We build high-performance, privacy-compliant Mobile SDKs that developers actually want to integrate. Cross-platform logic via Kotlin Multiplatform, on-device AI with Gemini Nano and LiteRT, and audit-ready compliance documentation. We handle the full lifecycle: architecture, development, and distribution on SPM, CocoaPods, and Maven Central.
Foresight Mobile engineers enterprise-grade SDKs using Kotlin Multiplatform (KMP) for shared business logic with native binary interfaces, as well as dedicated SDKs for Flutter, React Native, iOS (Swift Package Manager & CocoaPods) and Android (Maven Central & Gradle).
Kotlin Multiplatform has emerged as the definitive standard for SDK development in 2025. Unlike full cross-platform frameworks, KMP produces standard native binaries (XCFrameworks for iOS and AARs for Android) that integrate directly into any tech stack. Your customers receive a "native-feeling" SDK regardless of whether they're building in Swift, Kotlin, React Native, or Flutter.
If you already have native SDKs for iOS and Android, we can cost-effectively wrap your existing libraries to expand into the cross-platform market. If you're providing a web or REST-based service, we can bring your products to mobile using our SDK development best practices.
Modern SDKs increasingly leverage the device's Neural Processing Unit (NPU) for offline-first intelligence. We integrate Small Language Models (SLMs) and specialised neural networks directly into SDKs using LiteRT (TensorFlow Lite), CoreML, and ExecuTorch. This enables real-time inference, on-device RAG, and privacy-preserving analytics without cloud dependency.
Every SDK release includes automated Software Bill of Materials (SBOM) generation in CycloneDX/SPDX formats, iOS Privacy Manifests for App Store compliance, and security hardening with certificate pinning and obfuscation. We help you meet EU Cyber Resilience Act and GDPR requirements by design.
When distributing iOS SDKs, developers need to understand Apple's distribution requirements. Our comprehensive iOS app distribution guide covers everything from TestFlight beta testing to App Store distribution for SDK developers.
We publish our own open source packages. See some of our Flutter packages on pub.dev.
An actionable four-week plan with clear deliverables and an unbeatable £3,500 price point, credited against your first development sprint.
Total client time commitment: 5-7 hours across 4 weeks
We meet with your key stakeholders to understand your business goals, user needs, and technical constraints. You'll share any existing research, designs, or documentation you have.
Our engineering team assesses the technical feasibility, identifies integration points with your existing systems, and evaluates architecture options.
We determine whether Flutter, native development, or another approach makes the most sense for your specific requirements.
We create clickable prototypes so you can experience your app before it's built. You'll test navigation flows, validate the user experience, and gather feedback from stakeholders.
Alongside this, we prioritise features based on business value and technical complexity, mapping out a phased delivery plan with a detailed cost estimate.
You receive your complete Gameplan pack, plus a presentation walkthrough with Q&A. Your team walks away with everything needed to make a confident decision.
Enterprise SDK engineering with native distribution to Swift Package Manager, CocoaPods, Maven Central, Gradle and NPM
High-value customers adopt your SDK faster with hands-on integration support. From white-label SDK customisation to technical assistance alongside your developer advocates, the goal is accelerating adoption and reducing time-to-value.
Secure, offline-resilient telemetry for MAU, session, or event-based billing, designed into the architecture from day one. From usage-based pricing infrastructure to Open Core strategies, the boundary between community and enterprise features is clearly defined.
Developers champion SDKs that feel native. Idiomatic APIs with native-feeling syntax for Swift and Kotlin, AI-optimised design for smooth GitHub Copilot integration, thorough documentation with copy-paste ready snippets, and frictionless distribution via Swift Package Manager, Maven Central, and npm.
Your SDK meets EU Cyber Resilience Act requirements out of the box. Every release includes automated SBOM generation (CycloneDX/SPDX), iOS Privacy Manifests for App Store compliance, and VEX documentation for vulnerability analysis. Certificate pinning, obfuscation, and tamper-detection come standard.
