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From native Android and iOS apps to powerful cross-platform solutions — SourceMash delivers end-to-end mobile application development that combines exceptional UX, enterprise-grade performance, and seamless backend integration for every screen and every user.
Our Mobile Practices
Whether you need a native app that pushes platform capabilities to the limit, or a cross-platform solution that ships faster without compromise — SourceMash has the specialist expertise for every mobile brief.
Kotlin & Java native apps
Swift & SwiftUI native apps
Flutter, React Native & more
Practice 01
Android commands over 72% of the global smartphone market — and SourceMash helps you build native Android applications that take full advantage of every capability the platform offers. From Kotlin-first architecture and Material Design 3 UIs to Jetpack Compose, background services, and deep Google ecosystem integrations, our Android team delivers apps that are fast, reliable, and built to Google's highest quality standards.
End-to-end custom Android application development in Kotlin — leveraging Jetpack Compose for modern declarative UIs, MVVM clean architecture for maintainability, and the full Android Jetpack library suite for robust, testable, and scalable application codebases built to last.
Mission-critical Android applications for enterprise environments — including Android Enterprise managed device deployments, MDM integration, offline-first field service apps, barcode and RFID scanning solutions, and ruggedised device support for warehouse, logistics, and industrial use cases.
High-performance Android apps for e-commerce and financial services — featuring secure payment gateway integrations (Razorpay, Stripe, UPI), biometric authentication, real-time data synchronisation, PCI-DSS compliant checkout flows, and app-level analytics for conversion optimisation.
Android applications that interface directly with hardware and IoT devices — covering Bluetooth LE, NFC, USB peripheral communication, camera and sensor pipelines, and companion app development for wearables, medical devices, smart home systems, and industrial IoT deployments.
Intelligent Android applications enhanced with on-device machine learning — including real-time object detection, natural language processing, image classification, and personalisation engines using Google ML Kit, TensorFlow Lite, and MediaPipe for fast, private, offline AI inference directly on the device.
Migration of legacy Java Android apps to modern Kotlin and Jetpack Compose architecture, performance profiling and crash rate reduction, Play Store listing optimisation, OS compatibility upgrades, and ongoing managed support — keeping your Android app competitive, secure, and up to date.
Apps optimised for phones, tablets, foldables, and Chrome OS with adaptive layout support.
Firebase Cloud Messaging, rich notifications, and in-app messaging to drive daily active usage.
Certificate pinning, keystore encryption, root detection, Play Integrity API, and OWASP mobile guidelines.
Firebase Analytics, Google Analytics 4, Crashlytics, and custom event tracking for data-driven iteration.
Practice 02
iOS users represent the highest-value mobile segment globally — and they expect exceptional quality on every screen interaction. SourceMash's iOS team builds native iPhone and iPad applications using Swift and SwiftUI that meet Apple's exacting design standards, pass App Store review on first submission, and deliver the fluid, premium experience your users demand. From consumer apps to enterprise solutions, we build iOS apps that define the standard in their category.
Full-cycle native iOS application development in Swift and SwiftUI — following Apple's Human Interface Guidelines, implementing clean MVVM and VIPER architectures, and using the latest iOS SDK features to create apps that feel distinctly, unmistakably Apple-native in every gesture, animation, and interaction.
Universal application development targeting iPhone, iPad, and Mac Catalyst — a single, adaptive codebase that delivers an optimised, context-aware experience on every Apple device, including Apple Silicon Macs, taking advantage of multitasking, split view, and hardware keyboard and trackpad support.
Premium iOS apps for financial services and commerce — featuring Apple Pay and StoreKit 2 in-app purchase integrations, Face ID and Touch ID biometric authentication, PCI-compliant payment flows, real-time portfolio dashboards, and Wallet passes for a seamless, secure financial user experience on iPhone.
Immersive iOS applications leveraging Apple's cutting-edge frameworks — ARKit and RealityKit for augmented reality experiences, Vision for real-time image analysis and OCR, Core ML for on-device inference, and Create ML for training custom models — delivering intelligent, interactive experiences that showcase iPhone and iPad hardware at its fullest.
Enterprise iOS application development and deployment — including Apple Business Manager integration, MDM-managed app distribution, single sign-on with corporate identity providers, secure document management, and offline-capable field apps for sales, service, and operations teams working in the field.
App Store submission, review preparation, and ASO strategy — covering metadata optimisation, screenshot design, preview video production, keyword research, rating strategy, and ongoing app performance monitoring. We also provide SLA-backed post-launch support, OS update compatibility testing, and continuous release management.
Native watchOS companion apps with complications, always-on displays, and health sensor integrations.
tvOS applications for media streaming, enterprise kiosk, and living-room digital signage use cases.
