This week on Tech Weekly with Aleks Krotoski we hear from technologist and entrepreneur Nick D'Aloisio. Nick, at the tender age of 18, has already sold his first tech startup, the news app Summly, to Yahoo for £18m. At this year's Mobile World Congress in Barcelona he launched the UK edition of Yahoo's News Digest app. Nick speaks to Samuel Gibbs who also reports on some of the other big announcements at this years congress.

Also joining Aleks are the Guardian's Jemima Kiss, Alex Hern and Keith Stuart. The team discuss the recent purchase by Facebook of Whatsapp, the messaging app, for $19bn (£11.5bn) and why a game called Twitch Plays Pokemon has enthralled hundreds of thousands of online gamers.