Mobile App Development in Seattle & beyond
We design, build, and ship mobile apps end to end: product thinking, native-feeling UI, App Store and Play Store submission, and the backend that powers it all.
A mobile app is two projects wearing one trench coat: the app your users touch, and the backend, auth, push-notification, and release infrastructure behind it. Teams that treat the second half as an afterthought ship a v1 that can't update itself out of trouble. We build both halves together, so review-day surprises and 2-star launch weeks don't happen.
Our default is React Native with Expo — one codebase, both stores, native performance where users can feel it — with Swift or Kotlin modules when a feature genuinely needs the metal. We've shipped consumer apps through the App Store ourselves (our own PersonLog is live there today), so the advice you get comes from people who've been through review, rejection, and resubmission with our own products.
Should you build cross-platform or native?
Cross-platform (React Native or Flutter) is the right default for most business and consumer apps in 2026: one codebase covers iOS and Android, ships features simultaneously, and costs roughly 60% of maintaining two native teams. Native Swift or Kotlin wins when your app leans hard on platform-specific hardware — advanced camera pipelines, real-time audio, watchOS, widgets-first experiences.
Our honest rule: start React Native, drop to native modules for the two or three screens that need it. Very few apps justify full dual-native builds, and the ones that do usually know it already.
How much does it cost to build an app?
A focused v1 — one core job, clean UI, App Store and Play Store live — typically lands between $15k and $60k with AI-accelerated delivery. Add a custom backend, payments, or real-time features and you're in the upper half of that range. A clickable prototype for investor or user validation can be done for under $10k.
Ongoing costs matter too: budget for OS updates twice a year, and store fees (Apple $99/yr, Google $25 one-time). We quote fixed prices after a discovery sprint, so the number you sign is the number you pay.
What's included
- iOS & Android from one React Native codebase
- Native Swift / Kotlin where it matters
- App Store & Play Store submission handled
- Backend, auth, push, and analytics included
Ideal for
- Founders taking a validated idea to the App Store
- Businesses whose customers keep asking 'is there an app?'
- Products that need a companion app for an existing web platform
- Teams with a prototype that needs production hardening and launch
How we work
- 1
Discovery sprint
1–2 weeks: define the one job the app must do brilliantly, map the screens, spike the risky feature, and produce a fixed quote.
- 2
Design & prototype
Native-feeling flows designed platform-first — not a website squeezed into a phone. Clickable prototype before code.
- 3
Build & TestFlight
Two-week sprints with TestFlight / internal-track builds your team installs from week two. Real devices, real feedback.
- 4
Store launch & stabilize
We handle review submission, rejection responses, and launch monitoring — then a 30-day window for the issues only real users find.
What you'll get
- Shipped apps in the App Store and Play Store, under your developer accounts
- One React Native codebase (or native, where scoped) with CI builds via EAS
- Backend API, authentication, and push-notification infrastructure
- Analytics and crash reporting wired from day one
- Store listing assets, release runbook, and a 30-day stabilization window
FAQ
- iOS first, Android first, or both?
- Both, from one codebase — that's the point of React Native. If budget forces a choice, we look at where your actual audience is; in the US, iOS-first is usually right for consumer, both-at-once for B2B.
- Have you actually shipped to the App Store?
- Yes — including our own products. PersonLog, a relationship-management app we built and operate, is live on the App Store today. We've been through review, rejection, and resubmission with our own name on the line.
- Can you take over an existing app?
- Yes. We audit the codebase, stabilize the release pipeline, and then extend. If the foundation is unsalvageable we'll tell you before taking your money.
- Who owns the developer accounts?
- You do. Apps ship under your Apple and Google accounts, code lives in your repo, and every credential is yours from day one.
Have a project in mind?Let's build something real.
We respond within one business day with a clear next step — never a generic sales pitch.