Apple insiders say that there are some major surprises at this year's Apple Worldwide Developers Conference, most notably a major update in software for iPhones and iPads.
Apple has not said what they will unveil at the conference, but the yearly meeting usually has big product and software debuts.
John Gruber, an Apple blogger, said he is unsure exactly what will happen, but knows it will be "unexpectedly big."
"The one thing I keep hearing over and over again from friends who would know is some of the stuff they're going to show is 'polarizing,'" Gruber said.
Rumors indicate that the company is going to launch the next operating system for mobile devices: iOS 7.
Apple last year unveiled its own mapping service at the meeting, and also announced better integration with social networks and improvements on Siri. There were also new MacBooks announced with thinner and higher-resolution screens.
The new iOS7 is expected to have a radically different look. Jony Ive is the newly appointed head of software, replacing Scott Forstall.
Forstall was repeatedly criticized for the iPhone's "skeuomorphic" design, which keeps design features from older versions without updating them. Icons for Messages, Maps and Mail have remained relatively the same for all versions of iOS.
But now, Ive is expected to change the design of some of the most used apps, making them look more simple and monochromatic.
"Our goal is to try to bring a calm and simplicity to what are incredibly complex problems so that you're not aware really of the solution, you're not aware of how hard the problem was that was eventually solved," Ive said.
"Simplicity is not the absence of clutter, that's a consequence of simplicity. Simplicity is somehow essentially describing the purpose and place of an object and product."