Keychain integration, App Transport Security, privacy manifest compliance, and App Tracking Transparency.
Seamless multi-device data sync using CloudKit and iCloud, keeping users connected across all Apple devices.
Practice 03
When you need to reach both Android and iOS users simultaneously — without doubling your engineering investment — cross-platform development delivers. SourceMash's cross-platform practice specialises in Flutter and React Native, the two most proven frameworks for building genuinely native-quality mobile experiences from a single shared codebase. We help you choose the right framework, architect it correctly from the start, and deliver apps that users can't distinguish from fully native builds.
Build beautiful, high-performance apps for iOS, Android, Web, and Desktop from a single Dart codebase using Google's Flutter framework. Flutter's own rendering engine delivers pixel-perfect, 60fps UIs on every platform — with no JavaScript bridge overhead — making it the ideal choice for apps where visual quality and animation richness are non-negotiable.
Leverage your web team's JavaScript and React expertise to build production-ready native mobile apps with React Native — using the New Architecture (JSI + Fabric) for bridgeless, near-native performance, with true native component rendering on both Android and iOS for a genuinely platform-appropriate look and feel.
Enterprise-grade cross-platform mobile and desktop apps using Microsoft's .NET MAUI (Multi-platform App UI) — the evolution of Xamarin — enabling C# and .NET developers to build native iOS, Android, Windows, and macOS apps from a single project with full access to native platform APIs and enterprise Microsoft ecosystem integration.
Build Progressive Web Apps that deliver app-like experiences directly through the browser — installable on the home screen, capable of offline operation, and accessible on any device without App Store distribution friction. PWAs are ideal for content-rich applications, tools with broad accessibility requirements, and rapid market entry strategies.
Strategic migration of existing separate iOS and Android native codebases to a unified Flutter or React Native architecture — consolidating your mobile engineering team, eliminating feature parity lag between platforms, and reducing ongoing maintenance costs while retaining full native performance and platform-specific UX conventions.
End-to-end mobile backend development and integration — REST and GraphQL API design, real-time features with WebSockets, Firebase or Supabase backends, cloud function architectures, push notification infrastructure, and third-party SDK integrations (maps, payments, analytics, social auth) across all cross-platform frameworks we support.
Both are excellent choices — but the right answer depends on your team's existing skills, your UI complexity requirements, your timeline, and your long-term platform ambitions. Flutter excels at visually rich, animation-heavy apps and delivers consistent pixel-perfect rendering across all platforms. React Native is ideal when your team has JavaScript/React skills, you need tighter platform-native feel, or you are sharing significant logic with a React web app. Our mobile architects will guide you through an honest evaluation with no agenda other than helping you ship the best possible product.
Get a Free Framework Recommendation iconiconUp to 95% code sharing between iOS and Android while retaining platform-specific UX conventions where they matter.
60fps animations, smooth scrolling, and fast startup times — matching native app performance benchmarks in real-world use.
Shared test suites covering unit, widget, integration, and end-to-end tests running on both iOS and Android simultaneously.
Automated build, test, and deployment pipelines for both app stores using Fastlane, GitHub Actions, and Bitrise.
We leverage the world's leading mobile frameworks, backend services, testing tools, and analytics platforms — ensuring every app we build is fast, secure, and ready to scale from day one.
A mobile-first, agile, and user-centred delivery methodology — from concept and design to App Store submission, launch, and continuous improvement.
We begin with structured discovery workshops to define your target users, core job-to-be-done, competitive positioning, and technical requirements. We advise on the optimal platform strategy — native vs cross-platform, MVP scope vs full feature set — and produce a detailed product specification, user story backlog, and development roadmap with clear milestones.
Our mobile UX team designs user flows, wireframes, and high-fidelity interactive prototypes following platform-specific guidelines — HIG for iOS and Material Design 3 for Android. We validate designs through usability testing with real users before any code is written, ensuring the final product is intuitive, accessible, and conversion-optimised from the first screen.
Development proceeds in 2-week sprints with daily standups, continuous integration, and a working build delivered at the end of every sprint for client review. You have direct access to your SourceMash mobile squad and full visibility through our project management portals — no black boxes, no surprises.
Comprehensive mobile QA across a real device lab covering 30+ Android and iOS device/OS combinations — including functional testing, UI automation, performance profiling, battery drain analysis, network condition testing (2G/3G/4G/WiFi), accessibility compliance, and security penetration testing before every release candidate.
We manage the complete App Store and Google Play submission process — metadata preparation, screenshot and preview video creation, privacy manifest and App Store Review guideline compliance checks, phased rollouts, and launch-day monitoring. Our track record of first-submission App Store approval stands above 95%.
