# Web Runtime versions and device support

### Web Runtime versions

The following table summarizes the changes for each version of the Web Runtime (WRT) environment.

Table: Web Runtime version information
WRT version | Changes
--- | ---
WRT 1.0 | First release of the S60 Web Runtime environment. Support for widgets through built-in JavaScript objects.
WRT 1.1 | Support for S60 Platform Services through JavaScript Service APIs. Support for home screen widgets on compatible S60 5th edition devices, such as the Nokia N97.

The Web Runtime environment is backward-compatible. Widgets created for WRT 1.0 run normally with WRT 1.1. However, you should take newer technologies, such as different display sizes and the introduction of touch UI, into consideration when running WRT 1.0 widgets on newer mobile devices. Widgets created using the WRT 1.1 Service APIs do not work with WRT 1.0.

For detailed information about the features supported by the WRT versions, see section Web Runtime features. For information about the Internet technology standards supported by WRT, see section Web Runtime standards.

### Web Runtime device support

WRT 1.0 is supported on S60 3rd Edition, Feature Pack 2 devices.

WRT 1.1 is supported on S60 5th Edition devices.

You can find information about which mobile device models support the Web Runtime environment on the Web Run-Time technology page at the S60 Web site. You can find more specific information about the devices at the Forum Nokia Device Specifications page and the S60 devices page.