Mobile App Development for Companies Past the MVP Stage

iOS, Android, and React Native apps with the backend, App Store, and Play Console handled end to end. Founder-led from scope through launch — no offshore handoffs, no agency markup, no half-finished cross-platform demos.

Why most mobile builds stall

Three failure modes show up over and over. The first is the cross-platform demo that looked fine in Figma and falls apart the moment a real device runs out of memory or loses connectivity. The second is the native build that took eighteen months because the agency had a junior pool, a project manager, and three layers of bureaucracy between the founder and the engineer writing code. The third is the app that launched, passed App Store review, and immediately broke because nobody planned for production analytics, crash reporting, or a backend that could survive a real install base.

Custom mobile app development is not just writing a Swift or Kotlin file. It is the API, the auth flow, the push notification routing, the in-app purchase reconciliation, the offline-first sync, the deep-link routing, and the operational layer that catches problems before your users do. We ship apps that survive that whole list.

What we build

Native iOS apps in Swift and SwiftUI for App Store distribution
Native Android apps in Kotlin and Jetpack Compose for Play Store distribution
Cross-platform React Native apps when shared code wins on velocity and maintenance cost
Backend API on Node, PostgreSQL, and Prisma — same stack we use for every custom build
Authentication flows including Sign in with Apple, Google Sign-In, magic link, and biometric unlock
Push notifications wired through APNs and Firebase Cloud Messaging with delivery audit logs
Offline-first data sync with conflict resolution for field-worker, retail, and contractor apps
In-app purchase and subscription wiring through StoreKit 2 and Google Play Billing, reconciled server-side
Deep linking, universal links, and App Links so marketing channels land users in the right screen
Crash reporting, performance monitoring, and analytics instrumented from day one

Our methodology

Two-week discovery — user flows, screen map, platform decision (native vs React Native), backend schema, and a phased build plan. From there we run a six- to sixteen-week build with weekly TestFlight and Play Internal Testing drops so you are clicking through a real app from week three onward, not waiting for a demo at the end.

Discovery is paid separately at $2,500. You walk away with wireframes, a data model, a phased estimate, and a platform recommendation. Useful even if you take it to another developer — but most clients sign for the build because the spec is already done.

Process & timeline

Week 1-2: Discovery sprint — user flows, platform decision, data model, phased estimate
Week 3-4: Design pass and backend foundations — auth, data model, initial API endpoints
Week 5-12: Build sprints — TestFlight and Play Internal Testing builds every Friday
Week 13-15: Hardening — accessibility, edge cases, App Store screenshots, privacy declarations
Week 16-18: Submission, review iteration, production launch, 30-day post-launch support

Tech & tools

Swift + SwiftUI

Kotlin + Jetpack Compose

React Native + Expo

Node + TypeScript API

PostgreSQL + Prisma

APNs + Firebase FCM

StoreKit 2 + Play Billing

Sentry + PostHog

Fastlane + EAS Build

Backend hosted on Vercel, Fly.io, AWS, or your own infrastructure — your call. The same patterns that power our Next.js web applications and custom CRMs sit underneath the mobile layer.

Reference builds

Mobile patterns we have shipped in production show up across our case studies. A motorcycle shop ops platform uses a tablet-grade interface designed for service-bay workflows. A contractor estimating engine ships proposals from the field with offline support. Northcrest Fence runs a mobile-first lead intake and routing flow.

We dogfood our own architecture before we ship it. The patterns we use for client mobile work are the same ones we run internally. No experiments paid for by clients.

Served from Macon, GA, with mobile clients across Atlanta, Austin, Miami, and beyond.

Pricing

Fixed-fee per phase. Typical ranges by scope:

Single-platform v1 (React Native, simple backend): $25k – $55k
Dual-platform v1 (iOS + Android, full backend, payments): $45k – $90k
Native iOS or Android with deep platform features (HealthKit, ARKit, CarPlay): $60k – $120k
Discovery sprint: $2,500 flat, billed separately so you can decide before committing

Optional retainer for continued feature work after launch. 30-day post-launch support included on every build.

What you get

Full source code repository — mobile clients and backend, in your GitHub org
App Store Connect and Google Play Console accounts in your name
Signing certificates, provisioning profiles, and the keys to the kingdom
30-day post-launch support — bug fixes, App Store re-review handling, hot patches
Crash reporting, analytics, and performance monitoring wired and operational
Admin and user documentation, plus a runbook for backend operations
Optional retainer for continued feature work and platform upgrades

FAQs

Should we build native iOS and Android or use React Native?

Default to React Native if your app is content-heavy, form-driven, or backend-bound. Go native (Swift or Kotlin) when you need deep hardware integration, complex animations, or platform-specific frameworks like ARKit, HealthKit, or CarPlay. We scope this in week one based on your actual feature list, not a sales pitch.

How long does a custom mobile app take to ship?

10 to 20 weeks for a production v1 across both stores. Discovery and design take 2 to 3 weeks, the build runs 8 to 16 weeks, and submission plus review handles the last 1 to 2 weeks. Apps with complex backends, payments, or audit requirements land at the upper end.

Do you handle App Store and Google Play submission?

Yes. We prepare screenshots, copy, privacy declarations, IAP product setup, and TestFlight or internal-testing tracks. We manage the first submission and the first one or two rejections — most are minor metadata or privacy-disclosure issues we know how to handle.

What about the backend, push notifications, and analytics?

Standard part of the scope. We build the API on Node and PostgreSQL, wire push through APNs and FCM, and instrument analytics with PostHog or a tool you already use. The app is one piece of a system, not a standalone deliverable.

Do we own the code?

Completely. You get the GitHub repository, the backend, the signing certificates, the App Store and Play Console accounts in your name, and the documentation. There is no platform fee and no exit ransom.

Engineering reading

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Related services

API Development

REST and GraphQL APIs to back your mobile clients.

Next.js Web Apps

Companion web dashboards and admin portals.

SaaS Platform Development

Full multi-tenant SaaS with mobile as a first-class client.

Most mobile builds connect to a custom backend — see our custom CRM development guide for how we approach data ownership, or contact us directly to scope a mobile project.

Mobile App Development — Where We Serve

Georgia-based engineering team, working with clients across 14 US metros. Mobile discovery and build run remotely; in-person scoping sessions easy to schedule in Atlanta and the Southeast.

Ready to ship a mobile app that actually launches.

Call William Beltz directly at (770) 652-1282 or book a 20-minute scope call. We will tell you in the first conversation whether your idea is a React Native build, a native build, or a problem mobile cannot actually solve.