An updated version of Googles mobile payment platform, Android Pay, has begun rolling out to users, bringing not just new functionality, but a promotion designed to celebrate the upcoming film Justice League.

Android Pay version 1.36 is designed to get the most out of Android 8.0, with Adaptive Icons and a redesigned interface that moves the overflow menu from the top right corner to a more spaced-out navigation drawer. Shortcuts like Nearby stores and Enter promo code have gained feature icons, and other options have been rearranged for a better user experience.

The changes are all relatively minor that only an eagle-eyed user will spot immediately. Far more obvious is the tie-in to the new Warner Bros. film Justice League, which builds off of Android Pays history of dressing up its Android bot characters during holiday seasons, with previous celebrations including Diwali, Halloween and Chinese New Year.

The promotion will introduce five Android bots dressed as characters from the film, with each payment made using the app unlocking a new character and background animation, including Wonder Woman, Batman, Cyborg, Aquaman and The Flash.

The characters will be stored loyalty card-style in Android Pays wallet, with users able to select characters from those they already own, see who they still have to unlock, and even share them with friends. The feature will be available until 31 December in 10 markets, including the United States, UK, Australia, Russia and Hong Kong.

Join us at the 2017 Effective Mobile Marketing Awards Ceremony, taking place in London on Thursday 16 November, to mix with the industrys best and brightest, and raise a glass to the years best campaigns and solutions. To find out more, and to book your place, click here.