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I build digital tools that bring in customers and keep them coming back. From first conversation to post-launch support, every project is built to perform.

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Mobile apps

Mobile apps for iOS and Android.

One React Native codebase for both platforms. Coded in Paris, built for the European market.

Your customers are on their phones right now. A well-built native app puts your service in their hands, in weeks instead of months.

Start your projectSee Unpost (case study) →
Screenshot of the Unpost iPhone app, bulk message deletion on Discord, Slack, Twitter, Reddit, Instagram
5 platformsOne app
iOS + AndroidReact Native

Unpost app, bulk message deletion · Live on App Store and Google Play

● LiveUnpost: 5 platforms integrated (Discord, Slack, Twitter, Reddit, Instagram) · iOS + Android from one React Native codebase · Privacy-first, local credential encryption.

Pricing

Three tiers based on app complexity.

Every tier includes iOS + Android development, full Apple App Store and Google Play Store submission, and 30 days of support after launch.

01 · MVP4 to 6 weeks

Fast validation app

€5,000to €12,000

Startups and entrepreneurs who want to validate a mobile idea quickly, or SMBs that need a simple internal business tool.

Simple booking app, field tool for teams, time tracking app, market validation MVP.

  • ●3 to 5 main screens
  • ●iOS + Android (React Native)
  • ●Lightweight backend (Firebase or equivalent)
  • ●Basic push notifications
  • ●App Store + Play Store submission
  • ●30 days of support
Start an MVP →
02 · Standard6 to 10 weeks

Complete professional app

€12,000to €25,000

Companies with an established user base who want a robust app to retain customers, take bookings, or sell.

Booking app with payment, loyalty program, mobile e-commerce, on-demand services app.

  • ●8 to 15 screens
  • ●Authentication + user profiles
  • ●Targeted push notifications
  • ●Integrated payment (Stripe + Apple Pay + Google Pay)
  • ●Custom backend API
  • ●Store submission + 30 days of support
Start a pro app →
03 · Advanced10 to 16 weeks

Custom complex app

€25,000to €50,000+

Companies with specific business needs, marketplaces, mobile SaaS, or apps with multiple third-party integrations.

B2B mobile marketplace, full mobile SaaS, multi-platform app with multiple API integrations (like Unpost), medical or financial app.

  • ●15+ screens with advanced UI
  • ●Offline-first mode
  • ●Multiple integrations (CRM, ERP, payment, analytics, third-party APIs)
  • ●Custom backend + admin dashboard
  • ●Multilingual (FR / EN / DE)
  • ●Technical documentation delivered
Discuss a custom app →
See the full pricing grid →
Why me

You talk to the developer, not a salesperson.

Portrait of Mohamed Sahbi, senior developer and founder of WebCraftDev
● Paris · Île-de-France
“Every screen of the app reflects what we decided together.”

On a mobile project with an agency, your brief passes through 3 or 4 hands before reaching the code. Salesperson, project manager, designer, junior developer. Any scope change means a change request. And the code is often delivered by someone who knows neither your business nor your constraints.

Here, you talk directly to the person writing the code. Feedback is implemented in hours, not days.

Mohamed Sahbi

Senior developer, founder of WebCraftDev

Live references

A live app, concrete proof.

● Unpost · 5 platforms
Screenshot of the Unpost app settings screen with 5 connected platforms
Featured · Unpost5 · platforms integrated

Bulk message and post deletion app for Discord, Slack, Twitter, Reddit, and Instagram. Privacy-first architecture: credentials encrypted and stored locally on the device, zero data on remote servers. Live on App Store and Google Play from a single React Native codebase.

5
Platforms
RN
React Native
0
Remote cred.
See the Unpost case study →View on App Store ↗
iOS + AndroidLive on both stores

Unpost shipped on Apple App Store and Google Play Store from a single React Native codebase. One team, one version, evolving in parallel across both platforms.

0Credentials on remote servers

Privacy-first architecture: every account credential (Discord, Slack, Twitter, Reddit, Instagram) is encrypted and stored locally on the device. Zero data on external servers.

Process · 3 steps

From brief to App Store, no surprises.

01Week 0

Free discovery call

30 minutes over video. We talk about your app, your target market, and your budget. I give you an honest read on which tier fits (MVP, Standard, or Advanced) and what's feasible in your range.

