My motivation has always been to do technology apps and companies, not making money. Just because the money's come, nothing's changed.

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.

I put together an iPhone app called TrimIt and released that in July 2011. About a month later, the private fund of the Hong Kong billionaire Li-Kashing cold emailed me and expressed an interest to invest, but they didn't realize I was 15. They thought it was a U.K. company with a team.

There is a generation of skimmers. It's not that they don't want to read in-depth content, but they want to evaluate what the content is before they commit time. Especially on a mobile phone - you don't have the phone, or cellular data, or screen size to be reading full-length content.

Football has been my life for as long as I can remember.

Sports help women stay in school longer and make them less likely to use drugs, break the law, or get pregnant at an early age.

My father was a really good athlete, so his pop-ups really were sky high. Eventually I learned how to judge them properly and catch them well. It was great training for when I started to play on teams, which I did all through school.

What I do now is I train in the mornings, and people ask me why I do it. I do it for two reasons: first of all, to keep in shape, but secondly, I think training, sport, and physical activity is really good for mental health.