Ortem Technologies

    Mobile App Development

    Cross-Platform App Development Company

    One Codebase. iOS & Android. Flutter & React Native.

    Ship a high-quality app to both the App Store and Google Play from a single codebase. US-managed team, 8–12 week MVPs, 40–60% lower cost than building native twice.

    All Mobile Services
    Clients Worldwide
    300+
    Projects Delivered
    1,000+
    Rated on Clutch & GoodFirms
    5/5
    Years Experience
    13+

    Cross-platform used to mean a compromise — a web view dressed up as an app, with performance to match. That's no longer true. Modern frameworks (Flutter, React Native's New Architecture) compile to native code and get real hardware access, which is why cross-platform now delivers 80–95% of native performance for the large majority of product categories, at 40–60% of the cost of building and maintaining two separate native codebases.

    What you're actually trading away

    The honest trade-off isn't performance for most apps — it's day-one access to brand-new platform APIs, and the ceiling on truly platform-specific features (deep ARKit or Core ML integration, Wear OS, Android Auto). If your product's differentiator lives in that territory, native is worth the extra cost. For everything else — consumer apps, marketplaces, FinTech, enterprise tools — cross-platform is the pragmatic default, not a compromise.

    How we choose between Flutter and React Native

    We don't default to one framework and fit every project into it. If your team already ships a React web app, React Native's shared component patterns and npm ecosystem usually win — the crossover in skills and sometimes code is real. If visual fidelity and animation smoothness matter more than team overlap, or you're starting fresh with no existing JavaScript codebase, Flutter's own rendering engine gives more consistent results with less platform-specific tuning. We make this call during discovery, based on your product and team — not a fixed house preference.

    Ready to ship on iOS and Android? Get a free proposal → Tell us about your project; we'll scope it, pick the right framework, and reply within 48 hours.

    Why cross-platform

    Why Cross-Platform?

    Flutter & React Native

    The two leading cross-platform frameworks. Flutter for pixel-perfect UI and top-tier performance, React Native for JavaScript ecosystem integration. We're expert in both.

    One Codebase, Two Stores

    Ship to the App Store and Google Play from a single codebase. 80–95% shared code means faster features, fewer bugs, and half the maintenance overhead.

    Native Performance

    Modern cross-platform frameworks compile to native code — not a web view. Your users get smooth 60fps animations and native hardware access without knowing it's cross-platform.

    40–60% Cost Savings

    One team, one sprint cycle, one QA pass — across both platforms. Cross-platform cuts development cost by 40–60% versus separate native builds, with no quality compromise for most apps.

    Comparison

    Flutter vs React Native

    Flutter

    • Google-backed, Dart language
    • Pixel-perfect UI on iOS & Android
    • Best for animation-heavy apps
    • Fastest rendering via Skia/Impeller
    • Growing ecosystem, Material 3
    • Also compiles to web & desktop

    React Native

    • Meta-backed, JavaScript/TypeScript
    • Shares code with React web apps
    • Massive npm ecosystem access
    • Best if team knows JavaScript
    • New Architecture (JSI) for speed
    • Expo for faster iteration

    Not sure which to pick? We'll help you decide — at no charge — based on your product requirements and timeline.

    What we build

    What We Build

    • Startup MVPs (validate fast, iterate faster)
    • Consumer marketplace & social apps
    • FinTech & payments apps
    • On-demand delivery & logistics
    • Healthcare & patient engagement apps
    • Enterprise field service tools
    • EdTech & e-learning platforms
    • Internal business tools & portals

    How we work

    Our Cross-Platform Delivery Process

    1. 01

      Framework Selection & Scoping

      We map your feature set, team background, and platform-specific needs to recommend Flutter or React Native, then produce a fixed-scope project charter.

    2. 02

      Shared Architecture Build

      A shared component library and state management layer get built first, so screens compose from tested primitives rather than one-off implementations per platform.

    3. 03

      Native Bridge Integration

      Camera, GPS, biometrics, push notifications, and payments are wired in through official or custom native modules — tested on real iOS and Android hardware, not just simulators.

    4. 04

      QA & Dual Store Submission

      Automated tests run in CI on every PR. We handle both Apple App Store and Google Play submission, then hand over the repo, CI access, and documentation.

    Investment

    Cross-Platform App Cost & Timeline

    ScopeTypical CostTimeline
    MVP (core flows, iOS + Android)$22,000 – $45,0008–12 weeks
    Growth app (payments, real-time, custom integrations)$45,000 – $85,00014–18 weeks
    Enterprise (offline-first, SSO, complex integrations)$85,000+18+ weeks

    Ranges reflect fixed-scope quotes after a discovery call — not hourly billing, and 40–60% below the cost of building native iOS and Android separately.

    FAQ

    Cross-Platform Development FAQ

    Cross-platform app development means building a single codebase that runs natively on both iOS and Android. Frameworks like Flutter and React Native compile to native code, so the app looks and performs like a native app — without the cost of maintaining two separate codebases. For most mobile products, cross-platform delivers 80–95% of native performance at 40–60% of the cost.

    Flutter (Google/Dart) gives you pixel-perfect UI consistency across platforms, faster rendering, and better performance for animation-heavy apps. React Native (Meta/JavaScript) integrates more easily with existing web codebases, has a larger ecosystem, and is the better choice if your team already knows JavaScript. We build both and help you choose based on your product requirements, existing tech stack, and team.

    A cross-platform MVP covering core features typically takes 8–12 weeks — roughly 30–40% faster than building two native apps separately. A more complex app with custom integrations, real-time data, and payment flows takes 14–18 weeks. We work in two-week sprints so you see a working build on both iOS and Android throughout development.

    Yes, significantly. Building native iOS and Android separately means maintaining two codebases, two sets of engineers, and two release cycles. Cross-platform development shares 80–95% of the codebase across both platforms, reducing development cost by 40–60% and ongoing maintenance cost by a similar margin. For startups validating an idea or companies with budget constraints, cross-platform is almost always the right starting point.

    A cross-platform MVP typically runs $22,000–$45,000 over 8–12 weeks. A growth-stage app with payments, real-time features, and custom integrations runs $45,000–$85,000 over 14–18 weeks. Enterprise builds with offline-first sync, SSO, or complex integrations start at $85,000. Every quote is fixed-scope after a free discovery call, itemised by feature.

    Yes, though it's rarely necessary. Most products never outgrow cross-platform performance. If a specific feature genuinely needs native-only capability (deep ARKit integration, Wear OS), we typically wrap that one feature in a native module rather than rewriting the whole app — a full native rewrite is a last resort we'd only recommend after a concrete performance ceiling shows up in production data.

    When native wins

    When Does Native Make More Sense?

    Cross-platform covers 90% of apps. But if you need deep Apple ecosystem integration (ARKit, Core ML, HealthKit at the metal), or advanced Android hardware access (Camera2, Wear OS, Android Auto), native is worth the investment. We build native iOS and Android too — and help you choose the right approach.

    Native iOS DevelopmentNative Android Development

    Ready to Ship on iOS & Android?

    Tell us about your project. We'll scope it, pick the right framework, and give you a transparent proposal — within 48 hours.

    Also see: Flutter Development · React Native Development · Mobile App Development