The long-awaited COVID Tracker app was finally launched last night, with over 400,000 people downloading it so far.

The app is designed to help health authorities tackle the spread of the virus through contact tracing, which requires Bluetooth to work. It doesn't require access location services, and Apple and Google have confirmed there will be no sharing of data.

But how effective will the app be, and has this technology worked in other countries?

Andy O'Donoghue joined us for Tech Tuesday to discuss this, alongside Liam Herrick from the Irish Council for Civil Liberties.