Mobile App Development · New York

Mobile App Development
in New York

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

We build iOS and Android apps for founders in New York — 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.

Get a Mobile App Development quote New York overview

Engagement shape

From

$10,000

Flat price, quoted after 30-min call

Timeline

3–6 weeks to TestFlight

First production deploy

Senior engineer, named

Day 1

Code in your GitHub

Retainer, equity, lock-in

How this works

One AI-native engineer.
The output of a team.

One senior engineer plus AI agents now ships mobile app development that used to need a four-person team. Same code quality, half the cost, three-week timelines instead of three months. Built for pre-seed to Series A founders in New York who need to ship before the next round closes.

The local read

Why mobile app development is hard in New York

NYC founders have a worse hiring problem than the funding headlines suggest. Half your top engineering candidates are weighing your seed offer against a $400K Google package. The dev shops in town are agency-of-record operations billing hourly, or staffing shops shoveling juniors into your team.

We're neither. One named senior engineer owns the build end-to-end. Flat price quoted after a 30-minute call. Eastern Time, same as your General Catalyst partner and your midtown customers. When we finish, the code is in your GitHub and the contract is over. No retainer.

Hiring one senior engineer here is a ~$310K year-one outlay and a 60–90 day search. Our mobile app development engagement starts at $10,000 with a first deploy in 3–6 weeks to TestFlight.

Did you know · New York

NYC has roughly 25,000 active tech startups, second only to the Bay Area in the US.

Time zone

--:--:--

Eastern Time, same as you. Meetings happen during your morning coffee, not midnight Slack pings.

Sectors in New York

FintechAI infrastructureMedia techB2B SaaSConsumer tech

Stack we use

React Native (Expo)TypeScriptTamagui or NativeWindSupabase / FirebaseSentry

What you actually get

Concrete deliverables.
Live in 3–6 weeks to TestFlight.

No discovery phase that bills for itself. No Figma-only delivery. Every item below is something you can open, click, and ship to a user.

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 us

Why founders in New York pick us for this

Senior engineer who has shipped both stores — store submission isn't a learning experience here

We pick React Native vs native based on the actual feature list, not a default

Performance-aware: list virtualization, image caching, JS-thread budget — measured, not hoped

Push, analytics, crash reporting, deep links, OTA — wired correctly first time

Mobile App Development we've shipped

Founders we shipped mobile app development with

Real founders, real product, real testimonials. The kind of mobile app development work we'd do for you in New York.

Content Platform · 2022

Sweet and Savory Meals

Homemade recipes blog and e-commerce platform for food lovers. Easy and delicious dishes with integrated recipe management and shopping features.

Visit the product

“When we started, there was no website, no technical foundation, just an idea and a clear vision of what I wanted to build. Valery and the Start Matter team took that vision seriously and helped me turn it into a real product from scratch. What I appreciated most was how easy and human the collaboration felt. They listened carefully, explained things in a way I could understand, and genuinely cared about building something that would work long-term, not just "finish a task." I always felt supported and involved in the process. Start Matter handled everything end to end and made the whole journey smooth and stress-free. Today, Sweet and Savory Meals is live, growing, and built on a solid foundation I trust. I’m truly grateful for their work, their patience, and their commitment, and I would happily recommend Start Matter to anyone looking for a reliable and thoughtful development partner.”

Catalina Castravet

Founder, Sweet and Savory Meals

Health Platform · 2023

Brain.fm

Music platform designed to help focus, relax, and sleep better. AI-generated music optimized for cognitive performance and mental wellness.

Visit the product

“Working with Start Matter has been a fantastic experience. When we brought Start Matter into the Brain.fm project, we were looking for more than just developers — we needed a team that could think with us, help shape the product, and execute at a high level. Start Matter did exactly that and more. From early iterations to complex feature development, the team showed deep technical expertise, strong problem-solving skills, and a clear focus on delivering value. Communication was always open and honest, and they were great about adapting to changes and challenges without missing a beat. What really stood out was their ability to integrate seamlessly with our internal team and match our pace. They consistently delivered high-quality work and made sure we felt supported at every step. I'm very grateful for their professionalism, creativity, and commitment to excellence. I would highly recommend Start Matter to anyone who wants a reliable, skilled, and thoughtful development partner.”

Daniel Clark

Co-founder, Brain.fm

Deeper reads

Common questions about mobile app development
in New York

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

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