Mobile app development
iOS and Android apps from one codebase, with the backend done right
We build cross-platform mobile apps with React Native and Expo — and the parts users never see but every app depends on: authentication, the API, privacy controls, in-app purchases, push notifications and store submission.
The app is the easy part
Screens are rarely what sinks a mobile app. What does is the backend that cannot enforce who sees what, subscriptions that the client — not the server — decides are active, push notifications that silently stop working, and a release process nobody can repeat.
We build the app and the system behind it together, so the mobile client stays thin and the rules that matter live on the server where they cannot be bypassed.
What we build
Consumer apps
Marketplace, community and lifestyle apps with profiles, matching, messaging and moderation tools.
Subscription apps
Freemium and subscription models with in-app purchases, where entitlements are decided on the server from store webhooks.
Companion apps for web products
A mobile client for your existing SaaS or platform, sharing its API, authentication and business rules.
Internal and field apps
Apps for staff on the move — checklists, data capture, scheduling — connected to your back-office systems.
What we build in from the start
Server-authoritative purchases
Subscription status comes from App Store and Google Play events (via RevenueCat) processed on the server, idempotently — the app asks what the user may do, it never decides.
Privacy by architecture
Sensitive data separated from what other users can browse, access rules enforced in the database, and media served through short-lived signed URLs.
Push that keeps working
Expo push with token pruning and server-side scheduling, so notifications reach real devices and dead tokens are cleaned up.
Repeatable releases
EAS build and submit profiles for iOS and Android with automatic version increments, so shipping an update is routine rather than an event.
Mobile work
Our own React Native product is where we test patterns before recommending them to clients.
From idea to the app stores
- 1
Scope the first release
One core journey done well, with the riskiest assumption tested first. Written scope and estimate.
- 2
Design the key flows
Clickable designs for onboarding and the core journey, reviewed before development.
- 3
Build app and backend together
Weekly builds you install on your own phone through TestFlight and internal testing tracks.
- 4
Store submission
Store listings, privacy disclosures, review guidelines and the account-deletion and data-safety requirements both stores enforce.
- 5
Measure and iterate
Crash reporting, analytics on the key actions, and regular releases based on what users actually do.
Technology we use
Mobile
- React Native
- Expo
- expo-router
- TanStack Query
- Zustand
- NativeWind
Backend
- Supabase (Postgres, Auth, Storage)
- Next.js API routes
- Node.js
- Firebase
Purchases & messaging
- RevenueCat
- Expo Notifications
- Resend
Release
- EAS Build & Submit
- TestFlight
- Google Play internal testing
Release and operations
Store accounts in your name
Apple and Google developer accounts, signing credentials and the app listings belong to your organisation.
Over-the-air updates
JavaScript-only fixes can ship through Expo updates without waiting for store review, within the stores' rules.
Store compliance
Privacy labels, data-safety forms, account deletion and sign-in requirements handled as part of the build.
Native when needed
React Native covers most apps. Where a feature needs native code we write native modules; if your app is graphics- or hardware-heavy we will say so before you commit. We also staff Flutter developers through our hire page.
What a mobile app costs
Our Mobile App MVP package starts at $41,900 for a focused first version on iOS and Android, through to store release. Apps with subscriptions, messaging, moderation and an admin portal cost more. We scope the first release tightly and give a fixed estimate for it.
- Number of user types and core journeys
- In-app purchases or subscriptions
- Real-time features such as chat
- Moderation and admin tooling
- Integrations with existing systems
- Privacy and compliance requirements
Who this is for
- Founders launching a consumer or subscription app.
- SaaS companies adding a mobile client to an existing web product.
- Businesses that need an internal app for staff in the field.
- Teams whose existing app has fragile purchases, push or releases.
Related services
Mobile App Development: common questions
Tell us about the app you want to build
Tell us what you are building or what needs fixing. You will hear back from an engineer — not a sales rep — within one business day, usually with questions or a rough approach.
Your enquiry goes straight to our engineering team — the people who will scope and build your project, not a sales desk.