Mobile App Development in Los Angeles, California
KeyesCode is a mobile app development company serving Los Angeles, building iOS and Android apps for startups, consumer brands, creators, and venue groups across Southern California — from first App Store launch to the backend and admin tools behind it.
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Mobile App Development for businesses in Greater Los Angeles
Los Angeles launches more consumer apps per square mile than almost anywhere, and most of them are built by one of two vendors: an agency with a six-figure floor, or an offshore team the founder ends up managing. We build mobile apps end-to-end as a senior, founder-led team — the app itself, the API behind it, the admin dashboard your team uses to run it, and the App Store and Google Play submission that gets it in front of users — at a fixed fee you know before you start.
Recent work includes Liftva, an iPhone strength-training app with a progression engine, Live Activity rest timer, and an AI coach; Date Vibes, a React Native app backed by a vector recommendation engine; Weddings Guestbook, an offline-first iPad app with Apple Pencil handwriting, voice notes, and a photo booth; and On Stage, mobile check-ins and live status boards for high-end venues. We choose native Swift when the app leans on platform features and React Native when one codebase across iOS and Android is the smarter investment.
Every project starts with a short paid discovery that ends in a fixed-fee estimate. You own the App Store listing, the code, and the backend from day one — which matters when you raise and want to bring engineering in-house.
Looking for the full picture of this service, independent of location? See our Mobile Applications service.
Why Los Angeles teams hire KeyesCode
- Shipped iOS, iPad, and cross-platform apps — consumer, fitness, event, and venue products live in the App Store.
- Native Swift or React Native, chosen for your app rather than by habit.
- Backend, admin dashboard, push notifications, subscriptions, and analytics included — not just the app.
- Offline-first and real-time patterns we've already solved in production.
- Fixed-fee scoping, your Apple and Google developer accounts, and code you own from day one.
Mobile apps built to survive the App Store — and the first 10,000 users
We've launched consumer apps, venue tools, and event apps. Each one shipped with the backend, analytics, and admin tooling needed to actually operate it after launch day.
Native iOS Apps (Swift)
SwiftUI apps that use the platform fully: Live Activities, widgets, HealthKit, Apple Pencil, camera, offline storage.
Cross-platform (React Native / Expo)
One codebase for iOS and Android when speed and shared logic matter more than deep platform features.
Backend APIs & Admin Dashboards
The NestJS or Node API behind the app plus the web dashboard your team uses to manage users, content, and talent.
Subscriptions & Payments
StoreKit and RevenueCat subscriptions, in-app purchases, and Stripe where the app can sell outside the store.
Creator & Community Features
Feeds, profiles, media upload, messaging, and moderation tooling for audience-driven apps.
Offline-first & Real-time
Apps that work at a venue, on set, or on a job site with no signal, and live status boards when everyone's online.
AI Features in Mobile
On-device and cloud AI — coaching, recommendations, transcription — designed for mobile latency and cost.
App Store & Play Launch
Listing, screenshots, review guidelines, TestFlight beta, push, and a launch plan that avoids rejection surprises.
Who's building mobile apps in Los Angeles
Founders, consumer brands, creators, and venue groups — usually with a product that needs to live in someone's pocket.
Founders launching a consumer app
Pain
You've validated the idea and maybe raised a pre-seed, but every Los Angeles quote is either offshore and vague or a six-figure enterprise build.
Solution
A fixed-fee MVP with a senior team, launched to the App Store with analytics, subscriptions, and a backend you can grow on.
Creators and brands with an audience
Pain
Your audience lives on platforms you don't control, and a wrapped website isn't the app experience they'd actually pay for.
Solution
A real native or React Native app — feeds, media, membership, community — that turns an audience into a product you own.
Venues, events, and hospitality
Pain
Check-ins, performer roll calls, guest experiences, and staff coordination happen on paper and group chats, and venue wifi is unreliable.
Solution
Offline-first apps for check-in, guest interaction, and live status — we've shipped iPad and mobile apps for exactly this.
Products that need a companion app
Pain
Your web product works, but customers want it on their phone and the mobile web version is losing them.
Solution
A native or React Native app that shares your API, adds push and offline, and feels like it belongs on the device.
Built for ownership, scalability, and the long haul
Apps that make it through review and keep users after week one.
Whole product, not just the app
API, admin, analytics, and launch handled together — so there's no gap between the app and running it.
Performance you can feel
Cold-start, scroll, and sync are measured and tuned. Users notice speed before features.
Local and accountable
A team you can meet in person in Los Angeles. No offshore hand-offs, no account managers between you and the engineers.
Opinionated, but not married to a stack
We default to a tight set of tools we trust in production, and pick the right one for each layer.
iOS
01Cross-platform
02Backend
03Services
04AI
05Software we've shipped for Greater Los Angeles and beyond
Real platforms, not mockups. Problem, stack, and outcome for a few engagements relevant to this service.
Mobile App Development across Greater Los Angeles
We work on-site with clients across Los Angeles County and Orange County — from Silicon Beach to Downtown, Pasadena, and the Valley — and remote-first with the rest of California. Most collaboration runs over Slack and video regardless, with in-person kickoffs and working sessions when you want them.
- Los Angeles
- Santa Monica
- Culver City
- Beverly Hills
- West Hollywood
- Hollywood
- Downtown LA
- Pasadena
- Burbank
- Glendale
- Long Beach
- Venice
- Marina del Rey
- El Segundo
- Playa Vista
- Irvine
- Torrance
- Sherman Oaks
Questions about mobile app development in Los Angeles
What Greater Los Angeles businesses usually ask before kicking off a project with us.
Still unsure what you need?
Book a 30-minute technical discovery call. We'll help you clarify scope and the right next step.
Should we build native or React Native?
Native Swift when the app leans on platform features — Live Activities, Apple Pencil, HealthKit, camera-heavy or offline work — or when iOS is the only target for now. React Native (with Expo) when you need iOS and Android from one codebase and the app is mostly screens, data, and API calls. We'll recommend one during discovery and explain the trade-off in plain terms.
How much does it cost to build an app in Los Angeles?
Scope drives it. A focused MVP with a backend is typically a low-to-mid five-figure project; apps with real-time features, subscriptions, and multi-platform support are more. That is materially under what most Los Angeles app agencies open with. We produce a fixed-fee estimate after a short paid discovery, and you keep that document either way.
How long until we're in the App Store?
Most MVPs reach TestFlight beta in 8–12 weeks and the App Store shortly after. We handle the listing, review guidelines, and resubmissions if Apple pushes back.
Do you build the backend and admin tools too?
Yes, and we recommend it. An app without an API, an admin dashboard, and analytics is a demo. We ship all three so you can operate the product after launch.
Who owns the App Store account and the code?
You do. The app is published under your Apple Developer and Google Play accounts, the code lives in your GitHub organization, and we assign all IP on delivery — so a future in-house team or acquirer inherits everything cleanly.
Are you a Los Angeles app developer?
KeyesCode is headquartered in Tampa, Florida, and serves Los Angeles as one of our two focus markets. We meet LA clients in person across Los Angeles County for kickoffs and reviews, and build remote-first — the same way most app teams already work.
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Ready to build in Los Angeles?
Tell us what you're trying to ship. We'll meet in person in Los Angeles or over a call, scope it honestly, and give you a fixed-fee estimate you own either way.