HnB Digital
Hello Brian — Professional English coaching app
iOS and Android mobile app for AI-powered professional English coaching. Campfire Digital delivered the complete package: Flutter app, Firebase backend, Vertex AI integration, backoffice, Next.js website and animated 3D mascot.
The app
A complete Flutter app, from idea to store
Campfire Digital designed and built the entire Hello Brian application — Flutter frontend, Firebase backend, Vertex AI integration for personalised feedback, subscription management via Stripe and In-App Purchase on the App Store and Google Play.
The mascot
Brian — a 3D mascot with full animation capability
Campfire Digital supplied the Brian mascot as a complete 3D asset created with Reallusion, with full animation capability. Brian is animated directly within the app to guide users through every step of their journey.
The website
Next.js website · hellobrian.fr
Alongside the app, Campfire Digital built the hellobrian.fr website using Next.js, Tailwind and Vercel — designed to convert and rank.
The backoffice
Content management backoffice
To allow the HnB Digital team to manage their exercises and content independently, Campfire Digital built a bespoke backoffice — managing exercises, categories, levels and users.
Project team
Built by
Mat Wright
Project lead · Lead developer
Developing our Hello Brian app was an ambitious project: we had a clear vision of the product and its uses, but no development expertise. Working with Matthew Wright and Campfire Digital was decisive. Matthew understood our challenges from the very start. Particularly available and attentive, he helped us formalise our needs without having to master technical jargon, absorbing all the complexity while bringing expert insight on generative AI and LLMs. Committed, flexible and highly reliable, he always met his deadlines with robust deliverables, often exceeding our expectations. Matthew's involvement gives you the feeling of having a key team member on board. Thanks to him, we were able to move forward with complete confidence and focus on our added value, trusting him with the keys to the tech. We can't wait to take our MVP to market!
Morgane & Sarah
Co-founders · HnB Digital
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