I was using Twitter a lot on my phone, and was realising there was a massive gap between the link on the tweet and the full story. If you could come up with a summary layer to show in Twitter, that would be awesome.

The App Store has democratized the creation of content. As a 12-year-old kid, I was able to put my application on the store. No one knows whos behind the screen so you cant tell Im a 12-year-old.

I don't feel like a different person. My motivation has always been to do technology apps and companies, not making money. Just because the money's come, nothing's changed.

It's the scale that Yahoo brings - and that user base - that I really want to build products for.

One thing I'd like to do is angel investing in small companies. That's what's exciting, and if you are lucky to have a bit of money, you can take those risks.

Yahoo to me, as the founder of a company, is one of the biggest opportunities you could have; it's one of those classic Internet companies.

I thought of the idea of Summly in March or April 2011. I was 15 years old and I was revising for some kind of history exam. The problem was I was trying to find information that was useful to me. When you type into Google an esoteric term, you get quite a lot of stuff that's not relevant.