The document discusses the challenges of launching mobile apps, including: - Apps need to be available on over 375 different devices from 8 manufacturers to reach 70% of UK mobile owners. The top 10 devices only represent 28.11% of the market. - Mobile billing has a poor reputation and tariffs are extremely confusing, which can lead to unexpected high bills ("bill shock"). - The mobile landscape is becoming more fragmented as simpler, cheaper tariffs commoditize access across different carriers and devices.