When you make a purchase with Android Pay, various characters—including space explorers and Wimbledon players—pop up on your screen from time to time. Google has now teamed up with the creators of the new Justice League movie and is bringing five superheroes to the app: Batman, Wonder Woman, The Flash, Cyborg, and Aquaman.

Starting in the next few days and ending on December 31, you’ll have the chance to collect these superheroes in the Android Pay app after making a purchase.

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To participate, make sure you have the latest version of the app installed on your smartphone. When you open it, a promo page will appear where you’ll be able to join in on the fun. Once that’s done, try collecting all Justice League members by buying stuff with Android Pay — you can track how many you have in the app. You can also share the collected superheroes with friends and invite them to join the hunt.

In addition to the new characters, Google has also announced it’s expanding Android Pay to two new markets: Brazil and the Czech Republic. However, users in those two countries won’t be able to collect Justice League members. The hunt for Batman and other superheroes is limited to the US, UK, Australia, Poland, Russia, Canada, Spain, Taiwan, Hong Kong, and Singapore.

Mitja Rutnik

Mitja is a full-time member of the Android Authority writing team specializing in news, how-tos, features, and more. In addition to everything tech-related, he also loves basketball and is a self-proclaimed pizza expert.