Awareness of mobile payments has been stoked by Apple Pay, which Apple introduced last October. Apple has partnerships with dozens of American banks, allowing Apple Pay to work with most major credit cards. Some retailers, like Walgreens and Whole Foods, have said mobile wallet payments in their stores have grown significantly since the debut of Apple Pay.

But analysts have noted that a missing piece from Apple Pay was a rewards program to keep users returning to participating merchants. People familiar with Apple Pay said that next month, Apple will announce such a program offering perks to consumers who make purchases with the service, though they declined to reveal details.

Apple Pay remains limited. It is available only on the latest Apple mobile devices, and just a select number of retailers accept payments from the service, said Jan Dawson, an independent technology analyst for Jackdaw Research.

“Apple Pay has given it a really big shot in the arm, but even that is nascent,” Mr. Dawson said. That leaves plenty of room for another company, like Google, to grab a slice of the market, he said.

Google’s new Android Pay can also be used at brick-and-mortar stores in addition to letting merchants accept credit card payments from their mobile apps, said the people familiar with the company’s plans. Consumers who use Android Pay for a purchase will also automatically add points to loyalty programs run by participating retailers, they said. The revamped Google Wallet will be available for Android and iOS devices, they added.

Google has had trouble getting a mobile wallet to catch on with consumers. In 2011, the company introduced Google Wallet, a way for customers to pay for purchases in stores with an Android phone. The project was riddled with problems; issuing banks and the large credit card networks were not on board, and mobile carriers hampered Google’s efforts to support Google Wallet on Android phones.

With its revitalized payments push, Google now is working closely with credit card networks, card-issuing banks and payments processors, said the people familiar with the situation. Retailers, too, are more eager to accept mobile payments products that work with their loyalty programs in order to gain insight into customer shopping habits.