SDO Your app, your website, your platform, custom-built.
See what we have builtfive apps and platforms live in production, todayWebsites, iPhone and Android apps, business platforms. Designed and built to measure, from the idea to production.
- 5 published apps and sites
- Multilingual text and voice translated live
- 1 single point of contact, end to end
Four product families, one studio.
And often two of them in the same project: a website that presents and attracts, an app that serves.
Professional websites
Showcase site, corporate site, online shop, private client area. Written from scratch, fast, multilingual, built to be found on search engines.
iPhone and Android apps
Ready to be published on Google Play and the App Store — with notifications, payments, offline mode and remote updates. Custom-built in React Native, from design to going live.
Web apps
The full product in the browser, installable on desktop and phone like an app, without going through the stores. Often the best place to start.
Business platforms and marketplaces
Several roles, several rights, several countries: marketplaces, member areas, internal tools, booking, training, complex international products.
Apps for every line of business.
The building blocks below — accounts, payments, notifications, dashboards, translation, scheduling, calls — run in production in our own apps. They combine for any industry: a trading app does not have the same screens as a concierge service, but both have accounts, payments, notifications, dashboards and rules to enforce.
And any sector that needs a tool that does not exist yet.
These are not eight different applications: it is the same foundation, proven on our platforms, dressed for each trade.
Finance, health, legal: a strict framework
Some fields follow precise rules, and we respect them from the design stage: data protection, notices and consents, operation logs, separation of roles. A trading tool gives no investment advice and manages no funds; a health tool makes no diagnosis. When a licence or a regulated partner is required, we say so before starting, and we build with them.
What you are probably looking for.
Five ways to begin — each explained on its own page, with its frequently asked questions and orders of magnitude.
- iPhone and Android mobile app
- Custom website
- Online booking and payment
- Installable web app
- Practices and professionals
Our own apps are published on Google Play — Orion Universe, Serena, Ménage Riviera, SDO Media — and SDO Studio itself, available on Google Play: we publish what we build.
Our platforms in production.
Designed, built and published by the studio, with real users — the best way to show what we can do. All are founded and run by the studio's founder, who operates every day what she builds: the screens below run in real conditions, with real payments and real obligations. They belong to one field, matchmaking and content; the engine that runs them serves all the others.
Orion Universe
Personal development universe — mobile and web
A daily universe of personal development and well-being: every day a mantra, a card and an affirmation; four subscription pillars — mind and sleep, body and breath, meditation, self-esteem — with a capsule written and voiced each morning, delivered at everyone's local time; a compass of guided paths, collectible boxes, initiations to read, listen to and watch, the universe's radio and TV, and consultations with an artificial intelligence. Mobile app on Google Play, web app, and the whole back office that runs it all.
- Fresh content every day, written and voiced by AI, reviewed before publication when it is paid
- Subscriptions with a trial period, one-off purchases, secure payment outside the app
- Multilingual end to end, prices shown in the local currency, notifications at local time
Serena
Mobile app and installable web app
A consultation platform with real human guides, designed to be simple: the same product on the phone and in the browser, from a single codebase. Guides are recruited on file, sign a charter and a contract online and are paid automatically; the client picks a guide, asks, the guide accepts, and the consultation opens — in writing, by audio or by video — billed by the minute from a wallet topped up online. Published on Google Play and installable straight from the site.
- Written, audio and video consultations, with an automatic interpreter between two languages: subtitles and voice
- Guide schedules and presence, per-minute wallet, packages, referrals, automatic payouts
- Reviews moderated before publication, reporting, reinforced security, full back office
What users see.
Screenshots taken on the two live platforms, as they display today on a phone.
Orion Universe
Serena
Scroll, or hover over the screens to see them face on.
The right product, not the biggest.
A successful digital product is not a pile of features: it is a tool your users understand at once, and that lasts.
What it must do, and what it will not
We start from what you want to achieve, and we write together what the product must do — and what it will not do. That saves you from paying for what you do not need.
One point of contact, end to end
Design, development, publication and follow-up are all done by the studio. You never have to coordinate several providers.
A foundation proven in production
Every project has its own identity and rules, but it rests on foundations already used every day in production. That is what guarantees proven building blocks and schedules that hold, instead of reinventing everything for each project.
What is genuinely useful, nothing more.
Depending on the product, we integrate what serves your business and your users.
- Payments and subscriptions
- Booking and schedules
- Messaging
- Audio and video calls
- Notifications
- Live translation
- Artificial intelligence
- Automations
- Accounts, roles and dashboards
- Security and authentication
Every product is different
We only build the features that are genuinely useful to your business and your users. A booking platform does not need video calls; an international platform cannot do without translation.
When it brings real value
When your project calls for it, we can integrate artificial intelligence, translation, voice processing, automation or smart assistance directly into your product — under control, and never in place of a human decision.
Your users understand each other, each in their own language.
Translation is not an option bolted onto the app: it is inside, from the first screen to the video call.
Everyone writes and reads in their own language
- Screens, menus and emails display in each user's language
- In messaging, each person writes in their language and reads the other in theirs, translated live
- Long content — sheets, booklets, notifications — is translated at publication
Talking without sharing a language
- During an audio or video call, what is said is transcribed and translated into live subtitles
- A voice message is transcribed, then translated for the person receiving it
- Texts read aloud by a voice are read in the listener's language
Many languages in production today, across Europe, Asia, the Middle East and the Americas — and more on request: the translation engine has no language limit, only the project decides.
From the first conversation to going live, in five steps.
Nothing starts with code. Everything starts with what you want to achieve.
Scoping
Your goals, your users, your constraints, your calendar. We write together what the product must do.
Design
Visual identity, components, animations, mock-ups of every screen. You see your product before it exists.
Development
In delivered, testable stages, never as a black box. Modular, documented code built to last.
Going live
Going live, payments in real conditions, legal notices and data protection. You receive a product that works.
What comes next
Monitoring, fixes, evolutions, new versions. A product lives; we stay at its side, at a fixed price, project by project, with no subscription.
After delivery: fixed-price interventions, project by projectGenuinely custom development
A project entrusted to the studio is handled end to end: design, every screen, development and going live. That is what the budget covers.
from €30,000
From €4,500 for a custom website. From €30,000 for an application, installable on phone and computer or published on the stores. Platforms — marketplaces, multi-country products, systems with several roles and several financial flows — start at €100,000, and the price follows the degree of sophistication: it is the complexity of the rules, roles and flows that makes the budget, not the number of screens.
Interventions after delivery are quoted at a fixed price, project by project, with no subscription. Third-party services — hosting, app store accounts, payment, email and SMS delivery, artificial intelligence, translation, calls — are opened in your name and billed directly by their providers: they belong to you, and the studio takes no margin on them.
Request a project studyWe explain everything.
Do you only build matchmaking platforms?
Do you work anywhere in France, and abroad?
How much does an app or a platform cost?
How do payment and follow-up work?
How long does it take?
What does the budget include?
Who pays for hosting, connected services and artificial intelligence?
Do I own my app?
And after going live?
Do I need a specification to write to you?
Can you take over an existing project?
SDO Media, a complementary activity.
The studio builds your products. To make them known, SDO Media — a separate activity — creates AI-generated content and videos, advertising creatives and Google Ads campaigns.
Let's talk about your project.
How does it work?
Tell us your idea, your goals and the broad lines of your need, even without technical vocabulary. We study your request and come back to you within two working days to decide the best way to continue — in writing, by phone or by video call if it helps the project.
Send us a messagePrefer to describe your project in ten questions
Answer what applies to you — even partially. You receive a first reading of your project, with no commitment.