Mobile App Engineering Services
There's a gap between a mobile app that ships and a mobile app that scales. Apps built fast for an MVP often carry technical debt that makes every subsequent feature harder to add, performance problems that surface under real load, architecture decisions that require rewrites at scale, and testing gaps that make production incidents unpredictable.
Mobile app engineering is the practice of building apps with the architecture and quality standards that support the product's full lifecycle, not just the launch.
iOS and Android apps built with architecture that scales beyond the MVP
Performance-first design, tested on real device profiles, not just development hardware
Automated testing, CI/CD pipelines, and release processes built in from the start
Fixed project cost, scoped before development starts
Recent outcomes
Mobile app · Community platform
Built EventRaft, a community event management app that reached 50,000 users within 6 months of launch.
50K users in 6 monthsMobile app · Hospitality
Self-check-in app for City Break Apartments reached 580+ active users and 72+ weekly check-ins within 2 months.
3x direct bookingsMobile app · Healthcare
Pharma training app for Eris Lifesciences reached 3,500+ daily active users with 42% engagement increase.
3,500+ daily usersThe problem
Mobile app that worked for the first 5,000 users and is now slow, crashing, or hard to update?
Every new feature taking twice as long to ship because the original architecture wasn't designed for where you are now?
The short answer
RaftLabs engineers mobile apps for iOS, Android, and React Native with architecture built to scale. 60+ apps shipped for clients in the US, UK, and Australia. Cross-platform apps deliver in 10-16 weeks. Native iOS and Android with backend API take 16-28 weeks. Fixed cost, scoped before build starts.
Updated June 2026
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Mobile apps have an additional complexity layer that web apps don't: the app store release cycle. A bug in a web app can be fixed and deployed in minutes. A bug in a mobile app requires a new build, app store review, and user update adoption before the fix reaches everyone.
This means mobile app technical debt is more expensive to carry than web app technical debt. An untested code path in a web app can be fixed silently. An untested code path in a mobile app becomes a 1-star review that stays on the App Store permanently.
The most common mobile app engineering failure is treating the MVP as a temporary scaffold that will be rebuilt before it matters. It rarely gets rebuilt. The MVP becomes the foundation, and every feature added on top of a fragile foundation makes the next feature harder. Mobile apps we've engineered with proper architecture: Eris Lifesciences' pharma training app reached 3,500+ daily active users with 42% engagement increase and 30 minutes average daily usage. City Break Apartments' self-check-in app handled 580+ active users and 72+ weekly check-ins within 2 months of launch.
Capabilities
Native iOS apps built with Swift and SwiftUI, using MVVM or Clean Architecture based on team size and feature complexity. UI follows Apple's Human Interface Guidelines and passes accessibility audits before it counts as done. Swift Concurrency makes data races auditable at compile time instead of surfacing as production crashes. We handle TestFlight beta programs and App Store submission end to end. Eris Lifesciences' pharma training app, with 3,500+ daily active users and a 42% engagement increase, was built on this architecture.
Native Android apps built with Kotlin and Jetpack Compose, following Google's recommended app architecture. Room, WorkManager, and DataStore cover local persistence and background work that survives process death. Kotlin Coroutines with structured concurrency prevent the memory leaks that manual lifecycle management misses. Firebase Crashlytics and Analytics ship from day one so production quality is observable at launch. Play Store releases use staged rollouts at 10%/50%/100%, so a bad build never reaches all users before it's caught.
Cross-platform apps built with React Native for teams that need iOS and Android parity from a shared TypeScript codebase, delivering 70-80% code reuse in practice across business logic, navigation, and UI. Expo managed workflow for projects that don't need custom native modules; bare workflow when the project requires Bluetooth, NFC, local hardware APIs, or a native SDK with no React Native bridge. React Navigation for routing, Zustand or Redux Toolkit for state management, and React Query for server state. Platform-specific component variants where the iOS and Android UX conventions diverge significantly. Performance-sensitive screens profiled with Flipper and optimized with useMemo, useCallback, and FlatList virtualization before they ship, not after users complain.
Apps engineered to work reliably where connectivity fails: field crews in basements, healthcare staff in dead zones, warehouses with poor Wi-Fi. User actions queue locally in SQLite or WatermelonDB, the UI updates optimistically, and data syncs when the connection returns. Conflict resolution is explicit: last-write-wins for non-critical fields, merge prompts for high-stakes data like medical records. City Break Apartments' self-check-in app, with 580+ active users and 72+ weekly check-ins, was built offline-first for guests in poor-signal hotel lobbies.
Mobile apps where the core experience depends on live data: WebRTC voice and video calling, live delivery tracking, collaborative editing, and notification-driven products. WebSocket connections reconnect automatically with exponential backoff, so the app recovers cleanly from dropped connections. Firebase Realtime Database or Supabase Realtime handles sub-second sync without custom WebSocket infrastructure. PSi's voice AI decision platform, with 300+ concurrent users and 75% faster decision-making, runs on real-time architecture we engineered from the ground up.
