MietKlar

A city-backed rent transparency application that collects anonymized real rent data from citizens and converts it into a dynamic map of Munich’s rental reality.

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Inspiration

We were inspired by Munich’s housing challenges, which include a lack of transparency and limited tools for tenants to make informed decisions. Our goal was to create a solution that empowers tenants while helping the city understand real rent trends, ultimately making renting fairer and more transparent.

What it does

MietKlar is a city-backed rent transparency app that:

  • Collects anonymized rent data from citizens.
  • Visualizes real rents in interactive neighborhood maps.
  • Provides personalized fair-rent evaluations.
  • Suggests neighborhoods that match users’ lifestyle and budget.

How we built it

We combined user-submitted data with anonymization and GDPR-compliant practices. Our approach included:

  • Developing an interactive map and rent visualization engine.
  • Implementing AI on-device to analyze rental contracts without storing personal data.
  • Designing smart filters for neighborhoods based on lifestyle, budget, and amenities.

Challenges we ran into

  • Ensuring data privacy while making the app useful.
  • Collecting enough real rent data to make trends meaningful.
  • Balancing complex features like AI contract analysis with a simple user experience.
  • Making the app inclusive for students, expats, and long-term residents.

Accomplishments that we're proud of

  • Successfully built a fully GDPR-compliant app that anonymizes all data.
  • Created dynamic, neighborhood-level rent maps that provide actionable insights.
  • Developed an AI-powered contract analyzer that works entirely on-device.
  • Designed a personalized fair-rent evaluation and neighborhood matching system.
  • Contributed to more informed renting decisions for tenants in Munich.

What we learned

  • Data privacy and transparency can coexist if handled carefully.
  • Real-world user data is essential for creating meaningful insights.
  • Urban housing solutions need to address both individual and city-wide needs.
  • Clear, user-friendly design is as important as sophisticated back-end technology.

What's next for MietKlar

  • Expand the app to cover more neighborhoods and property types.
  • Add real-time alerts for unfair rent trends or contract risks.
  • Partner with local universities and expat organizations to reach more users.
  • Develop policy dashboards for city officials to make data-driven housing decisions.
  • Explore AI-powered recommendations for alternative affordable housing solutions.
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