ITV is introducing a new subscription fee into its iOS app that will allow users to watch the last 30 days of ITV content without advertising. Priced at £4 per month, the new subscription covers content across ITV, ITV2, ITV3, ITV4 and CITV, and will also provide simulcasts of ITV3 and 4 over 3G and WiFi. All of the previously existing free content will remain available at no cost, but supported by ads.