designed to target a wider range of hardware. HP renamed its WebOS unit as "Gram."[17][18]

On 25 February 2013 HP announced that it was licensing WebOS to LG Electronics for use on its web-enabled Smart TVs. LG Electronics is allowed unlimited access to the documentation, source code, developers and all related websites. LG Electronics acquired WebOS from HP to enhance their smart TVs, replacing their previous NetCast platform.[19][20] However HP will still hold on to patents underlying WebOS as well as cloud-based services such as the App Catalog.[21] Despite WebOS now being shaped as an OS for smart televisions, LG has not ruled out the possibility of a WebOS smartphone, the original purpose of the OS.[22]


Screenshot of Palm WebOS Launcher (2010)

The WebOS mobile platform introduced features so innovative that some are still in use by Apple, Microsoft and Chrome.[23]

Feature LG webOS Open webOS HP webOS/palm webOS
Multitasking Interface Line Cards Cards Cards
Gestures through Magic Remote through touch screen and physical keyboards through touch screen and physical keyboards
Synergy Not supported Not supported Supported
Third-party applications LG Store Homebrew App Catalog
Over the air updates Yes Yes Yes
Wireless recharging N/A N/A Yes (proprietary standard)
Simple setup/connection Yes N/A N/A
Discovery of nearby devices via Connect SDK No later devices support Bonjour/ZeroConf and proprietary "Touch to Share"
Open Source No Yes Some code released under Open webOS[24]
Devices / Versions LG Smart TVs / LG webOS Ported to multiple devices / Open webOS 1.0

HP Touchpad / webOS Community Edition

pre, pre plus, pixi, pixi plus / HP webOS 1.4.5[25]

pre2, pre3 / HP webOS 2.x.x

HP Touchpad /HP webOS 3.0.x

Multitasking interface

Navigation uses

The HP Touchpad tablet runs WebOS. The 'card' multitasking UI is shown.


Palm referred to integration of information from many sources as "Synergy." Users can sign into multiple email accounts from different providers and integrate all of these sources into a single list. Similar capabilities pull together calendars and also instant messages and SMS text messages from multiple sources.[26]

Over the air updates

The OS could be updated without docking to a PC, instead receiving OS updates over the carrier connection.


The notification area is located on the bottom portion of the screen on phones, and on the top status bar area on tablets.

On phones, when a notification comes in, it slides in from the bottom of the screen. Due to the resizable nature of the Mojo and Enyo application frameworks, the app usually resizes itself to allow unhindered use while the notification is displayed. After the notification slides away, it usually remains as an icon. The user can then tap on the icons to expand them. Notifications can then be dismissed (sliding off the screen), acted upon (tapping), or left alone.


By default, data synchronization uses a cloud-based approach rather than using a desktop sync client, but various third-party sync clients are available. The first version of WebOS shipped with the ability to sync with Apple's iTunes software by masquerading as an Apple device, but this feature was disabled by subsequent software updates from Apple.

Third-party applications

On HP WebOS, officially vetted third-party applications are accessible from the device for wireless download by using the App Catalog.[27]

As HP webOS replaced Palm OS, Palm commissioned MotionApps to code and develop an emulator called Classic, to enable backward compatibility to Palm OS applications. This operates with WebOS version 1. Palm OS emulation was discontinued in WebOS version 2.0.[28] MotionApps disengaged from Classic in 2010, citing HP Palm as "disruptive."[29]

Another source of applications is homebrew software.[30][31] Homebrew applications are not directly supported by HP. Programs used to distribute homebrew WebOS applications include WebOS Quick Install (Java-based for Desktop computers), and Preware (a homebrew WebOS app catalog, which must be sideloaded to install). If software problems do occur after installing homebrew programs, "webOS Doctor" (provided by HP) can restore a phone back to factory settings and remove most changes made by homebrew apps and patches.[32]

LG Store is the official access for LG webOS with apps including NowTV, Twitter, Netflix, Hulu Plus, Amazon Instant Video, Vudu, CinemaNow, and[33]

Growth and decline of App Catalog

Palm webOS (HP webOS) launched 6 June 2009 on the Palm Pre with 18 available applications. The number of apps grew to 30 by 17 June 2009,[34] with 1 million cumulative downloads by 27 June 2009;[35] 30 official and 31 unofficial apps by 13 July 2009;[36] 41 official apps by 25 August 2009;[37] 356 official apps by 7 November 2009[38] 1,000 official apps by 1 January 2010;[39] 3,000 official apps by 27 July 2010;[40] 4,000 official apps 29 September 2010;[41] and 10,002 official apps by 9 December 2011.

