Gamification of a Retail Mobile App: Why, What for and How

"Gaming in a supermarket chain's mobile app? Seems pretty easy, bring it in!" - this was the thought that started the GameDev epic in Pyaterochka.

There's game testing, and there's mobile app testing. The team had no experience in GameDev QA, and sometimes it was unexpected, difficult and incomprehensible, but definitely interesting and cool.