Case Study: Audi achieves increased test‑drive leads and higher conversion rates with Appier's CrossX AI

Building and reaching an audience on every screen

Audi, a century‑old German luxury automaker, partnered with Appier to drive test‑drive signups for the Audi A4. The challenge was to engage affluent, auto‑interested consumers across devices and maximize the number of qualified leads while optimizing cost per lead.

Using Appier’s enhanced buying and CrossX AI, Audi targeted high‑value users (age 30+, previously browsing luxury brands), mapped their devices for cross‑screen outreach, and applied frequency capping to focus exposure on the devices most likely to convert. The campaign generated more leads and improved efficiency: cross‑screen users delivered a 23–48% higher conversion rate than single‑screen users and a 34% higher CTR, with many users clicking on smartphone after seeing the ad on PC or tablet.

Audi