Offline-first AI features with zero-latency performance and complete GDPR/CCPA compliance, built directly into your SDK. On-device AI models and neural networks run natively via Gemini Nano, Core ML, and LiteRT, enabling real-time inference, on-device RAG, and predictive analytics.
Share 90-99% of business logic across iOS and Android while producing native XCFrameworks and AARs. Built with Kotlin Multiplatform (KMP), your SDK appears 100% native to developers in any tech stack (Swift, Kotlin, React Native, or Flutter) without imposing runtime overhead or inflating app size.
A Software Bill of Materials (SBOM) is a formal inventory of every component, library, and dependency in your SDK. Required by regulations like the EU Cyber Resilience Act and US Executive Order 14028, SBOMs provide complete transparency about your software supply chain.
Enterprise customers demand SBOMs (in CycloneDX or SPDX format) to manage security risks. They need to know immediately if a vulnerability like Log4j affects their applications. We also provide VEX (Vulnerability Exploitability eXchange) documents that clarify whether flagged vulnerabilities actually impact your SDK, reducing false positives for your customers' security teams.
iOS Privacy Manifests (PrivacyInfo.xcprivacy) are mandatory declaration files that every SDK must include since Apple's 2024 enforcement. They explicitly declare what data the SDK collects (contact info, location, identifiers) and which "Required Reason APIs" it accesses (disk space, boot time, user defaults).
If your SDK fails to include a valid Privacy Manifest, the entire integrating application faces App Store rejection. This makes Privacy Manifest compliance a non-negotiable requirement for SDK vendors. At Foresight Mobile, we automatically generate Privacy Manifests for every SDK release, ensuring your distribution is never blocked by Apple's review process.
Kotlin Multiplatform (KMP) is a technology that allows SDK developers to write business logic once in Kotlin and compile it to native binaries for multiple platforms. Unlike Flutter or React Native, KMP produces standard XCFrameworks for iOS and AARs for Android that appear 100% native to consuming developers.
For SDK development, KMP solves a critical problem: your iOS customers expect a Swift interface, while Android customers expect Kotlin. KMP delivers both from a single codebase, enabling 90-99% logic sharing without imposing any runtime overhead on the host app. This reduces maintenance costs, ensures consistent behaviour across platforms, and produces smaller binary sizes than alternative cross-platform approaches.
A REST API defines the communication protocol: HTTP methods (GET, POST, PUT, DELETE) for data exchange over the internet. In 2026, APIs typically include GraphQL endpoints, WebSocket connections for real-time data, and OpenAPI specifications for documentation.
An SDK (Software Development Kit) is a complete toolkit that wraps the API with type-safe libraries, authentication handlers, error management, offline caching, and platform-native interfaces. Modern SDKs are designed for AI-assisted development, with idiomatic naming conventions that help GitHub Copilot predict correct usage. While APIs define what is possible, SDKs abstract complexity and accelerate integration. For example, the Stripe SDK handles payment processing complexities (authentication, retries, webhooks, SCA) that would require hundreds of lines of manual API code.
Mobile SDKs in 2026 span diverse categories, increasingly featuring on-device AI capabilities:
• Edge AI/ML SDKs: LiteRT (TensorFlow Lite), CoreML, ExecuTorch, MediaPipe for on-device intelligence and SLM deployment
• Analytics SDKs: Google Analytics 4, Mixpanel, Amplitude with privacy-preserving on-device processing
• Payment SDKs: Stripe, Square, Adyen with strong customer authentication (SCA)
• Cloud SDKs: AWS Mobile, Google Cloud, Azure with offline-first sync
• AR/VR SDKs: ARCore, ARKit, Reality Kit for spatial computing
• Authentication SDKs: Auth0, Firebase Auth, Okta with passkey support
• Messaging SDKs: Twilio, SendBird, Stream for real-time chat
• Identity Verification: Onfido, Jumio, Veriff for KYC/AML compliance
• Crash Reporting: Crashlytics, Sentry, Bugsnag with SBOM integration
• Push Notifications: OneSignal, Firebase Cloud Messaging, Airship
A Mobile SDK (Software Development Kit) is a complete toolkit that enables developers to integrate specific functionality into their apps without building from scratch. In 2026, enterprise-grade SDKs go far beyond basic libraries. They include on-device AI capabilities, automated compliance documentation, and "native-feeling" APIs for every platform.
