Bill, who is also the father of Jennifer and Rory, recently revealed his kids will inherit "less than 1 percent" of his $108 billion wealth when he dies.

Phoebe Gates, 22, has just launched Phia - an app that helps shoppers compare the prices of new and used items across thousands of e-commerce sites - with her former Stanford University roommate, Sophia Kianni,

I would have kept her on a short leash and be doing business reviews,” Bill Gates said of his daughter Phoebe’s venture