Mobile App Development
A mobile app development company shipping iOS & Android.
Cross-platform apps from one codebase — native-feeling, store-ready, and sharing a backend with your web product. Built in California for US clients and teams worldwide.
iOS and Android, from one codebase
Building two separate native apps is slow and expensive. We build cross-platform with React Native and Flutter, so you ship iOS and Android together — without giving up the native feel users expect.
Our apps share the same NestJS API and MongoDB data as your web product, so accounts and features stay in sync. We handle the parts that make an app feel real — navigation, gestures, offline, push, deep linking — plus store submission, analytics, and crash reporting. We've done it for our own products and run them in production.
- Native iOS build (App Store ready)
- Native Android build (Play Store ready)
- Shared API with your web product
- Push notifications & deep linking
- Offline support & secure storage
- Analytics + crash reporting
- App Store & Play Store submission
- Over-the-air update pipeline
What we can do for you
Everything your app needs — design to App Store
No jargon. Here's exactly what we'll handle so you get a finished app on both stores without managing the technical side.
What we build
Apps we ship for every kind of business
Whatever the category, it's one codebase, both stores, and a backend that scales.
Consumer apps
Polished, fast iOS + Android apps with onboarding, profiles, and push.
Marketplace & on-demand
Two-sided apps, bookings, real-time status, maps, and in-app payments.
SaaS companion apps
A native app for your existing web product, sharing one API and accounts.
Social & community
Feeds, chat, notifications, and content — the patterns behind apps like SocialPatra.
Fintech & subscriptions
Secure auth, biometric login, Stripe/PayPal billing, and receipts.
AI-powered apps
Chat, assistants, and AI features powered by Claude/OpenAI, on-device or via your API.
React Native vs Flutter
We build with both — and pick the right one
The framework should fit your product, not the other way around.
React Native
Great when you want to share code and skills with a React/Next.js web app, or move fast with a huge ecosystem. Our pick for most SaaS companion apps.
Flutter
Great for highly custom, animation-heavy UIs and pixel-identical screens across platforms. We ship Flutter in production (SocialPatra, ContentBuffer, CodeBrainery).
Want the full breakdown? Read React Native vs Flutter in 2026 →
How we build
Cross-platform, but truly native in feel
One codebase, both stores
Cross-platform from day one with React Native or Flutter, so you ship iOS and Android together — not two apps to build and maintain.
Native feel, not a wrapped site
Real navigation, gestures, offline, and platform conventions. Apps that feel native because they behave native.
Shared backend with your web app
The app talks to the same NestJS API and MongoDB data as your web product, so accounts and features stay in sync.
Through review, into the stores
We handle submission, push, deep links, analytics, and crash reporting so you launch and learn fast.
How a project runs
Simple, transparent, no agency theatre
You always know what's happening and what it costs — and you see the app come together, not a black box.
- 1
Free scoping call
Tell us what the app must do. We agree the core screens and features together.
- 2
Plan, timeline & fixed price
A one-page plan and a fixed quote within days — no hourly surprises.
- 3
Design & build for both
A clickable preview first, then iOS and Android built together and tested on real devices.
- 4
Launch & maintain
We submit to both stores, help you go live, and keep it updated on a care plan.
Mobile stack
The tools behind our shipped apps
Frameworks
Backend
Native features
Delivery
Proof
Apps we ship to both stores
Each ships native iOS and Android alongside its web product — built and run by us.
Web · iOS · Android · MCP
An AI-powered social media automation platform: compose once and publish platform-native variations across 23 networks, with scheduling, analytics, and a viral predictor.
Web · iOS · Android
A technical blogging and learning platform — publish articles with rich code highlighting, take courses with certificates, solve coding problems, and compete in live team contests.
From the blog
Planning a mobile app?
What it costs
Fixed prices, no enterprise minimums
Timeline
A focused first version (MVP) usually ships in a few weeks, not months.
Pricing
A fixed quote after a free scoping call. One codebase for both platforms keeps it affordable — and there are no enterprise minimums.
After launch
Care plans from $99/mo cover updates, OS changes, and app-store re-submissions.
Get a fixed price for your app — usually within one business day.
FAQ
Mobile app development, answered
What does a mobile app development company build?
Kodetra builds cross-platform iOS and Android apps from one codebase — with native-feeling performance, offline support, push notifications, deep linking, and full app-store submission, sharing an API and accounts with your web product.
Native iOS/Android or cross-platform?
Cross-platform with React Native and Flutter — both ship iOS and Android from one codebase while feeling native, which keeps cost and timelines down versus maintaining two native apps.
Have you shipped real apps to the App Store and Play Store?
Yes. SocialPatra, ContentBuffer, and CodeBrainery each ship native iOS and Android apps alongside their web products — built, submitted, and operated by us on a shared NestJS backend.
How long and how much?
Most apps go live in weeks, not months. After a short scoping call we send a one-page plan with a timeline and a fixed price. See our blog posts on mobile app cost and timeline for ranges.
How do I start?
Email info@kodetra.com or use the contact form. We reply within one business day. US clients can meet in person; we work with teams worldwide.
Want your app on iOS and Android?
Tell us your idea — we'll map it to a cross-platform plan with a timeline and a fixed price.