We developed a Christmas-themed Advent Calendar feature to increase daily activity and social sharing. The concept was simple yet engaging: users would need to walk a set number of steps daily to unlock a surprise offer, such as product discounts from partner brands. Each user’s step target was customised based on their activity data, and new users had targets set using average steps from existing users. We also built in a social sharing feature, allowing users to showcase their daily progress and overall achievements through a story-like carousel. This helped generate buzz and attract new users, keeping engagement high throughout the festive period.