Automated build, test, and distribution pipelines using Fastlane lanes for iOS (cert management via match, automated screenshot generation, TestFlight upload) and GitHub Actions or Bitrise for Android (Play Store upload via Fastlane supply). Unit tests and UI tests run on every pull request; a broken test blocks the merge before it reaches main. TestFlight external test groups for structured beta programs; Play Store internal and open testing tracks for Android. Staged rollouts configured at 10% to catch crashes before full distribution, critical for apps where a bad release can't be hotpatched the way a web app can. Release notes generated from commit messages. The entire release process runs in under 20 minutes from a merged PR to a build available in TestFlight or the Play Store testing track, giving your team a sustainable release cadence without manual overhead.
How we work
Every project follows the same four phases. Scope is locked and price is fixed before development starts.
We map the app's requirements, target users, and technical constraints. You leave week 1 with a written scope document and a fixed-price quote. No development starts without your sign-off.
Wireframes and architecture decisions before production code. Platform choice (native iOS/Android vs React Native), data model, and API contracts are locked before the build starts. Changes here cost a fraction of what they cost in week 8.
Working app on TestFlight or a staging track by the end of sprint one. Bi-weekly demos. Automated tests run on every pull request. QA runs in parallel with every sprint, not as a phase at the end.
App Store and Play Store submission handled end-to-end. Staged rollout to catch issues before full distribution. 8 weeks of post-launch support included in every project.
Why us
The engineers who assess your problem also build the solution. No bait-and-switch, no offshore handoff after the contract is signed. The team you meet in week 1 ships in week 12.
We scope the work, calculate the cost, and lock it in writing before any development starts. A scope change is a change request: priced, agreed, or dropped. It never absorbs into the project and appears on the final invoice.
Clients include Vodafone, T-Mobile, Aldi, Nike, Cisco, and Lockheed Martin. 60+ mobile apps shipped across iOS, Android, and React Native for healthcare, hospitality, logistics, and consumer platforms in the US, UK, and Australia.
GDPR, HIPAA, SOC 2 — compliance requirements are scoped in week 1, not retrofitted before launch. We have shipped HIPAA-compliant mobile apps for US healthcare clients and GDPR-compliant products for European markets.
Tell us where the friction is. We'll audit the codebase and give you a remediation plan.
Tell us what's broken. Within one business day you get a straight take on cost, timeline, and the right first step. No deck, no pressure.
Stay on topic
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Restaurant Loyalty Program Development
Custom loyalty program development for restaurants, QSR, and casual dining: visit points, spend points, mobile ordering with integrated loyalty, tiers, and re-engagement campaigns.
Wearables App Development Company
Companion apps, device sync, health analytics dashboards, and OTA firmware update systems for wearable device manufacturers and health tech companies.
OTT Platform Development Company
Custom OTT platform development for media companies launching connected TV apps: Roku, Apple TV, Fire TV, Android TV, subscription management, DRM, and analytics.
Caregiver Mobile App Development
Custom caregiver mobile apps for home care agencies, shift schedules, EVV check-in and check-out, care task documentation, client notes, incident reporting, and secure messaging.
Mobile app development focuses on delivering features that work. Mobile app engineering focuses on delivering features that work, are maintainable, perform reliably at scale, and can be extended without accumulating technical debt. The difference is in the architecture decisions, the testing strategy, the code quality practices, and the release infrastructure. For an MVP, development is often the right approach. For a product you're planning to scale and maintain for years, engineering practices are the difference between a product that stays healthy and one that becomes progressively harder to work on.
Both. We build native iOS (Swift/SwiftUI) and Android (Kotlin/Jetpack Compose) apps for use cases where platform-specific capabilities, performance, or ecosystem integration is required. We build cross-platform apps with React Native for use cases where feature parity across platforms is the priority and native performance margins aren't critical. We recommend the approach based on your specific requirements, not a default preference.
Performance is a first-class engineering concern, not a post-launch optimization task. We profile the app on real device profiles during development, not just on high-end development hardware. We optimize list rendering, network request patterns, image loading, and animation performance with target frame rates in mind. We measure startup time, time-to-interactive, and memory footprint as part of the standard development process.
We build automated testing into every sprint, unit tests for business logic, integration tests for API contracts, and UI tests for critical user flows. We set up CI/CD pipelines that run the test suite on every push and automate the build and distribution process. App store submissions are automated and follow a staged rollout process. We document the release process so your team can manage releases without depending on us.
A focused cross-platform app (React Native) covering a core user workflow typically takes 10–16 weeks. A full-featured native iOS and Android app with a backend API typically takes 16–28 weeks. Apps that require complex integrations, Bluetooth, offline-first architecture, real-time sync, or hardware sensors, take longer depending on the integration complexity.
A focused cross-platform app typically runs $25,000--$70,000. A full-featured native iOS and Android app with backend API typically runs $70,000--$200,000+. Cost depends on feature scope, platform approach, backend complexity, and integration requirements. We scope every project before pricing it.
Work with us
We scope Mobile App Engineering in 30 minutes. You walk away with a clear cost, timeline, and approach. No commitment required.