App Client - My Project Companion - App Store

https://apps.apple.com/fr/app/client-my-project-companion/id1238236587

End-to-end product design of a B2B2C mobile app connecting families building a home with their constructeur — designed from a brief in 2020, still live and adopted by home builders across France.

Role: Product Designer — the entire experience designed from a written brief, with no existing screens or design legacy to build on: information architecture, all flows, and the interface system from zero Client: UBITIK · Year: 2020–2022 · Platform: iOS & Android

Building an individual home in France takes 12 to 18 months. For the family, most of that time is a black box: the builder has the information, the client has the anxiety. Communication happens through scattered emails, phone calls to the office, and paper documents that get lost somewhere between the compromis and the remise des clés.

For builders, this is expensive too — every worried client is another call to handle, another email thread to dig through, another document to resend.

Design a mobile app that becomes the single channel between the client and their builder — not just during construction, but across the entire lifecycle of the home: from signing the contract to warranty claims years after delivery. The product had to work as a white-label platform: one design, many builders, each presenting it to their clients as their own service.

The key structural decision was to organize the product around the home's lifecycle rather than a feature list. Each phase of the client's journey maps to a dedicated space in the app.

During construction — visibility over anxiety. A typed activity feed (documents, e-signatures, site photos, completed milestones) so the client always knows what happened and what's next. A structured roadmap of the build — VRD, finitions, livraison, raccordement — that turns an opaque industrial process into a readable progress map. And deadline-driven reminders for the client's own obligations (open the water meter, contact the mairie), because delays are often on the client side: the app manages both directions of responsibility.

At delivery — the snag list, structured. Defect reporting with photos, intervention deadlines, status tracking (en cours / non traité / résolu) and a message thread per issue — replacing the classic paper snag list.

Living in the home — useful after the sale. A library of manuals for installed equipment, and seasonal maintenance advice with per-task notification opt-ins.

A typed event feed instead of a chat. Communication between client and builder is heterogeneous: documents to sign, photos, milestones, requests with deadlines. A generic chat would flatten all of it. The feed types every event and gives each type its own affordances — sign, download, reply, validate — keeping the history scannable months later.

Deadlines as first-class objects. Construction runs on dates. Every request, reserve and reminder carries a visible deadline with consistent treatment across the app — one visual language for urgency everywhere.

Designed for the least technical user. The buyer persona spans from young couples to retirees building their last home. Large tap targets, one action per screen, bottom-sheet confirmations for every destructive action, and plain-language French throughout.

White-label by structure. Builder identity lives in a contained set of surfaces — branding, contacts, step templates — while the core flows stay identical, allowing the platform to scale across builders without per-client redesign. The shipped product runs in nine languages.

The app shipped and is still live today — version 5.3.1, updated as recently as December 2024, years after design delivery. It has been adopted by home builders across France, who present it on their own websites as part of their client experience: Maisons et Chalets des Alpes offers it as a lifetime espace client "from the start of the worksite until after delivery"; Les Pavillons Montois positions it as their real-time construction tracking interface; MTC Maisons describes it as "a real communication tool that strengthens our relationship throughout your project".

An App Store review captured the product's reason to exist better than any pitch: "Finally, someone thought about tracking the construction of new homes!"

What this project demonstrates: designing a complete product system from a brief — information architecture, interaction patterns and content design — robust enough to survive years of evolution and scale as a multi-tenant platform.