Best 9 Cross-Platform App Development Agencies | Hire Best One

What Is a Cross-Platform App Development Agency

A cross-platform app development agency is a team that builds applications that work on iOS, Android, and the web using a single shared codebase.

These cross-platform agencies focus on delivering fast performance, consistent design, and a smooth user experience across all devices. Instead of building three separate apps, they use modern tools that speed up development, reduce cost, and make updates easier.

A strong cross-platform agency also supports backend systems, APIs, automation, and long-term scalability so the product can grow as your business grows.

• Teams specializing in building apps for iOS, Android, and Web using one codebase
  These teams work with frameworks that allow apps to run on multiple platforms without writing separate code for each. This helps reduce development time while keeping the app stable and consistent across devices.
• Expertise in no-code and low-code tools
  Modern cross-platform agencies use platforms like FlutterFlow, Bubble, and Glide to build cross-platform apps faster. These tools generate clean, scalable code and let teams deliver features quickly without traditional engineering delays.
• Ability to deliver native-like performance across devices
  A good cross-platform agency ensures smooth animations, fast loading, and strong UI even when the app runs on different screen sizes. Their experience helps them match the quality of fully native apps.
• Support for backend, APIs, and long-term scaling
  Cross-platform apps need strong backend systems, secure APIs, and architecture that grows with user demand. Cross-platform agencies handle databases, authentication, cloud setup, and future updates so your app stays reliable over time.

A cross-platform app development agency helps you launch faster, manage costs better, and deliver a unified experience to all users across iOS, Android, and web.

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Why Businesses Hire a Cross-Platform Development Agency

Businesses hire a cross-platform development agency when they want to build apps for iOS, Android, and the web without managing three separate development cycles. Cross-platform development speeds up delivery, reduces cost, and helps companies maintain a consistent user experience across devices.

These cross-platform agencies use modern frameworks and low-code tools to launch apps faster and keep future updates simple. This approach is ideal for startups, growing businesses, or teams looking to test ideas quickly and scale over time.

• Faster development compared to separate native apps
  Building three apps separately takes months and requires larger engineering teams. Cross-platform agencies use one codebase, which reduces development time and accelerates your product launch.
• Lower costs with one shared codebase
  Since the app is built once and deployed everywhere, companies avoid paying for multiple native teams. This reduces upfront costs and long-term maintenance expenses.
• Unified UI and UX across all platforms
  Cross-platform agencies design screens and interactions that look and feel consistent on iPhones, Android devices, and the web. This improves brand consistency and makes the app easier for users to navigate.
• Faster maintenance and updates
  When new features or fixes are needed, cross-platform agencies update one codebase instead of three. This simplifies product management and reduces the time required to roll out improvements.
• Ability to launch simultaneously on multiple platforms
  Cross-platform apps can be released on the App Store, Google Play, and the web at the same time. This helps businesses reach a wider audience and test the product faster.

Hiring a cross-platform development agency helps you save time, reduce costs, and launch a consistent, scalable product across multiple devices.

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Read more | How to build a cross-platform app with FlutterFlow

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Key Services Offered by Cross-Platform Development Agencies

Cross-platform development agencies offer a full set of services to help businesses build apps that run smoothly across iOS, Android, and the web. Their work includes planning, design, development, automation, testing, and long-term support.

Many modern cross-platform agencies use low-code platforms like FlutterFlow to speed up development while still delivering clean UI, strong performance, and scalable architecture. These services make it easier for companies to launch faster, maintain one shared codebase, and grow their product over time.

• Custom cross-platform app development
  Cross-platform agencies build apps that work on multiple platforms using a unified codebase. This reduces development time, lowers cost, and ensures consistent performance across devices without managing separate native apps.
• FlutterFlow development services
  Many teams specialize in FlutterFlow for rapid development. FlutterFlow generates real Flutter code, supports custom logic, and helps cross-platform agencies build apps faster with native-like quality. It is ideal for MVPs, internal tools, and full-scale products.
• UI and UX design for multi-platform apps
  Cross-platform agencies create layouts and flows that work well on different screen sizes. Their design work ensures that users get a smooth, visually consistent experience whether they use iOS, Android, or web apps.
• Automation and API integrations
  Cross-platform apps often need external data and workflows. Cross-platform agencies integrate APIs, payment systems, CRMs, and automation platforms like n8n, Make, or Zapier to support real-time operations and smart features.
• Custom animations and performance optimization
  Cross-platform agencies build smooth animations and optimize loading, navigation, and transitions. This helps the app feel fast and polished on all devices.
• Testing and QA across multiple devices
  Apps are tested on different screen sizes, operating systems, and network conditions. QA teams fix bugs, improve stability, and ensure the app performs well everywhere.
• App Store and Play Store publishing
  Cross-platform agencies handle metadata, screenshots, app signing, and submission to both stores. Their experience helps avoid rejection and ensures a clean release process.
• Post-launch support and updates
  After launch, cross-platform agencies maintain the codebase, add new features, and optimize performance. One unified codebase makes updates faster and easier.

