“Apple’s Passbook is already the fourth-most popular mobile commerce app among U.S. consumers,” Mark Hoelzel and Marcelo Ballve report for Business Insider. “It ranks just behind giants like eBay, Amazon, and Groupon in terms of user adoption.”

“One-fifth of iPhone owners already use Passbook to download ‘passes’— coupons, gift and loyalty cards, airline boarding passes, and movie and event tickets,” Hoelzel and Ballve report. “Large retailers — from Sephora to Target — and restaurant chains and Major League Baseball are already using it as a channel for acquiring and retaining customers.”

Read more in the full article here.

Related articles:
Why Apple’s Passbook is growing on retailers – June 25, 2013
Dunkin’ Donuts mobile app adds support for Apple Passbook – February 28, 2013
MLB triples number of stadiums that accept mobile tickets via Apple’s Passbook – February 27, 2013
Apple’s Passbook an amazing success for developers – December 20, 2012
Major League Baseball brass shocked as 12% chose Apple’s Passbook over traditional tickets – October 10, 2012
How to add your Starbucks card to Apple’s Passbook app – October 4, 2012
How to get started with iOS 6′s most underrated new app: Passbook – September 26, 2012