Modern SDKs provide access to device capabilities (camera, GPS, biometrics, NPU), handle complex operations (payments, authentication, analytics), and ensure regulatory compliance. Built with Kotlin Multiplatform for shared logic, they produce native XCFrameworks and AARs that slot directly into any tech stack. Key features include modular architecture for minimal binary size, privacy-preserving on-device processing, and automatic iOS Privacy Manifest generation.
Mobile SDK development costs in 2026 vary based on complexity, compliance requirements, and AI capabilities. Basic SDKs wrapping REST APIs with authentication and offline caching cost £5,000-15,000. Intermediate SDKs with Kotlin Multiplatform shared logic, SBOM generation, and Privacy Manifests range from £25,000-60,000. Enterprise SDKs featuring on-device AI, real-time sync, usage-based metering, and full compliance documentation cost £75,000-200,000+.
Key cost factors include: platform coverage (iOS, Android, Flutter, React Native), on-device AI integration (model optimisation, NPU targeting), compliance requirements (SBOM, VEX, Privacy Manifests), documentation quality, sample applications, and ongoing maintenance. Kotlin Multiplatform can reduce multi-platform costs by 40-60% compared to separate native codebases.
The best apps come from close partnership. Your vision drives every decision while our experience and App Gameplan guides you around the pitfalls that cause 70% of app projects to fail.
Start with a 30-minute call. No pressure, no sales pitch. Just an honest conversation about your project.
Get in Touch
Laying the Foundation for Success
You share your vision, target audience, and business objectives. We research, challenge assumptions, and
deliver a clearly defined app concept with competitive analysis and a detailed project roadmap.
Creating an Engaging and Intuitive Experience
You'll test high-fidelity prototypes on real devices before a line of code is written. Usability problems
caught here cost a fraction of what they cost in development.
Building Future-Proof Code You Can Scale
Your design becomes a working app, built to industry best practices and tested across multiple devices. You get code that's straightforward to maintain and extend as your business grows.
Ensuring Long-Term Success Through Partnership
We guide you through App Store submission, optimise your listing for downloads, and proactively monitor performance after launch. Your app's success doesn't end at go-live.
Your app, your way. Here's how we make it happen.
Our process begins with a comprehensive project plan and a transparent, fixed cost agreement. This ensures you know exactly what you're getting and how much it will cost, eliminating any unwelcome financial surprises. Regular progress calls with live demos give you a front-row seat to your app's development, keeping you informed and involved at every stage.
We're not just here for the build, we're here for the long haul. From navigating the App Store maze to providing ongoing technical support, we're with you all the way. Our expertise doesn't end at launch; we offer cost-effective maintenance plans and helpful guidance to ensure your app continues to thrive and evolve with your business. Your success is our success, and you can count on us every step of the way.
We believe the best apps are born from real user experiences. That's why user testing is at the core of everything we do. We involve real people from your target audience throughout the development process to ensure your app is intuitive, engaging, and truly meets their needs. Their honest feedback helps us to refine and enhance your app, resulting in a product that's not only user-friendly but loved by your users.
You know your business inside and out and we know how to make successful tech businesses. With years of hands-on CTO and app development experience, we're experts at understanding your needs and crafting innovative solutions that fit your budget and exceed expectations. Our collaborative process and hands-on prototyping ensure your final product isn't just an app – it's the realisation of your vision.
Our founder has been making mobile apps since 2003, before they were even called apps! Founded in 2017, we've got quite a few projects under our belt and a wealth of experience to call upon. Our core development team have been with us since the start, and one of the reasons we're considered the most experienced Flutter app development company in the UK.
We believe in the power of face-to-face collaboration. That's why we encourage you to visit us at our Manchester offices whenever you like. We're a friendly bunch, and we thrive on the energy and clarity that comes from an in-person chat. Building strong relationships is key to our collaborative approach, and we want you to feel comfortable dropping by for a brainstorming session, or just for a brew if you fancy.
