Mobile App Development
An app that behaves correctly offline, on real devices — not just in a simulator.
from €16,900
The Problem
Mobile isn't web with a smaller screen. Offline behaviour, device APIs, app-store review, and platform-native conventions are a genuinely different discipline — one a generalist web team routinely underestimates until the first rejected submission.
- An app that works perfectly on Wi-Fi in the office and falls over in the field with no signal
- A build that passes every internal test and still gets bounced by App Store review
- An interface that "ports" a web layout instead of respecting how iOS or Android actually work
What's Included
Offline-first data handling
where the use case needs it — sync, conflict resolution, local storage, specified up front.
Native device APIs used correctly
camera, location, push, biometrics — not simulated web equivalents.
Platform-native UX conventions
for iOS and Android, not one design forced onto both.
App-store submission handled end to end
including the review checklist most teams discover the hard way.
A backend/API layer scoped to mobile constraints
(payload size, retry logic, battery cost).
Who It's For
Perfect for
- Product teams building a field-service, logistics or consumer app with real offline needs
- Founders whose product is mobile-first, not a web app with an app wrapper
- Teams adding a mobile companion to an existing web product
Outcomes
- An app that works correctly with no signal, not just a spinner and an error
- A submission that passes store review the first time, because the checklist was built in
- A codebase your own mobile engineer (present or future) can maintain
Packages
TIER 01
Single-platform App
One platform, done properly — iOS or Android, your choice.
from €16,900
→ 8–10 weeks · starts within 3 weeks
- Specification covering offline behaviour, device APIs and platform UX conventions
- Native build (Swift for iOS, Kotlin for Android) or React Native for a shared logic layer
- App-store account setup guidance and submission handling
- Backend/API integration, scoped to the app's needs
- Source code and documentation, transferred on final payment
BEST FOR A defined single-platform user base — internal field teams on company-issued devices, for example.
TIER 02
Cross-platform App
iOS and Android from one codebase, native where it counts.
from €21,900
→ 10–12 weeks · starts within 3 weeks
- Everything in Single-platform App, built for both stores
- React Native architecture with native modules where a platform API demands it
- Submission handled for both App Store and Google Play
- Source, documentation and credentials, transferred on final payment
- 30 days of post-handover bug-fix cover
BEST FOR Consumer or field apps that need both platforms without duplicating the whole build.
TIER 03
App + Backend
The app and the backend/API it depends on, built together.
from €33,500
→ 14+ weeks · starts within 4 weeks
- Everything in Cross-platform App
- A backend/API built specifically for the app's data and offline-sync needs
- Push notification infrastructure and authentication
- Phased delivery with demo milestones, source transferred on final payment
BEST FOR A mobile product launching with no existing backend to integrate against.
How This Engagement Runs
Survey
We read the device constraints, the environments the app runs in (connectivity, hardware), and any existing backend APIs it needs to talk to.
Specification
Platform choice, offline strategy, and API contracts are written down and priced.
Build
Weekly increments, demoed on real devices, not just a simulator.
Verification
Tested against real network conditions and the store review checklist before submission.
Handover
Source, store-account access notes and documentation transfer on final payment.
Capability Example
An illustrative engagement, written from how we work. Client details are withheld and no outcome figures are claimed.
What we build with
- React Native
- Swift
- Kotlin
- TypeScript
- Firebase
- REST / GraphQL
- App Store Connect
- Google Play Console