Web and mobile app development.
Client portal, booking tool, marketplace or SaaS: we design and build your app, from the first version to publication.
Web app
Built with Next.js, React and TypeScript, accessible from a browser.
↗Mobile app
iOS and Android apps with React Native and Expo, from a shared codebase.
↗Database and API
REST or GraphQL API, database and user account management.
↗Custom back office
An admin interface to manage your content, users and data.
↗Usage-centred design
Flows and mockups approved before development, to avoid building the wrong tool.
↗Deployment and maintenance
Production release, store publication and maintenance as needed.
↗Types of apps
A clear process
Scoping
Users, needs, priorities: we define what the first version should include.
Design
Flows, mockups and technical architecture, submitted for approval.
Development
Step-by-step development, with test versions at each major milestone.
Publication
Production release, store publication, then fixes and improvements.
Start with a first version
An app quickly becomes expensive if everything is built at once. It is better to release a first version with the essential features, test it with real users, then invest in what is actually used.
What to plan for after launch
Development is not the only cost of an app:
- Hosting, database and third-party services, such as email or notifications.
- Apple and Google developer accounts, if you publish on the stores.
- Updates, because iOS, Android and store rules keep changing.
- Security: backups, patches and access-rights checks.
Apps and platforms delivered
A few real projects, from a booking platform to an online service.
Darsouk
Booking platform & marketplace · Algeria
Discovery and booking platform for local businesses in Algeria: restaurants, hotels, salons, spas. Directory, online booking, classified ads and a business area, in French, Arabic and English.
Declastart
LegalTech platform · France
Online company-formation platform: articles of association, capital deposit and trade-register filing. Guided flow, search engine and an optimised conversion funnel.
Saillow
Social video streaming platform · France
Video streaming platform with watch parties: friends watch the same video in perfect sync while chatting in a live voice room.
Frequent questions
How much does an app cost?
Our web and mobile apps start at €4,500. The price mainly depends on features: accounts, payments, messaging, administration or connections to other tools. Quotes are free and sent within 24 hours.
How long does it take?
Allow 6 to 12 weeks for a first version, from approval of the quote and content. A feature-rich project may take longer.
Should I build a mobile or a web app?
A web app is often enough to start: it works on every device without going through a store. A mobile app is useful if people use it often or need notifications or phone features.
Have you already published an app?
Yes. The Darsouk app, a booking and classified-ads platform in Algeria, is published on Google Play under the name Peacemaker Design.
An app project?
Free quote within 24 hours. First call free to define your first version.