Where do we start?
You have a strong idea, but no clear roadmap to turn it into a usable product.
Custom
mobile app
development
From strategy to launch, we build iOS and Android apps focused on measurable business outcomes, not vanity metrics.
You have an app idea, but too many uncertainties
Most founders and teams face the same blockers before launch.
Fear of costs
Without proper discovery and scope definition, budgets can quickly drift.
Agency trust issues
Vague promises, unclear timelines and poor transparency create risk.
Technical complexity
Architecture, stores, security, analytics and stack decisions can be overwhelming.
End-to-end support with strong product thinking
We reduce risk and accelerate delivery through clear decisions, clear priorities and clear execution.
End-to-end support
Discovery, roadmap, execution and launch with full visibility at every step.
Product strategy + development
Not just code: business goals, UX and technical feasibility are aligned from day one.
MVP-first approach
Launch useful features fast, validate demand, then scale with confidence.
Web + mobile complementarity
In many cases, a custom website and a mobile app reinforce each other.
Still hesitating between a mobile app and a responsive website? Read our comparison: mobile app or responsive website.
A mobile offer that fits your maturity stage
Custom mobile app development
iOS and Android products tailored to your business goals, constraints and roadmap.
Fast MVP to test your idea
Build the essentials first, validate real usage, and reduce financial risk.
Existing app redesign
Code recovery, UX upgrade, performance optimization and stabilization.
Maintenance and evolutions
Bug fixes, store updates and continuous feature delivery after launch.
What types of mobile apps do we build?
Apps designed for real usage
We do not build showcase-only apps. Every project starts with one practical question: what concrete value should users get on mobile? Then we define the most useful scope to launch fast and learn fast.
Depending on your context, we design marketplace apps, business apps, mobile SaaS apps or e-commerce apps. The objective stays the same: deliver a clear, stable and scalable mobile product.
How much does mobile app development cost?
The right budget depends on the right decisions
Mobile app cost depends on actual scope: number of screens, UX/UI level, business complexity, backend, API integrations, payments, push notifications, geolocation, messaging, back-office and analytics. That is why there is no universal fixed price.
Our approach is to define a first investment milestone, then launch a useful MVP. You validate the market early, reduce risk, and invest next on features that prove business value.
An MVP usually starts from a few thousand euros depending on scope. A full business app or marketplace generally requires a higher budget, especially with backend, payments, notifications, messaging and admin features.
What features can be included in a mobile app?
Depending on your model (marketplace, business app, mobile SaaS or e-commerce), we build the right baseline for launch.
User journey features
- Account creation
- Social authentication
- User profiles
- Messaging / chat
- Favorites
- Push notifications
Business and operations
- Online payments
- Geolocation and mapping
- Marketplace features
- Admin dashboard
- API / existing software sync
- Product analytics and KPI tracking
- App Store and Google Play publication
Instead of shipping everything at once, we prioritize what delivers value from version one. You keep a clear roadmap with progressive releases after launch.
A clear process that builds confidence
- 1
Discovery
Goals, priorities, scope, budget target and realistic timeline.
- 2
UX / Prototype
User flows and clickable prototypes to validate the experience before coding.
- 3
Development
Incremental implementation with regular demos and product decisions.
- 4
Testing
Functional, stability and performance checks before publication.
- 5
Launch
Store publication, analytics setup and launch monitoring.
- 6
Continuous improvement
KPIs, user feedback and prioritized iterations to keep improving outcomes.
React Native, Expo and Node.js to ship faster
Modern stack, solid performance, faster time-to-market and optimized costs.
React Native
Shared codebase for iOS and Android with production-grade performance.
Expo
Faster development cycle, testing and deployment.
Node.js
Scalable API backend aligned with mobile product growth.
Business benefits
Reduced cost versus two separate native apps, without sacrificing speed.
React Native, Flutter or native development: what should you choose?
React Native
Usually the best speed-cost-quality trade-off for MVPs, marketplaces, business apps and mobile SaaS products that need iOS and Android quickly.
Flutter
A strong cross-platform option too. The right choice depends on product constraints, team context and long-term maintainability goals.
Native
Still relevant for specific cases with very advanced performance, hardware or platform-specific requirements.
Our practical stance
We generally prioritize React Native + Expo for execution speed, maintainability and ecosystem maturity, while staying pragmatic for each product.
Real projects, real outcomes
Venta Moto
Motorbike marketplace app
Problem: build a reliable buying/selling platform for enthusiasts.
Solution: full mobile app with listings, chat, ratings and ASO.
Result: 5,000+ downloads and 4.9/5 average rating.
