Case Study | Mobile App Retargeting

Yazio Success Story

Company Overview

Yazio Validates Retargeting ROI with Uplift Testing — Driving 43% More Revenue

Yazio, a leading health and nutrition tracking app based in Germany, partnered with YouAppi to test the real value of retargeting in its performance strategy. Known for its personalized meal planning and fitness tracking tools, Yazio already saw strong results from user acquisition and organic channels — but sought clear, quantifiable insight into whether retargeting could deliver true incremental lift.

Challenge

While Yazio had built a strong user base, the team wanted to understand if re-engagement efforts could truly move the needle. Could retargeting bring back dormant users at scale — and more importantly, could it deliver value beyond what they were already seeing from UA and organic efforts?

Solution

Strategy: Measuring Incrementality Through Uplift Testing

To answer that question, YouAppi proposed a strategic uplift test using ghost bidding methodology. The test targeted non-paying users who had initiated checkout or registration in the last 90 days but had not logged in for 7+ days. A test group received personalized retargeting campaigns, while a control group was held out — allowing YouAppi to isolate the true incremental impact of the retargeting effort.

The test wasn’t just about reactivation — it was about proving the business case for retargeting.

Results

The results spoke for themselves, showing that retargeting added significant value across engagement and monetization metrics:

+28.5% uplift in unique app opens
+31.3% uplift in subscriptions
+43.2% uplift in revenue
Over 50% of re-engaged users had been inactive for more than 15 days

Based on the success of the test, Yazio quickly scaled Android campaigns, launched retargeting on iOS, and introduced localized creatives to maximize impact.

KEY TAKEAWAYS

Uplift testing delivered transparent results, proving retargeting’s role in Yazio’s growth strategy
Incremental revenue gains were substantial, supporting future budget allocation
Success unlocked expansion, including iOS rollout and creative localization

QUOTE

We were impressed with YouAppi’s ability to bring back dormant users at scale and deliver measurable uplift across both engagement and revenue. The test showed clear added value compared to our baseline.

Dudu Arditti

Senior performance marketing manager, Yazio

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