Cross-platform development agencies help you build scalable, high-quality apps for every device using a faster and more cost-effective approach.

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Read more | Best Flutter App Development Agencies

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Best 9 Cross-platform App Development Agencies (Updated list)

These nine cross-platform app development agencies stand out for building fast, scalable apps that work seamlessly across iOS, Android, and the web. 

Each agency brings strong technical depth, modern low-code expertise, and proven experience delivering multi-device products built for long-term growth.

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1. LowCode Agency

LowCode Agency builds cross-platform applications using a strategy-first approach that focuses on how your business operates and what it needs to scale. Most cross-platform apps do not require long traditional coding cycles.

Modern no-code and low-code platforms allow us to create scalable, high-performance apps much faster. We use Bubble, FlutterFlow, and Glide to deliver solutions that work across iOS, Android, and the web with one unified foundation.

With more than 350 products delivered across real estate, logistics, finance, retail, and SaaS, we create systems that streamline workflows, clarify operations, and support long-term growth.

• Cross-platform apps built with no-code and low-code tools
  We use FlutterFlow for native-quality mobile apps, Bubble for complex logic and web apps, and Glide for fast PWAs. This approach speeds up development, reduces cost, and still supports strong scalability as your product evolves.

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• Faster and more flexible than traditional development agencies
  Traditional coding requires large engineering teams and long timelines. Our low-code approach delivers the same core functionality much faster, allows easier iteration, and avoids unnecessary development overhead.
• Strategic product partnership, not just development
  We work as an embedded product team. We help shape your roadmap, define user flows, design clean interfaces, and make decisions that support long-term product health, not just deliver features.
• AI and automation capabilities for smarter workflows
  Using tools like n8n, Make, and Zapier, we automate repetitive tasks, connect internal systems, and create AI-driven features that improve speed and decision-making across your app.
• Optional ongoing support for updates and scaling
  We continue partnering with you after launch by providing updates, improvements, and support as your user base grows and your product needs evolve.

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LowCode Agency delivers cross-platform applications built for speed, clarity, and long-term growth. 

Reach out and discuss how we can help bring your next multi-device product to life.

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Read more | Best Fintech Development Agencies

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2. Cheesecake Labs

Cheesecake Labs is a Brazil- and US-based agency known for polished mobile and web apps built using Flutter, React Native, and modern backend stacks. They deliver strong UX/UI and engineering depth, making them a solid option for companies seeking cross-platform apps with consistent performance and design across devices.

Their engineering-first approach ensures flexibility and scalability, but like most full-development agencies, projects can involve longer timelines and higher budgets compared to low-code platforms that accelerate delivery while maintaining cross-platform consistency.

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Read more | Best No-Code Mobile App Builders

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3. Appinventiv

Appinventiv is a large-scale development company specializing in enterprise-grade mobile and cross-platform products using Flutter, React Native, and custom backend systems. They support complex requirements across fintech, real estate, eCommerce, and logistics, delivering robust architectures for brands with high-volume traffic or heavy data needs.

Because they rely on traditional engineering workflows and multiple dedicated teams, Appinventiv’s projects often require multi-month cycles and substantial budgets, a different approach from low-code teams designed for faster iteration and more flexible cross-platform development.

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Read more | Can I Build a Mobile App with Bubble?

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4. Netguru

Netguru is a global consultancy known for high-quality digital products across mobile, web, and SaaS. They use React Native and Flutter to build cross-platform applications with strong design systems and enterprise-grade infrastructure. Their teams support brands across fintech, retail, mobility, and real estate.

Netguru’s engineering-led model enables deep customization, though it also leads to longer development cycles and heavier maintenance, contrasting with low-code frameworks that support rapid cross-platform iteration without the same engineering footprint.

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Read more | Business Mobile App Development Guide

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5. Ideamotive

Ideamotive connects companies with dedicated engineering teams to build cross-platform apps using Flutter and React Native. They focus strongly on team augmentation and custom development, offering flexibility for brands needing long-term partnerships paired with strong technical execution.

While their talent network is a major advantage for scaling engineering resources, the traditional full-stack model means longer timelines and higher dev overhead than low-code teams that deliver multi-platform apps with leaner setups.

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Read more | Ecommerce Mobile App Development Guide

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6. GoodBarber

GoodBarber is a no-code/low-code platform that enables businesses to build cross-platform mobile apps without traditional engineering. They focus on ease of use, template-based flows, and native exports for iOS and Android, making them appealing to small businesses or teams needing simple mobile apps quickly.