Poulichon
Second-hand fashion marketplace
Problem: structure a marketplace for the Canadian market.
Solution: product pages, payments, messaging and transactional logic.
Result: a fully operational peer-to-peer experience.
Epicuremee
Culinary events mobile app
Problem: move from idea to launch-ready product.
Solution: full support: UX, app development, landing page SEO, ASO.
Result: a coherent product ready for market activation.
Why launch a mobile app today?
Mobile is no longer optional. For many brands, it is the primary customer touchpoint.
A well-built mobile app creates a direct and recurring relationship with your users. You become less dependent on third-party platforms and can make better decisions using product data.
For startups, SMBs and established companies, this often means stronger conversion, better retention and more operational efficiency. With an MVP mindset and a modern stack, you launch fast and improve with evidence.
Still comparing options? Read: mobile app or responsive website.
Frequently asked questions about mobile app development
How much does a mobile app cost?
Cost depends on scope, number of screens, UX/UI level, backend complexity and integrations. Features like online payments, push notifications, geolocation, messaging, analytics and admin tools can significantly change the budget. We recommend defining a first investment milestone with an MVP instead of building everything upfront. This reduces risk and gives you real market feedback early. In many cases, an MVP starts from a few thousand euros depending on scope, while a complete business app or marketplace usually requires a higher budget and a staged execution plan.
How long does it take to build a mobile app?
Timeline depends on product complexity and preparation level. A focused MVP can often be launched within weeks if scope is clear and decisions are quick. A broader app with backend, multi-role permissions, advanced flows or marketplace logic usually takes several months with incremental releases. We work with visible milestones and regular demos to avoid delays and misalignment. The objective is to release useful value early, then iterate based on user behavior, feedback and product KPIs rather than assumptions.
Should we choose React Native, Flutter or native development?
There is no one-size-fits-all answer. React Native is often ideal when you need iOS and Android quickly with controlled cost and strong maintainability. Flutter is also a valid cross-platform option depending on team context and product requirements. Native development remains the right choice for specific cases with advanced platform constraints. At L&M Prod, we usually recommend React Native + Expo for MVPs, marketplaces, business apps and SaaS products, but final decisions are always based on your product goals, constraints and long-term roadmap.
Can we start with an MVP?
Yes, and in most situations it is the safest way to start. An MVP focuses on essential features so you can test demand, validate your value proposition and collect real usage data before scaling investment. This approach avoids expensive overbuilding too early. Once the first version is in production, we prioritize next iterations by impact: conversion, retention, reliability, UX quality and business outcomes. You keep tighter budget control and a roadmap aligned with evidence rather than assumptions.
Can L&M Prod publish the app on the App Store and Google Play?
Yes. We support build preparation, developer account setup, store listing content and submission workflows for both App Store and Google Play. We can also help with launch visibility and early post-release optimization. The goal is to reduce friction and prevent late-stage blockers linked to compliance or release setup. You keep a clear checklist of what is ready, what still needs validation and what actions remain before production launch.
Do we need a full specification document before starting?
No. You can start with a business need, an idea or a target outcome. We help you structure discovery through user targets, critical flows, feature priorities, technical constraints and initial budget assumptions. This gives you a practical launch direction without requiring heavy documentation upfront. In many projects, this leads to faster and more relevant decisions than writing an exhaustive specification too early.
What happens after launch?
Launch is only one milestone. After release, we monitor stability, user feedback and product KPIs to prioritize improvements. This includes bug fixing, technical updates, UX optimization and progressive feature delivery. The objective is to grow product value in measurable steps, not add features randomly. A structured post-launch phase helps keep the app reliable, improve retention and align future investment with business impact.
Do you also build the backend for the app?
Yes. We can design and build APIs and backend architecture for authentication, data management, roles/permissions, admin workflows and third-party integrations. We mainly use Node.js and TypeScript for scalable and maintainable backend foundations. Depending on product needs, we integrate Stripe, push notifications, file storage, analytics and external APIs. This ensures consistency between mobile experience and server-side operations from day one.
Do you only work in Chambery or across France?
L&M Prod is based in Chambery, Savoie, and works with clients across France. We collaborate with entrepreneurs, startups, SMBs and larger companies in both local and remote setups. We regularly support projects in Chambery, Aix-les-Bains, Annecy, Grenoble and Lyon while maintaining the same process quality remotely. What matters most is clear scope, regular communication and reliable execution.
For budget details, read: how much does a mobile app cost.
Let's make it concrete
Let's talk about your mobile project
No detailed specification yet? That's fine. Share your idea, goals and an approximate budget. We will reply with a practical first direction.