Mobile App Development — MAGNITUDE STUDIO, LOS ANGELES

Mobile App Development in Los Angeles

One team for iOS, Android, and everything between. We handle discovery, design, code, device testing, and store submission — then stay on after launch. Native when the product demands it, cross-platform when one codebase serves you better.

Book a consultation ↗Four apps designed and coded in-house, all live.

One team, both platforms, the whole build

Mobile projects usually break at the handoffs: a design agency hands files to a dev shop, the dev shop hands builds to a QA vendor, and nobody owns the result. We removed the handoffs. On a mobile build, the people who draw your screens also write the Swift and Kotlin behind them, test the builds on real hardware, and walk the app through store review. EVNTBL, FREQNCY, DRIVIFY, and PRELLEX were all built without handoffs — every screen and every endpoint from one studio.

No handoffs

Design and engineering sit at the same table, so decisions take a conversation, not a ticket. What ships matches what was designed.

The right stack, argued honestly

Native Swift and Kotlin when performance and hardware access matter. React Native or Flutter when one codebase gets both platforms live on one budget. We recommend what fits the product, not what we feel like building.

Built past launch day

Version one is the start, not the finish. We architect for the features on your roadmap and stay available for updates, fixes, and new releases.

How a mobile build runs

Discovery

We map who uses the app, what it must do at launch, and what waits for version two. The platform call — iOS, Android, or both — gets made here, with reasons attached.

Design

Flows first, then wireframes, then full UI in Figma. You see and approve every screen before a line of production code is written.

Build

The app, the backend, and the APIs, built in parallel by one team. You get working builds on your own phone throughout — not a demo at the end.

Device QA

We test on real hardware across screen sizes and OS versions: slow networks, interrupted sessions, low batteries. Bugs die here, not in your reviews.

Launch & support

We prepare listings, handle store submission, and manage review feedback. After launch we watch crashes and analytics and keep shipping updates.

What’s included

Discovery & Requirements

A short, structured phase that turns your idea into a written scope: features, flows, platform choice, and the architecture to support them.

iOS & Android Development

Native builds in Swift for iPhone and Kotlin for Android. See the dedicated iOS development and Android development pages for platform-specific detail.

Cross-Platform Builds

React Native and Flutter apps that ship to both stores from one codebase — often the right call for MVPs and products where speed to both platforms beats native polish.

UI/UX Design

Every screen designed in-house, following each platform’s conventions so the app feels native to the device it runs on.

QA Across Devices

Testing on real phones and tablets, not just simulators — different screen sizes, OS versions, and network conditions, before any user sees a bug.

Store Submission & Post-Launch

Listings, screenshots, and review management handled for you. After launch: crash monitoring, analytics, and a team that still picks up the phone.

Tools we build with

No default stack. We pick tools that fit the product, the budget, and the roadmap — then commit to them.

Platforms

Swift & SwiftUI
Kotlin & Jetpack Compose
React Native
Flutter

Backend & data

Node.js
PostgreSQL
Firebase
REST & GraphQL APIs

Design & delivery

Figma
TestFlight
Play Console
Analytics

Four shipped, four live

We’ve shipped four products end to end, all live today: EVNTBL, an events marketplace connecting hosts and guests; DRIVIFY, mobile auto services booked to your door — the app, the provider marketplace, and the backend; FREQNCY, an AI-powered artist-management platform whose brand we also created; and PRELLEX, an AI co-pilot for solo and small-firm attorneys. Every screen and every endpoint was designed and coded in this studio.

Bring the idea. Leave with the build plan.

Book a consultation ↗

Mobile app development FAQs

Our app was built by another team and isn’t working. Can you take it over?

Yes — it’s a common situation. We start with a code audit: what’s salvageable, what isn’t, and what each path costs. Sometimes the fix is surgical; sometimes a rebuild is cheaper than the rescue. You get an honest read before committing to anything.

How long does mobile app development take?

It depends on scope. A tight MVP moves fastest; a two-platform product with a custom backend takes longer. We won’t quote a number before we understand the product — but we will lock a written timeline at the consultation and hold to it.

What do you need from us to get started?

A clear idea of the problem and someone who can make decisions. That’s it. You don’t need specs, wireframes, or a technical background — discovery exists to turn what’s in your head into a written scope we both sign off on.

Should we launch on iOS first, Android first, or both?

It depends on where your users are. iOS first often suits US consumer products; Android matters when your audience is global or hardware-diverse. If you need both from day one, a cross-platform build covers both stores from one codebase. We make the call together at the consultation, with reasons.

What does a mobile app cost?

We quote a single fixed price for the whole project — you’re never on an hourly clock and never surprised by an invoice. The number depends on what we’re building, so we scope first and quote once. You know the full cost before any work begins, and you own the code, accounts, and infrastructure when it ends.

Let’s build your app

Magnitude is how scientists measure what gets felt. So do we.

Bring the idea; we’ll bring the questions. One consultation gets you a straight read on platform, scope, and a written plan to launch.

Book a consultation ↗