Government hit a “technical barrier” with NHS Track and Tracing app

The video discusses the development and testing of a contact tracing app, highlighting challenges faced with Apple devices and the collaboration with Google and Apple to overcome these issues. The app works well on Android but faces technical barriers on iPhones. The team plans to combine their algorithm with Google and Apple's technology to create a more effective solution.

What is the significance of measuring distance in contact tracing apps?

What is the main goal of the app as stated in the text?