In one of the most ambitious product launches in its history, Apple unveiled two new iPhones, a smartwatch and a mobile payments platform on Tuesday.

The iPhone 6 and iPhone 6 Plus are bigger, rounder and faster. The Apple Watch does more than any smartwatch on the market today. And Apple hailed the Apple Pay payments system for its security and ease of use.

New, bigger iPhones: “Today, we are launching the biggest advancement in the history of iPhone,” Apple CEO Tim Cook said at an event in Cupertino, Calif. “They are without a doubt the best iPhones we’ve ever done.”

The iPhones have curved edges and bigger screens that measure 4.7 inches and 5.5 inches, up from just four inches on the iPhone 5S.

To help users handle the bigger phone, Apple has moved the on-off switch to the right edge of the phone. And when you double-tap the home button, the entire display will slide down so users can access items on the top of the screen.

Crucially, the bigger displays allow for bigger batteries: 11 hours of video watching on the iPhone 6 and 14 hours for the iPhone 6 Plus — up from 10 hours on the iPhone 5S.

Both new iPhones feature Apple’s new A8 processor, which is 25% faster than the iPhone 5S. The M8 co-processor will allow fitness apps to tell the difference between walking and biking and even measure your relative elevation.

The iPhone 6 and iPhone 6 Plus will feature an 8 megapixel camera that comes with a new sensor that Apple claims will help the camera focus faster.

And the iPhones will come with Apple’s new iOS 8 software, featuring a new HealthKit application that monitors users’ heart rates, sleep, weight and blood pressure among other health-related information. Apple said iOS 8 will be available Sept. 17 to customers who have an iPhone 4S, iPhone 5, iPhone 5C or iPhone 5S.

  Gadgets, iPhones