Services
Mobile Application Development
iOS and Android apps that share code with your web platform — reducing build cost by 40% without sacrificing native performance.
What mobile development approach does Code and Trust use?
Code and Trust primarily uses React Native for mobile development — a cross-platform framework that shares up to 70% of code between iOS, Android, and web versions of your product. This reduces mobile build cost by 35–45% versus building separate native apps. For performance-critical features, we use native Swift/Kotlin modules to match native performance exactly.
Who hires Code and Trust for mobile development?
The most common mobile engagements are web app companies that need a mobile version for field workers, founders building mobile-first products from scratch, and healthcare organizations needing HIPAA-compliant apps. All share one characteristic: they need a production-quality result, not a prototype wrapped in WebView.
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Companies with an existing web app that need a mobile version for iOS and Android
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Founders building a mobile-first product from scratch
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Businesses needing field worker apps — inspection, delivery, service technicians
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Healthcare organizations needing HIPAA-compliant mobile tools for staff or patients
What does Code and Trust build for mobile clients?
A field inspection client needed an app for 80 field workers: offline data capture, photo upload with compression, and barcode scanning. The React Native app replaced paper forms and manual data entry. Report generation time dropped from 3 hours to 12 minutes per inspection — shipped in 14 weeks, fixed-price.
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React Native cross-platform apps (iOS + Android from one codebase)
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Native Swift modules for performance-critical features
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Offline-first architecture for field use cases (inspection, delivery, service)
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Push notifications and deep linking
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App Store and Play Store submission and review management
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Over-the-air updates via Expo EAS (no app store release required for JS changes)
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Biometric authentication integration (Face ID, Touch ID)
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Camera, GPS, Bluetooth, and hardware integration
Mobile technologies we use
React Native with Expo is our default mobile stack — the fastest path to a production-quality cross-platform app. Expo EAS enables over-the-air updates, eliminating app store review cycles for most ongoing changes. For hardware-intensive features we drop into native Swift or Kotlin modules without abandoning the cross-platform codebase.
Frequently asked questions
The most common questions before a mobile engagement: React Native vs. native, whether mobile can share your existing API, how long it takes, whether we handle app store submissions, and how updates work after launch without requiring a new store release every time.
Should we use React Native or native (Swift/Kotlin)?
For most business applications, React Native is the right choice — faster to build, cheaper to maintain, and good enough performance for 95% of use cases. We recommend native development only for apps with real-time graphics, complex animations, or hardware access requirements native code handles better.
Can you add mobile to our existing web app?
Yes. If your web app uses a REST or GraphQL API, the mobile app connects to the same backend. We don't rebuild your API — we build the mobile front-end that consumes it.
How long does mobile app development take?
MVP mobile apps run 10–16 weeks. Apps sharing an API with an existing web product are faster (8–12 weeks). Complex apps with offline sync, real-time features, or hardware integration run 16–24 weeks.
Do you handle App Store and Play Store submission?
Yes. We handle the full submission process: screenshots, app store listings, review management. Apple's review typically takes 1–3 days; Google's 1–7 days.
What about ongoing updates?
React Native apps can be updated over-the-air (without an app store release) for JavaScript changes via Expo EAS. Native module changes require a full app store release.
Ready to scope your mobile app?
Tell us what you're building — we'll come back with a fixed-price scope and timeline in 5 business days.