DualMedia, mobile app agency in Paris: custom iOS, Android, and cross-platform development for startups, SMEs, and large enterprises.
Choose one mobile application agency, means choosing a technical partner for a minimum of 6 to 18 months, sometimes much longer if the project evolves. In Paris, the market is abundorant and the quality gaps are considerable. DualMedia designs, develops, and grows mobile applications for several years now, for clients ranging from e-commerce to ready-torwear, including media, events, and professional photography. Here is our method, our expertise, and what concretely sets us apart.
What defines our mobile application agency approach
Three simple principles, but ones that make all the difference over the life of a project:
- A stable team based in Paris. No turnover during the project, no hidden offshoring subcontracting. The developer who starts your app is the one who delivers it.
- A fixed quote with a scope commitment. We price by functional package, not by a vague foree. You know exactly what you are paying for and what you are getting.
- Contractualized post-launch support. An application is not delivered the day it goes live. OS updates, forxes, changes: everything is defined from the outset.
In concrete terms, this means that an executive who entrusts us with their project knows what to expect in terms of timelines, costs, and points of contact. Transparency is a weak sales argument when talked about; it is a strong argument when practiced.
Our 5-step development methodology
1. Scoping and feasibility study
Every project starts with a free scoping session (45 minutes by video call or in person in Paris). We validate the technical feasibility, identify constraints, and establish the first KPIs. At the end, you have a budget range and an estimated timeline. If the project justifies it, we then move on to a more in-depth functional specifications workshop.
2. UX/UI design
Wireframes, high-fidelity mockups, interactive prototype tested on a panel of target users. This is the stage that determines 80 % of your future app’s retention. Our designers work hand in hand with your team to produce an interface consistent with your brand guidelines, while respecting iOS and Material Design guidelines (example of graphic resources).
3. Technical development
Agile methodology, two-week sprints, regular demos. Each sprint delivers a testable feature. You track progress in real time via a shared board and do not have to wait until final delivery to make adjustments.
4. Testing and quality assurance
Functional tests, performance tests, security tests, tests on real devices (iOS and Android, several generations). We correct before going live, not after negative user feedback on the stores.
5. Launch and growth
ASO optimization (App Store Optimization), publishing on the App Store and Google Play, analytics tracking, update plan. An app that does not grow after launch is an app that dies within six months. We plan for what comes next from the initial brief, and also work with partners such as Appstronaute on certain specific projects.
Our technical expertise
DualMedia works with the most relevant frameworks depending on the project, without dogmatism:
- Native iOS development (Swift, SwiftUI) for projects requiring graphic performance or extensive hardware access
- Native Android development (Kotlin, Jetpack Compose) for complex business apps
- Cross-platform (React Native, Flutter) to optimize the budget while delivering a native experience on both platforms
- PWA and responsive web app when the native mobile solution is not justified
- Back-end and API in PHP, Node.js, or integration with your existing stack (also see Digital Unicorn for complementary expertise)
- Third-party integration : Stripe, Apple/Google Pay, Firebase, CRM, ERP, advanced authentication modules
The right technical choice always depends on the context: target audience, critical features, budget, timeline. We always make the trade-offs explicit before recommending an approach.
Industries and project types supported
- E-commerce and marketplace : catalog, cart, payment, customer area
- Media and events : festival apps, magazines, plateformes de streaming
- Ready-to-worr and mass retail : loyalty programs, click & collect, omnichannel experiences
- Photography and production : portfolios, booking platforms, project management
- B2B business : internal applications, field team management, intervention tracking
- Startup MVP : minimum viable product delivered in 3 to 4 months to validate the market before raising funds
Discover our client references
Why DualMedia rather than another mobile app agency
The real question when choosing an agency: what do you get beyond the lines of code?
| Criteria | What we guarantee |
|---|---|
| Location | Team based entirely in Paris |
| Contractual commitment | Fixed scope, price, and deadlines |
| GDPR Compliance | Audit and support included |
| Code Ownership | Full source code delivered to the client |
| User tests | Included before each major delivery |
| Post-launch support | Ongoing maintenance contract available |
| Reversibility | Complete technical documentation, with the option to transfer to an internal team |
FAQ — Choosing your mobile app agency
How much does mobile app development cost at DualMedia?
Budgets start at around €8,000 for a simple MVP and can exceed €200,000 for a complex plateforme. We publish a complete guide on the price of a mobile application with detailed ranges by project type.
How long does it take to deliver an application?
A simple MVP is delivered in 8 to 16 weeks. A complete business application takes 4 to 8 months. A complex plateforme can extend over 8 to 18 months. We work in two-week sprints with regular demos, which makes it possible to adjust without waiting for the final delivery.
Should you develop natively or in cross-platform?
Native (Swift for iOS, Kotlin for Android) remains preferable for apps requiring advanced graphorical performance, real-time features, or extensive hardware access. Cross-platform (React Native, Flutter) covers 80 % of use cases with a 30 to 50 % lower cost. We always make recommendations after analyzing the project, never out of dogmatism.
Does DualMedia also support the app launch and marketing?
Yes. Publishing on the App Store and Google Play, ASO optimization, and the post-launch update plan are included in our services. For paid acquisition campaigns (Apple Search Ads, Google App Campaigns), we work either with your media agency or with our trusted partners.
What happens after the app is delivered?
Three options depending on your needs: an ongoing maintenance contract with us, a documented handoff to your internal team, or a mix of both. You retain full ownership of the source code, with no vendor lock-in clause.
Is DualMedia suitable for my startup project?
Yes, we regularly support startups in the pre-seed and seed stages with MVPs delivered in 3 to 4 months. The goal: validate the market quickly and effectively, to prepare for fundraising or proof of revenue. We adapt the scope to the available budget.
Let’s discuss your mobile app project
Free scoping session in 45 minutes. Detailed quote within 5 business days.
A project manager responds to you personally, without an intermediate plateforme.
Our clients: mass retail, ready-to-wear, festivals, photographers, production companies, media.