SlimWonen: Helping Dutch households adopt more sustainable energy habits

From early concept to a scalable platform, we partnered with SlimWonen to research, design, and build an energy-usage app that empowers residents to understand their consumption and adopt more sustainable habits at home.

Dale Wesdorp

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March 4, 2026

The challenge

The problem
behind the brief

SlimWonen wanted to offer Dutch residents a simple way to understand their energy consumption and make more sustainable choices in daily life. They needed an app that not only showed data but motivated people to act on it regularly. They also needed a secure data pipeline to retrieve information from smart meters and a platform housing corporations could trust at scale. Finally, SlimWonen wanted to fully own their product and its data while growing their digital capacity long term.

Our approach

How we built the right thing, and built it right

Strategy

We began with user research and heuristic analysis to understand how residents interacted with the original app, what motivated them and where the friction happened. These insights shaped a clearer product strategy built around behaviour change based on different user profiles and their distinct motivations. Together with SlimWonen we defined the features that mattered most and restructured the product to support a continuous and fun habit forming experience.

Design

We redesigned the app from the ground up: clear energy insights, improved navigation and new feature flows to help residents understand their consumption and its impact. We introduced gamification throughout the user experience including tips, challenges, and a visualized sustainability journey to support long term behaviour change. The UI was redesigned for clarity across all ages and alignment with SlimWonen’s new brand identity.

Development

We built a cloud based platform that securely retrieves consumption data from smart meters and scales across housing associations. The updated architecture supports new features, behavioural insights and richer analytics without compromising performance. We created an advanced data platform for housing corporations and provided SlimWonen with documentation and guidance to maintain full control of their product and their users’ data.