|Initial release||May 31, 2007|
|Stable release||0.5.36.0 (February 22, 2010) [±]|
|Development status||Discontinued (see End of life section)|
|Operating system||Windows XP, Vista, 7, Windows Mobile 5, 6, Mac OS X, Linux 32 bit|
|License||Open source (BSD)|
Gears, formerly Google Gears, was software offered by Google that "enables more powerful web applications, by adding new features to the web browser. It allows some online files to be used offline". Released under the BSD license, Gears is free and open source software.
In late November 2009, numerous online news sources reported that Google was going to migrate to Web Storage rather than use Gears in the future. A Google spokesman later clarified that Google would, however, continue to support Gears so as not to break sites using it. On 22 November 2011, Google announced that on 1 December 2011, Gears support would be removed from Gmail and Google Calendar. Gears was removed from Google Chrome stable on June 7, 2011.
There are several major API components to Gears:
- A Database module (powered by SQLite), which can store data locally.
- A Desktop module, which lets web applications interact more naturally with the desktop.
- A Geolocation module, which lets web applications detect the geographical location of their users.
Version history 
|0.1||2007-05-31||Initial release as Google Gears. |
|-||2008-05-28 ||Project renamed to Gears to reflect the open source, collaborative nature of the project.|
|0.3||2008-06-11 ||Introduced ability to add desktop icons, support for Mozilla Firefox 3.|
|0.4||2008-08-22 ||Geolocation API / Event handling for upload / download transfer progress, localization in 40 languages|
Several web applications from a variety of companies have used Gears at some point, including Google (Gmail, YouTube, Docs, Reader, Picasa for mobile, Calendar, Wave), MySpace (Mail Search), Zoho (Writer, Mail), Remember The Milk, and Buxfer. WordPress 2.6 added support for Gears, to speed up the administrative interface and reduce server hits. However, after Google announced in February 2010 that there would be no further development of Gears (see End of life section), several of these applications have discontinued their support for Gears, including Google Reader and WordPress
Gears is supported on Google Chrome and Internet Explorer 6 and Internet Explorer 8 on Windows XP, Vista and Seven, Internet Explorer Mobile 4.01 and later on Windows Mobile, Safari 3.1.1 and later on Mac OS X 10.4 and later (though not with Safari 4 on Mac OS X 10.6 Snow Leopard; with no sign of a fix anytime soon), and Firefox 1.5 and later on multiple platforms. There is only limited 64 bit support from third parties.
On May 29, 2008, Opera Software ASA announced that Opera Mobile 9.5 would support Gears. The technology preview release of the browser was published on February 20, 2009. It is currently available for touch-screen devices on Windows Mobile 5 & 6 only. Gears is not built into browsers other than Google Chrome and must be downloaded separately.
End of life 
On February 19, 2010, the Gears team at Google announced that the development of Google Gears had stopped, as they are working on bringing all of the Gears capabilities into web standards like HTML5. Although development of new features has ceased, Google is planning to continue supporting Gears until they have developed a "simple, comprehensive" method for users' data to be migrated to HTML5 features. Google Gears was removed from the Google Chrome stable on June 7, 2011. 
See also 
- Revision: r3423
- "Happy birthday,
- "Gears". Retrieved 2008-09-01.
- "Google Code project for Gears". Retrieved 2008-02-26.
- "What's powering Web apps: Google waving goodbye to Gears, hello to HTML5". Los Angeles Times. 2009-11-30. Retrieved 2009-12-02.
- "Chrome Stable Release".
- "Database Module AI". Retrieved 2007-05-31.
- "WorkerPool Module API". Retrieved 2007-05-31.
- "LocalServer Module API". Retrieved 2007-05-31.
- "Desktop Module API". Retrieved 2007-05-31.
- "Geolocation Module API". Retrieved 2008-08-27.
- "Gears History". Retrieved 2008-06-28.
- "WordPress Trac ticket - Gears Support".
- "Google Reader blog - end of offline support".
- "WordPress documentation - Tools Subpanel".
- "Gearsmonkey: Gears + Greasemonkey". Retrieved 2009-08-13.
- "Gears for Safari beta". Google. Retrieved 2008-08-26.
- "Issue 847: Mac: Gears not working Safari 4 - Snow Leopard". Google Code. Retrieved 2009-09-05.
- "Opera extends Gears support". Opera Software. Retrieved 2008-05-29.
- "Technology preview: Gears-enabled Opera Mobile 9.5". Opera Software. Retrieved 2009-02-21.
- "Gears-enabled Opera Mobile 9.51b2 download page". Opera Software. Retrieved 2009-02-21.
- "Google Gears Takes Ruby on Rails Offline". eWeek. Retrieved 2008-07-15.
- "Hello HTML5".