SAN FRANCISCO (AP) - Google is countering the release of Apple's latest iPhones with two devices running on a new version of Android software designed to steer and document even more of its users' lives.

SAN FRANCISCO (AP) Google is countering the release of Apple's latest iPhones with two devices running on a new version of Android software designed to steer and document even more of its users' lives.

The Nexus 6P and Nexus 5X unveiled Tuesday are the first smartphones that will be sold with an Android upgrade called "Marshmallow." It features changes that will give Android's personal assistant, Google Now, expanded powers to explore the information that people call up in the mobile applications.

Google uses its Nexus line of phones to showcase how the company would like Android to be set up. Most phone makers, though, still take advantage of the freedom that Google gives them to alter Android.

Prices for the Nexus 6P start at $499 and at $379 for the 5X.