50+
projects delivered
iOS app, Android app or web platform: give your users a fast, seamless experience.
In just a few weeks, our team designs and builds robust, secure applications with you, in React Native.
3–5
weeks to a V1
1
dedicated project lead, with you A to Z
Fixed price
Quote locked in before we code
Startups and solo founders: building an MVP to launch your project
The problem : You need to validate a tech product idea on the market, but you're wondering how to build a mobile or web app without spending all your savings? You need a concrete, functional, professional product to convince your first users or win over investors.
Result : we apply a strict methodology: we strip away everything superfluous to isolate your "Core Feature" (the killer feature). We then build an ultra-fast, clean, optimized MVP, ready for market. Ideal for raising funds and gathering your first user feedback.
Do you recognize your situation in one of these problems? Let's talk about it!
As your business grows, managing information becomes your main challenge. Centralizing company data, streamlining document exchanges with your clients, and connecting your team on a shared tool can no longer be done with generic software. That's exactly when building a custom application (web or mobile) becomes essential to structure your growth.
The question of a custom application then arises. But how do you choose between a web-app accessible via a simple link and a mobile app downloadable from the store? Here's our practical guide to help you make the right choice.
1/3
Where do your users work?
What if I have just as many answers pointing to the Web-App as to the mobile app?
Choose hybridization! At Horizon Factory we build 2-in-1 apps. We create a Web-App that serves as the technical core (back-office, database, admin tool), onto which we graft a small, ultra-targeted mobile app for mobile users (e.g. a web logistics platform for managers, and a simplified mobile app for delivery drivers in the field).
We show you what you gain
at every step.
Scoping
1 week or moreWe define the exact scope of your V1 together. We challenge your ideas, advise you and prioritize what really matters. Whether it takes 2 meetings or a full month, we adapt to your pace and reassure you along the way.
What you gain? You invest only in the features you need and clarify your vision before spending a single euro on development.
UX design + dev
Weeks 1 to 2To save time, we design the interfaces and the app's logic at the same time. Mockups are validated with you as we go, to avoid any bad surprises at delivery.
What you gain? You concretely visualize your future tool from the first days and validate the user experience before real coding starts.
Development
Weeks 2 to 8We move forward in 2-week sprints with regular demos. Thanks to our weekly meetings, you follow your project's progress in real time. Your product comes to life and you can already demo it to your clients, to validate every choice.
What you gain? Total transparency. You keep constant control over your product and can adjust anything if needed.
Go-live
Week 8 (+ store review time)This is the big day: secure deployment and guided onboarding for your teams. We deliver the entire project: the intellectual property and the code belong to you from day one. For a mobile app, we also factor in the App Store and Google Play review time.
What you gain? A ready-to-use tool, autonomous teams and total independence.
We show you what you gain
at every step.
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Scoping
1 week or moreWe define the exact scope of your V1 together. We challenge your ideas, advise you and prioritize what really matters. Whether it takes 2 meetings or a full month, we adapt to your pace and reassure you along the way.
What you gain? You invest only in the features you need and clarify your vision before spending a single euro on development.
The dynamic portfolio that turns your professional recommendations into proof of skill.
- Context
- Skills only have impact when they're proven and backed up concretely. Yet professional recommendations are often scattered, hard to see and hard to showcase. RecomMe wanted to give professionals a simple way to create, receive and share a real portfolio of skills and experience, backed by concrete recommendations.
- Challenge
- Make it easy for anyone to ask their references and gather credible evaluations, then showcase them in a modern, clear, shareable portfolio, all on a smooth interface with a design people actually want to use.
- What we did
- An HR Tech web app built in Next.js, with real UX/UI craft and personalization. Users request references through a guided form, receive visual skill evaluations, and gather experience, projects and recommendations into a single dynamic, shareable portfolio.
- Result
- A next-generation portfolio that gives weight to recommendations and lets every professional stand out through proof, not just words.
Calculating ROI isn't just about knowing the numbers — it's about turning an expense into a strategic investment. For a business leader, this calculation matters for three reasons:
The calculation method depends on your application's business purpose:
For an internal application or business tool
ROI through time saved
Enter your numbers to estimate what the application would save you.
Hours saved / week
Hourly cost
People
Weeks per year52
Dev cost
When does the tool pay for itself?
Paid back
06121824 months
Pays for itself in
2 months
Estimated gain in year 1
65,000 €
For a SaaS or consumer application
ROI through customer value
The maths then goes through CAC (customer acquisition cost) and LTV (lifetime value). We run it together on our first scoping call, with your own figures.
During our first exchanges, you share your needs and expectations with us so we can best define your ROI and calculate a budget to allocate to development.
We build fast, in 6 to 8 weeks, not 6 months
We speed up development with AI: base code generation and rapid prototyping, so our engineers can focus on architecture, business logic and product quality.
We define a strict scope before writing code
A good tool is a useful tool: we challenge your organization, your processes and your wishes before writing a single line of code. Fewer superfluous features, but the right ones — the ones that validate the product, drive adoption and avoid wasted budget. And we never propose a mobile app if the scope doesn't justify it.
We offer clear, controlled pricing (fixed-price or time & materials)
For your V1 launch, we favor a fixed price: the quote is locked in at signature so you avoid bad surprises at the end of a sprint. You know exactly what you're paying. And if your project needs maximum flexibility or extra team capacity, we adapt with a time & materials formula (daily rate). So you always keep control over your investment.
We guarantee total sovereignty and independence
Faced with the traps of No-Code solutions, where subscription bills climb exponentially as your app gains users, we made the opposite choice. From production launch, we transfer the intellectual property of your product to you. We build on standardized, open-source, recognized technical stacks to guarantee full sovereignty.
We secure your project with our senior engineers
Faced with the market of junior freelancers or limited No-code, we prefer engineering rigor. Your tools are built by engineers trained at top schools, guaranteeing clean, documented, secure code designed to grow with you. The day your software goes from 10 to 10,000 users, the application stays stable, smooth and performant!
Handing your project to a freelancer can seem appealing on paper, but building an application requires skills that go far beyond what a single person can cover. Here's why our agency structure protects your investment and your project:
The most common questions we get, seen from our clients' side.
If you're not satisfied at the end of a sprint, we talk about it before moving on. Our weekly meetings are there to validate the product as it's being built. If something doesn't match your expectations, we adjust immediately — you never wait until final delivery to discover your software.