Diagnostic delivered · 30 min
02Week +1 to +2

Testable prototype in 10 days

Interactive mockups delivered in 10 business days. You test on your own phone via TestFlight (iOS) and Android builds. Scope validated before main development. Three milestone payments: 30% / 40% / 30%.

30%40%30%
03Weeks +4 to +16

Development + store submission

Weekly sprints with demos on your phone. Full Apple App Store and Google Play Store submission included. 30 days of support after launch.

Stores included · 30 days support
Why Europe

Built for European users.

European mobile users have specific expectations. GDPR compliance, support in their language, local payment methods. An app designed for the US market and hastily adapted shows immediately.

I design for Europe from the first mockup: GDPR by design (explicit consent, right to erasure, data hosted in Europe), multilingual interface (French, English, German at minimum), local payments (Stripe France, SEPA, Apple Pay, Google Pay), and cross-border tax compliance if your customers go beyond France.

GDPR by designConsent, erasure, EU hostingMultilingualFR / EN / DE by defaultLocal paymentsSEPA, Stripe FR, Apple Pay, Google Pay
FAQ

Frequently asked questions.

A question that isn't covered here? Email me directly at mohamed-sahbi@webcraftdev.com or WhatsApp at +33 7 84 85 21 49.

mohamed-sahbi@webcraftdev.com+33 7 84 85 21 49
How much does a mobile app cost in 2026?+

€5,000 to €12,000 for a simple MVP, €12,000 to €25,000 for a complete pro app, €25,000 to €50,000+ for a custom complex app (marketplace, mobile SaaS, multiple integrations). The 3 tiers are detailed above on this page. Exact quote after our discovery call.

Why React Native rather than Flutter or native (Swift / Kotlin)?+

React Native is the standard for cross-platform apps in Europe. Native performance, mature ecosystem, and the same frontend developers as for the web. Unpost, for example, handles 5 API integrations (Discord, Slack, Twitter, Reddit, Instagram) from one React Native codebase, on iOS and Android. Flutter is solid but has a smaller community and a less mature library ecosystem for European integrations. Native (separate Swift and Kotlin) doubles the cost and timeline. For 95% of projects, React Native is the right choice.

Do you really need separate iOS and Android apps?+

No. A single React Native codebase generates two native apps, one for iOS and one for Android. Users see no difference from a pure native app: same fluidity, same features (camera, GPS, push notifications, payments). The difference is in your budget and timeline, not in the user experience.

Who handles App Store and Play Store submission?+

I do. Full submission to the Apple App Store and Google Play Store is included in every tier. Developer account creation if needed, listing configuration, screenshots, descriptions, and Apple and Google review handling.

What about Apple and Google fees?+

Apple developer account: USD 99/year. Google developer account: USD 25 lifetime. These fees are paid directly by you to Apple and Google, not through me. For in-app payments: 30% the first year, then 15% after (App Store and Play Store apply the same commissions). For external payments (Stripe, SEPA transfers), zero store commission.

What about maintenance after launch?+

30 days of free support included in every tier (bug fixes, minor adjustments, monitoring). After that, monthly maintenance starting at €300/month for ongoing support. If you prefer to handle it yourself, the code is on your Git repository and you can hire another developer.

Do you only work with French companies?+

No. I work with companies across Europe: France, Belgium, Switzerland, Luxembourg, Germany, Austria. I communicate in French, English, and German. All exchanges happen remotely via video, email, and messaging. Distance has no impact on quality or responsiveness.

→ Start

Let's talk about your app.

Tell me what you want to build. I'll tell you exactly which tier fits, what it'll cost, and how long it'll take.

Start your projectSee Unpost (case study)

Reply within 24h Monday to Friday.

mohamed-sahbi@webcraftdev.com · +33 7 84 85 21 49

WebCraftDev, led by Mohamed Sahbi, senior developer based in Paris. iOS and Android mobile app development in React Native for the European market (France, Belgium, Switzerland, Luxembourg, Germany, Austria). Three tiers: MVP from €5,000, pro app €12,000 to €25,000, custom app €25,000 to €50,000 and more. Full Apple App Store and Google Play Store submission included. GDPR by design, local payments, multilingual by default.

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