Post-launch managed services including crash monitoring, performance dashboards, OS compatibility updates, user feedback analysis, and iterative feature releases driven by real usage data. We treat your app as a living product — with monthly analytics reviews, feature roadmap planning, and a dedicated mobile engineer on call under our support SLA.
Trusted by startups, enterprises, and everything in between — here's what product leaders and CTOs say about building mobile apps with SourceMash.
SourceMash built our Android and iOS banking apps simultaneously and delivered a quality that genuinely surprised us. Two million users later and a 4.9-star rating, we can honestly say the investment in native development with SourceMash was the best product decision we made in our first two years.
We were skeptical about Flutter initially — we didn't want to compromise on native quality. SourceMash convinced us to try it and the result was indistinguishable from the native apps we'd built before, at 42% of the cost. They really know how to push Flutter to its limits beautifully.
Building a HIPAA-compliant telehealth app is not trivial. SourceMash navigated the technical and compliance complexity flawlessly — their React Native expertise and security engineering meant we went from zero to 300K monthly consultations in under a year. The app is rock solid.
Our mobile development team holds official certifications and development programme memberships from the world's leading mobile platform providers — giving you confidence in every line of code we write.
Perspectives, research, and practical guidance from our enterprise technology experts.
Everything you need to know before reaching out to us.
Should we build a native app or a cross-platform app?
It depends on three things: your budget and timeline, your UI complexity requirements, and your team's existing skills. Native development (Swift for iOS, Kotlin for Android) delivers the absolute best performance and platform integration — ideal for apps that push hardware limits, demand complex animations, or require deep OS-level access (like camera, Bluetooth, or health data). Cross-platform (Flutter or React Native) is ideal when you need to ship to both platforms simultaneously, want to reduce ongoing maintenance costs, and don't need deep platform-specific capabilities. The good news is that modern Flutter and React Native apps are genuinely difficult to distinguish from native — we'll give you an honest recommendation after understanding your specific requirements.
How long does it take to build a mobile app?
A well-scoped MVP typically takes 12–16 weeks from kickoff to App Store submission. This includes 2 weeks for product discovery and UX design, 8–10 weeks of development sprints, 2 weeks for QA and device testing, and 1–2 weeks for App Store review. More complex apps with advanced features like real-time video, machine learning, or complex backend integrations typically run 20–28 weeks. We always provide a detailed project plan with milestones at the proposal stage so you know exactly when to expect each deliverable.
What is the difference between Flutter and React Native?
Flutter uses Dart and its own rendering engine (Skia/Impeller) to draw every UI element directly — giving pixel-perfect, consistent UI across all platforms and outstanding animation performance, but meaning UIs don't use native OS components directly. React Native uses JavaScript/TypeScript and React, and renders actual native UI components on each platform — giving a more platform-native feel but historically with some performance overhead (reduced significantly by the New Architecture). Flutter is typically our first recommendation for visually rich, animation-heavy apps and apps targeting web and desktop in addition to mobile. React Native is ideal when your team has React web experience or you're sharing significant logic with a React web application.
Do you handle App Store and Google Play submission?
Yes — we manage the complete submission process for both App Store Connect and Google Play Console. This includes preparing all required metadata, screenshots, and preview videos; completing privacy declarations and data safety forms; ensuring compliance with the latest App Store Review Guidelines and Google Play policies; and managing the submission, review, and any back-and-forth with Apple or Google reviewers. Our first-time approval rate across both stores stands above 95%. We also manage TestFlight and Google Play internal/closed testing tracks for beta distribution during development.
Can you work with our existing backend and APIs?
Absolutely — we work with existing backends in the vast majority of our engagements. Whether your backend is built on Node.js, Python/Django, Java Spring, .NET, Ruby on Rails, or a headless CMS, our mobile team will integrate with your REST or GraphQL APIs, handle authentication (JWT, OAuth, SAML), manage real-time features via WebSockets or server-sent events, and implement offline sync where needed. We'll review your API documentation during scoping and flag any gaps or improvements that would benefit the mobile experience before development begins.
What does post-launch mobile app support include?
Our post-launch support packages cover crash monitoring and resolution (Crashlytics/Sentry), performance monitoring and optimisation, iOS and Android OS major version compatibility testing and updates, App Store and Play Store policy compliance updates, security patch releases, and feature development sprints driven by user analytics and feedback. We offer flexible retainer models — from essential maintenance-only plans to full managed services with a dedicated mobile engineer, monthly analytics reviews, and a defined feature roadmap. Most clients choose a monthly retainer covering both maintenance and iterative improvement.