Mobile App Development · London

Mobile App Development
in London

iOS and Android from one engineer, in your stores in weeks.

We build iOS and Android apps for founders in London — usually React Native, native when the use case requires it. One engineer owns the app, store accounts, and the first build in TestFlight inside three weeks.

from $10,0003–6 weeks to TestFlightFlat-price, your code

Get a Mobile App Development quote Back to London overview

What you get

Concretely, by the time we hand over

Single codebase for iOS + Android — Expo prebuild for native modules when needed
Authenticated user flow with push notifications and offline-first storage
TestFlight build before week three; App Store + Play Store submission included
OTA updates via Expo Updates so you ship fixes without a store review
App store listings (screenshots, copy, privacy nutrition labels) handled

Why this works for London

The local math

London is the #3 startup ecosystem globally and the gateway to European pre-seed. Hiring senior engineers means £100K+ packages and 90-day cycles in a market still recovering from the post-Brexit shuffle. We work async with London founders, bill in USD, ship in two weeks.

Year-one outlay for a single senior hire in London: ~$200K. Our mobile app development engagement starts at $10,000.

Stack

What we use for mobile app development

React Native (Expo)TypeScriptTamagui or NativeWindSupabase / FirebaseSentry

Why us

Why founders in London pick us for this

01
Senior engineer who has shipped both stores — store submission isn't a learning experience here
02
We pick React Native vs native based on the actual feature list, not a default
03
Performance-aware: list virtualization, image caching, JS-thread budget — measured, not hoped
04
Push, analytics, crash reporting, deep links, OTA — wired correctly first time

FAQ

Common questions about mobile app development in London

How fast can you start?

Most builds begin within seven days of the first call. We don't sell discovery — we go from problem statement to first deploy on the same day-one timeline.

Is the price really flat?

Yes. After a 30-minute call we send a single number and a scope you can accept or reject. No hourly billing, no change-order games. If we underestimate, we eat it.

React Native or native (Swift/Kotlin)?

React Native by default — 90% of features are identical and you ship to both stores at once. Native if you have hard requirements (live activities, complex camera, low-level audio, watch app).

Do you handle App Store submission?

Yes — Apple Developer + Google Play account setup (or working in yours), screenshots, privacy declarations, review responses if rejected. Most apps clear review in 24–72 hours.

Who owns the code?

You do, from commit one. The repository is created in your GitHub org. Infrastructure is provisioned in your cloud account. We don't host your stack on ours and we don't lock you in.

More questions → /faq/tech · /faq/timeline · /faq/cost

Also in London

Other things we build for London founders

MVP Development

Ship a working v1 in two weeks, not two quarters.

from $5,000 · 10–14 days

SaaS Development

Multi-tenant, billed, deployable. Not a prototype.

from $12,000 · 4–8 weeks

React & Next.js Engineering

Production frontends shipped on a flat price.

from $6,000 · 2–4 weeks

Fractional CTO

Senior technical leadership without the $300K base.

from $4,000 · Monthly engagement

AI Product Development

LLM features that actually ship to users.

from $8,000 · 2–5 weeks

Mobile App Development elsewhere

We ship mobile app development for founders in

Ready to ship mobile app development in London?

30-minute call → flat-price quote in 24 hours → first deploy inside two weeks.

Start the call See London overview