01
Scoping & journeys
The three screens that matter, the key gesture: scoped on real usage.
N°03 · UNIVERSE[ ON THE STORES IN 10 WEEKS ]
Your service in your customers’ pocket.
iOS and Android, one codebase, one budget: store releases and updates handled for you.
10
WEEKS TO THE STORES
2
STORES · 1 CODEBASE
99.9%
CRASH-FREE SESSIONS TARGETED
Typical app in 10 weeks · budget scoped together on the discovery call
9:41
Hi LéaStudio NovaPilates · Paris, London, Zurich
TOMORROW · 6:30 PMReformerZurich Seefeld · 2 spots leftBook →
Studio Nova Reminder: your class starts in 1 hour
S2 · ServicesN°03
Mobile app development in Switzerland
N°01
React Native / Expo app
N°02
API & backend
N°03
Notifications & engagement
N°04
Store releases & care
S2b · IN DETAILN°03
Freelance mobile app developer: what you get
Mobile app development in Switzerland, for iOS and Android, by a freelance developer based in Mies (Vaud). A single React Native and Expo codebase delivers a native app on both platforms, with one budget and one point of contact, from the first mock-up to publication on the App Store and Google Play, and the follow-up after.
The offer is for service businesses, SMEs and entrepreneurs who want to put their service in their customers’ pocket: booking, customer area, ordering, request tracking. The starting point is not a feature list but the three screens that matter and the gesture your customers will repeat every week.
You get an app published on both stores, its secure and monitored API and backend, push notifications and deep links that bring customers back, offline mode designed in from the architecture, and store listings optimised to be found. Updates, Apple and Google reviews and crash monitoring stay with me.
The project runs in five steps: user journeys, architecture, development with a test build on your phone every week (TestFlight), store submission, then follow-up. A typical app reaches the stores in ten weeks. Every month, a report gives installs, retention, crashes and next actions.
I work remotely and by video call across Switzerland and France, and on site in Geneva by appointment, when the project requires it and as far as possible.
YOUR QUESTIONS
How much does it cost to develop a mobile app?
The cost depends on the number of screens and journeys, the integrations with your tools, the backend required and the level of finish expected. A single codebase for iOS and Android avoids paying for two apps. The budget is scoped with you on the discovery call, before any commitment.
Who can build a mobile app?
An independent mobile developer, an agency or an in-house team can build an app. With an independent full-stack developer, the same person designs the app, its API and its publication, then looks after it: you keep one point of contact from scoping to updates.
Why build a mobile app?
An app puts your service one gesture away from your customers: booking, ordering or tracking a request without looking for your website. Notifications and deep links bring them back, and the monthly report measures that return through retention instead of assuming it.
How do you build a mobile app?
You start by scoping the three screens that matter and the architecture, then build with a test version on your phone every week. Store submission and follow-up come next. A typical app follows this path in ten weeks, from the first mock-up to the stores.
S3 · The MethodA → Z
The method, step by step
“Projects change. The method never does.”
02
Architecture
Expo base, secured API, offline mode designed in from day one.
03
Build
A test build on your phone every week (TestFlight): you judge the real thing.
04
Stores
Submission, Apple and Google review, optimised listings: I handle the counter.
05
Store listings
Titles, screenshots and keywords tuned to be found on the App Store and Google Play.
06
Care & reporting
A report every month: installs, retention, crashes, next actions.
MONTHLY REPORT · EXAMPLE · Mobile Apps · SEPTEMBER 2026
2,340
INSTALLS
41%
D30 RETENTION
99.9%
CRASH-FREE SESSIONS
INCIDENTS: 0 · NEXT ACTIONS: 3
SENT 01.10 · GD
A report like this one, every month, in your inbox.
THE METHOD LEADS HERE.
S4 · How I work01 → 05
How I work
01Scoping
Goals, scope, budget: everything in writing.
02Architecture
Documented, justified technical choices.
03Development
Short sprints, a demo every Friday.
04Production
Automated tests, continuous deployment and alerts from day one.
05Observability
Errors, slowdowns and usage tracked continuously: problems show up before anyone reports them.
S5 · The stack6 TOOLS
The stack
One codebase, two stores: the mobile stack without a double budget.
React NativeTypeScriptExpoSupabaseSentryRevenueCat
S6 · ProofMIES, VD · CH
Why trust me with your project
EXHIBIT NO.1 · ORIZN
Co-founder and CTO of Orizn: your project gets the standard I hold my own product to.
01
A tooled process: automated tests, monitoring and a monthly report. Nothing relies on memory.
02
Your data stays protected: GDPR & Swiss FADP by default.
03
Based in Mies (Vaud), between Geneva and Lausanne. Remote across Switzerland, France and beyond. Reply within 24 business hours.
SAMPLE ENGAGEMENT
A network of Pilates studios in Paris, London and Zurich: a booking app in three languages, live on both stores in ten weeks.
S7 · ContactMON TO FRI 9 AM TO 7 PM · SAT 9 AM TO 6 PM · SWISS TIME · REPLY WITHIN 24 H
Let’s talk about your project.
Book a free discovery call
45 minutes, free, no strings attached. We talk about your project and you leave with an honest opinion, whether we work together or not.
NEXT AVAILABLE SLOTS · LIVE
MON TO FRI 9 AM TO 7 PM · SAT 9 AM TO 6 PM · SWISS TIME · REPLY WITHIN 24 H
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