Subsequently, the number of available applications has decreased. Developer attrition accelerated in the latter half of 2011 after retail presence ceased. The number of currently maintained applications on the platform, defined as any application that has been updated within the last six months, is unknown.

Many applications have been pulled from the App Catalog, often precipitously. Examples include the apps for The New York Times and Pandora Radio. The number of remaining functional applications is currently unknown. When factoring out abandoned and/or non-functioning applications that remain in the App Catalog at present, the number is projected to be substantially lower.

The WebOS community will have lost all HP App Catalog access after the scheduled January 15, 2015 shutdown of the HP App Catalog servers, as published by a splash screen on November 11, 2014.

Smart TV features

LG has redesigned the UI of WebOS, whilst maintaining the card UI as a feature called "Simple switching" between TV apps. The other two features promoted by the company are simple connection (using an animated Clippy-like character to aid the user through setup), and simple discovery.


Underneath the graphical user interface, WebOS has much in common with mainstream Linux distributions. Versions 1.0 to 2.1 use a patched Linux 2.6.24 kernel.[42]

The list of open-source components used by the different releases of WebOS, as well as the source code of and patches applied to each component, is available at the Palm Open Source web page.[42] This page also serves as a reference listing of the versions of WebOS that have been publicly released.

In 2011, Enyo replaced Mojo, released in June 2009, as the software development kit (SDK).[43]

