(KCEN) -- There's still no official confirmation of what Apple plans to show off Tuesday.

But it could be the worst kept secret in the tech world.

Apple is expected to update its flagship iPhone model, rumored to be called the iPhone 5s.

It's possible it will come in different colors and is also expected to have upgraded hardware.

According to other leaks, the iPhone 5s will have more computing power and an improved camera.

But the most exciting rumor? A fingerprint sensor where the home button is traditionally located.

So are all the rumors true?

We will find out Tuesday.