Mobile app development for iOS & AndroidOne codebase. Both app stores. No second team.
Your users keep asking for an app, and every quote assumes two teams. We build iOS and Android together in React Native and Expo, share code with the web product you already have, and take it all the way through store review, which is exactly where most first apps stall.
/ In plain terms
What is cross-platform mobile app development?
Cross-platform mobile app development means building one application from a single codebase that runs on both iOS and Android. Frameworks such as React Native render real native interface components, so the app looks and behaves like a native one while most of the code is written once instead of twice.
/ Not ready to book a call?
Get a free teardown of your website first.
Send us your address and we email you the three changes we would make first. Specific, free, no pitch attached.
/ The tell
Find the sentence that describes your week.
The things you would already have noticed if a mobile app applied to you.
- Customers keep asking for an app and you keep quoting two separate teams.
- Your web app works on a phone, but people want notifications and a home-screen icon.
- You already have a web product and an API, and the app should reuse them.
- A previous app was rejected in store review and nobody knows why.
- You need the app to keep working when the signal drops.
/ What lands in your hands
What you actually receive.
Concrete things, not a statement of intent. This is what is included in a mobile app build.
iOS and Android builds
One React Native codebase producing both apps, with platform-specific polish where users would notice.
Design for small screens
Screens designed for thumbs and short sessions, not a web page squeezed onto a phone.
Push notifications
Set up for both platforms, with sensible defaults so users keep them switched on.
Authentication and API
Sign-in, secure token storage, and a connection to your existing back end or a new one.
Store submission
Listings, screenshots, privacy declarations and review responses for the App Store and Google Play.
Release pipeline
Automated builds and over-the-air updates, so a small fix does not wait for a full store review.
/ Proof
Work you can open, not a promise.
We do not have a public mobile case study to show yet, because the mobile projects we have built are private. Ask about them on the discovery call and we will describe what we built and how. The web products in our case studies show the same engineering standard applied to accounts, payments and real-time data.
/ How it runs
Four stages. No surprises.
8 to 14 weeks. You get a fixed timeline and a fixed price in writing before any code is written.
- 01
Scope and flows
Weeks 1 to 2We define the core flows for version one and check them against App Store and Google Play rules before design starts.
- 02
Design and build
Weeks 2 to 10Screens are designed and built together, with a test build on your own phone every week.
- 03
Beta
2 weeksTestFlight and Play internal testing with real users, and fixes for what they find.
- 04
Submission and launch
LaunchStore listings, review, and release. We handle rejections and resubmissions if they happen.
/ Before you buy
Cross-platform, fully native or a web app?
There is no universally right answer. The choice depends on what the app has to do with the phone itself.
| Criteria | Cross-platform (React Native) | Fully native | Progressive web app |
|---|---|---|---|
| Codebases | One | Two | One, shared with the website |
| In the app stores | Yes | Yes | Limited |
| Device features | Most, through native modules | All | Some, varies by browser |
| Right when | Most business and consumer apps | Heavy graphics, AR or deep hardware use | Content and simple tools with no store presence needed |
/ The awkward questions
The ones you were going to ask anyway.
Answered here so you do not have to spend a call on them.
Mobile App Development FAQ · reviewed
How long does it take to build a mobile app?
A first version for both iOS and Android typically takes 8 to 14 weeks, including store submission. Apple and Google review times are outside our control and are usually a few days each.
Should I build with React Native or go fully native?
For most business and consumer apps, React Native delivers a native-feeling app on both platforms from one codebase, at lower cost than two native builds. Fully native is the better choice for apps that depend on heavy graphics, augmented reality or deep hardware integration.
How much does a mobile app cost?
Cost depends on the number of screens and flows, whether a back end already exists, and features such as payments, offline use and real-time updates. We give a fixed price for a defined scope after a free discovery call.
Do you handle App Store and Google Play submission?
Yes. We prepare the listings, screenshots and privacy declarations, submit the builds, and respond to review feedback. The apps are published under your own developer accounts so you own them.
Can the app share code with my existing web app?
Yes, when the web app is built with React or TypeScript. Business logic, API clients and type definitions can be shared, which reduces both cost and the number of places a bug can hide.
Do I need an app, or is a mobile website enough?
If people use it occasionally and arrive from search, a fast mobile website is usually enough and much cheaper. An app earns its cost when people use it often, need notifications or offline access, or expect to find you in the app stores.
/ Notes from the foundry
Further reading
/ Same team, different problem
Other services
Still not sure this is the one you need?
Describe the business problem rather than the technical solution. Mapping it to the right service is our job, and the call is free whether or not we end up working together.
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