See also



  1. ^ Nandagopal Rajan (3 March 2014). "LG’s WebOS could actually make people use smart features in televisions". Retrieved 10 March 2014. 
  2. ^ "Open webOS :: Open webOS Architecture". Retrieved 14 June 2013. 
  3. ^ "HP webOS Developer FAQ". Palm, Inc. 
  4. ^ Bajarin, Ben (30 June 2011). "HP Is Committed to Its 'WebOS' Platform (and It Should Be).". TechLand ( 
  5. ^ "HP snubs Windows, plans to integrate WebOS into PCs". Digital Trends. 9 February 2011. Retrieved 14 June 2013. 
  6. ^ "Thanks (really!) for the feedback". Hewlett Packard. 
  7. ^ "HP Breaks Promise: WebOS 2.0 Upgrades for Palm Pre and Pixi Not Coming". Retrieved 13 February 2011. 
  8. ^ Hardy, Ed (20 November 2010). "HP Commits to WebOS 2.0 Upgrades for All Palm Smartphones". Retrieved 27 November 2013. 
  9. ^ Hollister, Sean (14 March 2011). "HP TouchPad coming June, WebOS for PC beta by year's end". Engadget. Retrieved 27 November 2013. 
  10. ^ "Apotheker Seeks to Save HP's 'Lost Soul' With Software Growth". BusinessWeek (Bloomberg). 9 March 2011. Retrieved 9 March 2011. 
  11. ^ "Developing and Distributing with HP: Developer Program Details". Hewlett-Packard Development Company. 2010. Archived from the original on 2010-12-01. 
  12. ^ "HP Confirms Discussions with Autonomy Corporation plc Regarding Possible Business Combination; Makes Other Announcements". BusinessWire. 18 August 2011. Retrieved 18 August 2011. 
  13. ^ "HP kills WebOS, spins off PC business to focus on software". AppleInsider. 11 August 2011. Retrieved 18 August 2011. 
  14. ^ "HP Web OS -High connectivity, stability and security". Hewlett-Packard Development Company. Retrieved 10 March 2011. 
  15. ^ Fried, Ina (22 August 2011). "HP: WebOS Still Coming to PCs and Printers, Pre3 Launching in "Limited" Markets". AllThingsD. Retrieved 24 August 2011. 
  16. ^ "HP to Contribute WebOS to Open Source". Press Release: December 9, 2011. Hewlett-Packard. 9 December 2011. Retrieved 10 December 2011. 
  17. ^  
  18. ^ Musil, Steven (15 August 2012). "'"HP spins off WebOS business, rebranding it as 'Gram. CNET. Retrieved 5 December 2012. 
  19. ^ "Gram working with LG on an Open webOS TV". webOS Nation. 24 October 2012. 
  20. ^ "LG Electronics Acquires webOS from HP to Enhance Smart TV". Press Release: February 25, 2013. Hewlett-Packard. 25 February 2013. Retrieved 14 June 2013. 
  21. ^ "HP offloads Palm WebOS assets to Korea's LG". BBC. Retrieved 26 February 2013. 
  22. ^ Nilay Patel (25 February 2013). "HP emerges as big winner in WebOS sale". Retrieved 6 January 2014. 
  23. ^ "Six Clicks: Features introduced in WebOS you are using today". Retrieved 10 March 2014. 
  24. ^ "Open Source Packages". Retrieved 6 April 2014. 
  25. ^ "Palm International". Retrieved 15 July 2010. 
  26. ^ "Palm Unveils All-new WebOS" (Press release).  
  27. ^ "HP webOS official website". Palm, Inc. Retrieved 14 June 2013. 
  28. ^ Derek Kessler. 25 Oct. 2010.WebOS 2.0, MotionApps drops Classic PalmOS Emulator in Palm's lap.
  29. ^ MotionApps. 25 Oct. 2010.Classic's Got a Brand New Home! MotionApps Hands Classic Over to Palm
  30. ^ Precentral ( Homebrew Apps
  31. ^ milominderbinder ( 22 Jan. 2010. Getting Started: Homebrew Apps, Patches, and Themes with WebOS Quick Install.
  32. ^ "HP WebOS Doctor". Retrieved 6 January 2014. 
  33. ^ "LG reveals massive plans for WebOS TV platform". The Verge. 30 September 2013. Retrieved 6 January 2014. 
  34. ^ Barletta, Bryan (18 June 2009). "Palm Pre Prepared For The Spotlight?". Medialets, Inc. 
  35. ^ Barletta, Bryan (24 June 2009). "Palm Pre App Catalog Reaches 1 Million Downloads". Medialets, Inc. 
  36. ^ Bohn, Dieter (10 July 2009). "Palm Pre Homebrew: 31 Apps. Official App Catalog: 30". Smartphone Experts. 
  37. ^ Tofel, Kevin C. (24 August 2009). "Official Palm Pre App List Growing — Word Ace Rocks!". GigaOm. Retrieved 27 April 2012. 
  38. ^ Bohn, Dieter (7 November 2009). "New in the App Catalog for 7 November 2009". webOS Nation. Retrieved 27 April 2012. 
  39. ^ Werlinger, Robert (1 January 2010). "App Catalog Hits 1000 apps". webOS Nation. Retrieved 27 April 2012. 
  40. ^ St. Andrie, Ryan (27 July 2010). "App Catalog Breaks Through 3000". webOSroundup. Retrieved 27 April 2012. 
  41. ^ Bohn, Dieter (29 September 2010). "webOS surpasses 5,000 apps". webOS Nation. Retrieved 27 April 2012. 
  42. ^ a b "Open Source Packages: HP webOS open source compliance". Retrieved 28 October 2013. 
  43. ^ Jesse Mendoza (30 March 2010). "HP Rolls Out WebOS 3.0 Beta with Enyo On Board". 

External links

  • Open WebOS
  • WebOS Developer Center
  • WebOS Source Code Downloads
  • WebOS Internals Wiki
  • Pre to postmortem: the inside story of the death of Palm and WebOS by Chris Ziegler
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