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Behind the Purple Milkshake:

The Omnichannel Play That Hooked Gen-Z

With the viral Grimace Shake launching in Singapore, the window to capture attention was narrow, and the competition for Gen Z eyeballs fierce. The real challenge for McDonald's Singapore: turning passive buzz into active app downloads and measurable engagement.

April 26, 2026

The Challenge

With the viral Grimace Shake launching in Singapore, the window to capture attention was narrow, and the competition for Gen Z eyeballs fierce. The real challenge: turning passive buzz into active app downloads and measurable engagement.

Gamification Meets the City Grid

Through Adzymic's partnership with Stellar Ace, McDonald's activated premium DOOH inventory at Singapore's highest-footfall Gen-Z locations — Dhoby Ghaut, Bugis, Singapore Management University, and the Central Business District — unlocking premium DOOH screens that few platforms can offer advertisers directly.

Adzymic's DCO engine then did the heavy lifting on creative — powering three real-time sequences that made every exposure feel personal and timely:

🚌 Live bus arrival data challenged commuters to beat the clock: "Play a game with Grimace before your bus arrives"

🌡️ Temperature-triggered creatives dynamically swapped messaging when the heat peaked — making a cold Grimace Shake feel like a necessity, not a treat

🍔 Rotating menu carousel showcased the full Grimace special lineup for discovery

Engaging Users with AR

Scanning the QR code on the DOOH ad activated an AR game experience — Grimace emerges from the screen into the real world. Beat the game, unlock a reward.

Existing app users were deep-linked directly into the app for redemption. New users were directed to download first — a clear conversion pathway from physical interaction to app acquisition.

Beyond DOOH: A Connected Omnichannel Strategy

The campaign extended beyond the screen. Mobile devices of users in the vicinity of DOOH ads were captured for retargeting. Non-converters were systematically re-engaged with personalised Grimace offers — a seamless journey from DOOH exposure to gameplay, to app acquisition and sales conversion.

High-Impact Skinner Ads

High-impact Skinners on the APX premium ad network — Mediacorp, SPH, TheSmartLocal, Carousell and more. The gamified concept extended to mobile takeover banners, creating another route to interaction and in-app conversions. Audiences engaged with premium display executions were captured for retargeting.

Standard Display

Adzymic's DCO powers contextualised, personalised messaging across standard display banners — retargeting users from DOOH and Skinner exposure alongside McDonald's first-party app database to drive last-mile conversion at scale.

The Results

  • 3X higher CTR from DOOH-retargeted audiences vs. other segments
  • 97% lower CPA from retargeted DOOH audiences
  • +13% year-on-year increase in daily active users
  • ~1% new user conversion rate from total game plays — incremental acquisition, not just re-engagement

When omnichannel reach meets personalised messaging and creatives, outdoor advertising stops broadcasting — and starts converting.