Channel 4 has launched 4oD Catch Up for iPad , a free app offering on-demand content from the UK broadcaster.

The app is only compatible with the iPad and iPad 2 and requires a Wi-Fi connection to work, and will only be free to download for a limited period, the company said.

Unlimited content from the previous 30 days from Channel 4, E4 and More4 is available to download and watch free of charge. However, some US shows are not available, and neither are shows older than 30 days.

"Programmes from longer than 30 days ago are not yet available, but we're working to bring these to you soon. Watch this space..." the company said.

You can search for programmes by date, title or category. It is only available for those in the UK. Advertising is played before and during the content.

Note: Want to learn more about the iPad 2? Click here to check out the Digital Edition of Macworld's Complete Guide To The iPad 2.