"Steve can be sparky," Bono recalled, "but those moments have made us closer friends,
because there are not many people in your life where you can have those robust discussions.
He's very opinionated. After our shows, I talk to him and he's always got an opinion."
Jobs and his family occasionally visited Bono and his wife and four kids at their home near Nice on the French Riviera.
On one vacation, in 2008, Jobs chartered a boat and moored it near Bono's home.
They ate meals together, and Bono played tapes of the songs U2 was preparing for what became the No Line on the Horizon album.
But despite the friendship, Jobs was still a tough negotiator.
They tried to make a deal for another ad and special release of the song "Get On Your Boots," but they could not come to terms.
When Bono hurt his back in 2010 and had to cancel a tour,
Powell sent him a gift basket with a DVD of the comedy duo Flight of the Conchords,
the book Mozart's Brain and the Fighter Pilot, honey from her beehives, and pain cream.
Jobs wrote a note and attached it to the last item, saying, "Pain Cream -- I love this stuff."