### World-Class Fintech Design at Startup Speed for Stackwell

Stackwell is an investing app on a mission to eliminate the racial wealth gap, backed by Fenway Sports Group, The Kraft Group, and Social Change Fund United, with NBA and WNBA partnerships driving financial wellness across four major US cities. For over 18 months we've been working with Stackwell's product team as their design partner: building a comprehensive design system, systematically redesigning the entire mobile app from MVP aesthetic to a polished fintech experience, grounding UX decisions in real user data, and producing the investor decks and marketing assets that carry the brand's ambition. All on a flexible capacity model that scales up or down with the reality of startup life.

### From Early Demo to Investor-Ready PropTech Platform

MapMortar is a London-based PropTech startup on a mission to decarbonise 2.5 billion buildings by 2050, using AI and physics-based simulation to help property managers plan and track their path to net zero. We joined MapMortar at the earliest stage, when the product was a rough demo and the team needed something investor-ready. Over a partnership now running for more than three years, we designed the MVP that helped secure their pre-seed round, built the brand, website and pitch materials that opened doors with clients and investors, and have stayed on as their ongoing product partner as the platform scales.

### Designing Both Sides of an AI-Enabled Fertility Clinic

Ovom Care is reinventing fertility care from the ground up: a digital-first, AI-enabled fertility clinic founded in Berlin by Felicia von Reden alongside clinician Dr Lynae Brayboy, with physical clinics in London and Portugal and an expansion across Europe underway. The company has been recognised in Forbes 30 Under 30 Europe 2025 (Science & Healthcare) and WIRED's Hottest Startups in Berlin. We designed both sides of their product from one body of clinical truth: a patient app warm enough to hold someone through the hardest weeks of their life, and a clinician platform sharp enough to make a vast, complex treatment readable at a glance, plus the AI features, App Store presence, and marketing assets around them.

### From Airport SIM Stores to a Global eSIM eCommerce Platform

Vuoly began life as SimStore, an established telecom business with a strong reputation in Ecuador, selling physical SIM cards to travellers through airport stores. As the world shifted to eSIMs, founder José Vilches needed to take the business online and compete globally, with zero in-house tech team. We were the product team in Vuoly's corner: researching the market, designing a buying experience built for first-time eSIM buyers, developing the full eCommerce platform from scratch on Ruby on Rails, integrating multiple eSIM providers into a single backend, and creating the travel-inspired brand that carries it all. Today Vuoly offers eSIM coverage across 195+ countries and competes head-to-head with major international providers, and we've stayed on as their product partner post-launch.

By: Bilyana Freye, Orbiit

Lumi Studio led Orbiit's strategic pivot from community matchmaking tool to B2B SaaS growth engine, a high-stakes repositioning that increased Average Customer Value by 400%. The work spanned direct conversations with 15+ potential B2B customers, competitor analysis, a new product roadmap, and a platform redesign for enterprise buyers with executive dashboards, CRM integrations, and streamlined onboarding, all while keeping the transition seamless for existing community customers. Lumi focused on identifying true pain points and delivering targeted solutions that make an impact, with no time wasted on generic frameworks, and drove the project forward in a responsive, timely, and enthusiastic way. One enterprise client saw a 900% increase in retention, and Orbiit was acquired by Hivebrite a year after the pivot.

By: Claudia Nassif, FYTA

Lumi Studio redesigned the companion app for FYTA's smart plant sensors, focusing on habit formation and conversion. The engagement began with hands-on research: testing the sensors, interviewing customers, and analysing competitors, before redesigning the homescreen around the actions that mattered, building a gamification system with quizzes and badges, and overhauling the in-app eCommerce experience. Lumi Studio reduced friction and complexity while enhancing the customer experience, over-delivered on tasks, and stayed exactly within the assigned timelines, structuring the work in clearly defined design sprints. Early testing showed the gamification features increased user motivation and connection with their plants, with some users aiming to make their plants flower.

By: Larysa King, Stackwell Capital

Lumi Studio has been Stackwell's embedded design partner for over 18 months, building a comprehensive design system, systematically redesigning the entire investing app sprint by sprint, and producing investor presentations and marketing materials. Stackwell's team went through significant changes during that period, with people coming and going and roles shifting, and Lumi Studio remained a constant, adapting quickly to different styles and changing needs. Flexibility and quality of work were the two elements that defined the partnership: capacity flexed with the reality of the startup's stage, while data-driven UX decisions reduced friction at critical moments in the user journey. The app's look and feel consistently impresses new audiences, including investors.

By: Josephine Bromley, MapMortar

Lumi Studio designed an investor-ready MVP for MapMortar's building decarbonisation platform, then stayed on as product design partner for over three years, covering brand identity, website, pitch materials, and continuous product iteration as the platform scales. Lumi Studio delivered everything the team hoped for and more, teaching them about product development methodology along the way and pushing them to prioritise features and ideas. The studio stood out for its ability to think big while keeping things feasible, turning early thinking into complete, polished concepts. The design work was central to securing pre-seed funding, and the software's look draws regular compliments from clients and investors, which rarely happens with tools in the built environment.