Sans has been a household name in the Dutch fashion world for 24 years. While their webshop provides a strong foundation, the full potential of their mobile app (built by our partner IMshop) remained untapped for a long time. In the summer of 2025, Sans and Wuzzon joined forces to transform the app into a high-performance sales channel. The Goal: To significantly increase app revenue by taking all facets of App Growth to the next level through an integrated, data-driven approach. This focus on app revenue is crucial for future growth.
1. The Foundation: From ‘Black Box’ to Data-Driven
At the start of the partnership, the app revenue and general performance was unclear. While revenue was being generated, deeper insights into user behavior and marketing efficiency were limited. To crack this “Black Box,” we built a comprehensive foundation:
- Unified Dashboard: We created a central dashboard where data from the backend, app stores, media channels, and push notifications converge. This allowed us to steer based on factual results rather than gut feeling.
2. Strategic Bridge between development, marketing & internal ops
With the dashboard as a central hub, Wuzzon acted as the strategic connector between the app developer (IMshop), the internal Sans organization, and the marketing execution (Wuzzon’s extended team of app growth specialists). This streamlined communication and allowed for rapid implementation of new growth tactics: better insights in app revenue and other growth kpi’s, managed user acquisition on a variety of channels, followed by optimizing the push notification journeys.
3. Smart Growth in a Picking-Up Market
Although the overall market showed signs of recovery in the second half of 2025, the specific focus on the app ensured an acceleration that far outperformed regular web growth. Our strategy covered three key areas:
- App Store Optimization (ASO): Through a full audit and the implementation of optimized SEO texts and visuals, Sans claimed top positions for high-intent fashion search terms and relevant brands like PME Legend.
- Multi-Channel User Acquisition (UA): We deployed a mix of Meta Shopping and Google App Campaigns to ensure a stable flow of high-quality installs. By using advanced optimization strategies, we maintained a healthy “Cost Per Install” (CPI) while scaling volume.
- Web2App Strategy: To leverage the existing customer base, we launched targeted email campaigns. Loyal web customers were guided to the app with specific incentives. This resulted in a surge of high-LTV (Lifetime Value) customers who return more frequently once they are within the app environment.
4. Engagement: The Lasting Value of App Users
Turning an “install” into a “buyer” requires active engagement. We optimized the retention flow using OneSignal, segmenting users based on behavior:
- New user onboarding flows.
- Abandoned shopping cart triggers.
- Re-engagement journeys for inactive users.
Combined with optimized ad-hoc push notifications, we achieved click-through rates (CTR) exceeding 10%, significantly outperforming market averages.
5. The Results: App Performance on the Rise
The results of the six-month partnership speak for themselves:
- +37% Growth in App Revenue (YoY): A massive increase in December revenue compared to the previous year.
- +63% Growth in Monthly Active Users (MAU): Proving that new users are staying engaged through our owned media strategy.
- Higher Loyalty: The Average Order Value (AOV) in the app remains structurally higher than on other platforms.
“Since the start of the collaboration with Wuzzon, the app has become an increasingly vital sales channel. The results show that a broad approach doesn’t just drive downloads, but builds lasting loyalty among both new and existing customers.”
— Tom Sans, Founder of Sans Online
The Next Step
With the data foundation, advertising channels, and engagement strategies firmly in place, our focus for 2026 shifts toward further scaling creative optimization. We aim to connect even more customers with the Sans brand through high-impact, personalized app experiences.
Do you want to maximize the potential of your mobile app? Contact Wuzzon for a comprehensive App Growth audit.
EN 
NL 