Technology commentator Sarah Putt looks at the new 'cool' app, Clubhouse. It's invite-only and also only available on iPhone. She'll also look at how Bumble has given Tinder a run for its money with its IPO - and that money just turned its female founder into another self-made billionaire. And it's 75 years since the first all-electronic, programmable computer was created in a lab at the University of Pennsylvania.