While GoodBarber offers speed and affordability, their template-driven structure limits customization and scalability, making them less suited for complex logic or multi-platform ecosystems, areas where agencies with low-code or full-dev teams provide more robust development options.

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Read more | How to hire mobile app developers

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8. Miquido

Miquido is a Poland-based product development company that builds mobile and cross-platform applications using Flutter and React Native. Their focus is design-led engineering, making them a strong fit for brands looking for polished interfaces and scalable architectures.

As a traditional dev agency, Miquido delivers high-quality apps with deep technical customization, but this approach requires longer delivery timelines and higher engineering budgets, in contrast with low-code frameworks that streamline multi-platform builds.

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Read more | Mobile app development guide

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9. AppIt Ventures

AppIt Ventures is a US-based development company specializing in mobile and cross-platform apps with an emphasis on healthcare, construction, logistics, and real estate. They build custom workflows, data-driven interfaces, and scalable backend systems for businesses needing multi-platform access.

Their engineering expertise is strong, though it comes with the usual constraints of full custom development: larger budgets, longer timelines, and higher maintenance, a clear contrast with low-code delivery models optimized for faster cross-platform rollout.

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Read more | Mobile app MVP development guide

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How to Choose the Best Cross-Platform App Development Agency

Choosing the best cross-platform app development agency helps you launch a product that works smoothly across iOS, Android, and the web while keeping development fast and cost-effective.

A strong cross-platform agency uses modern tools, understands multi-platform UI, builds scalable backend systems, and supports advanced features like automation or AI.

Comparing the right factors ensures you pick a partner who can deliver a high-quality, unified product and support long-term scaling.

• Use of no-code and low-code platforms
  Cross-platform agencies using tools like FlutterFlow, Bubble, and Glide deliver cross-platform apps faster with one shared codebase. This reduces cost, speeds up changes, and still supports custom logic and exportable code for scaling.
• Reviewing multi-platform case studies and portfolio
  Look for apps the cross-platform agency has shipped across iOS, Android, and web. Real examples show how well they handle responsiveness, performance, and consistent user experience across devices.
• Evaluating experience with advanced app logic
  Cross-platform apps often need offline mode, real-time sync, roles/permissions, or complex workflows. Cross-platform agencies with strong logic experience build systems that stay stable even as features grow.
• Checking UI and UX design quality across devices
  The cross-platform agency should design screens that adapt to different platforms without breaking layout or usability. Good design ensures users get a smooth, consistent experience whether on mobile or desktop.
• Understanding automation and AI capability
  Modern apps rely on automation tools and AI features. Cross-platform agencies familiar with n8n, Make, Zapier, and AI models can build smarter workflows, dashboards, and predictive features.
• Transparent communication and development process
  A reliable cross-platform agency shares progress, timelines, and decisions clearly. Structured workflows for design, development, testing, and updates reduce delays and confusion.
• Clear pricing, scope, and delivery timelines
  Good cross-platform agencies explain costs and milestones before starting. Predictable scope and deadlines help you plan your launch and avoid surprises.
• Ability to scale and support long-term growth
  Cross-platform apps must evolve over time. Cross-platform agencies should design scalable architecture and offer ongoing support so your product stays stable as your user base grows.

Choosing the right cross-platform development agency ensures faster delivery, lower costs, and a unified product experience across every device.

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Read more | Native mobile app development

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Red Flags When Choosing a Cross-Platform Agency

Choosing the wrong cross-platform app agency can slow down your product, increase costs, and lead to performance issues across devices. A strong cross-platform agency should know how to build consistent UI, optimize performance, and support automation and backend workflows.

If cross-platform agency lacks multi-platform experience or uses outdated methods, your app may struggle to scale. Watching for these red flags helps you avoid unstable results and wasted budget.

• Use of traditional methods
  Cross-platform agencies that rely only on heavy coding often take longer and cost more. Modern cross-platform apps benefit from no-code and low-code tools like FlutterFlow or Bubble that speed up delivery while still supporting advanced features.
• No real multi-platform portfolio
  If cross-platform agency cannot show apps running on iOS, Android, and the web, their experience may be limited. A missing portfolio is a clear sign they may not understand multi-device performance or responsive UI.
• Overreliance on templates or boilerplate code
  Cross-platform agencies that only reuse templates often fail to support custom features. This leads to generic apps that cannot scale or handle complex business logic.
• Very low pricing without technical clarity
  Cheap quotes usually hide weak planning, missing functionality, or unclear architecture. A good cross-platform agency provides detailed scope, timelines, and deliverables before starting.
• Weak knowledge of backend or cloud systems
  Cross-platform apps rely on strong backend structure and real-time data. Cross-platform agencies without backend or cloud experience may build unstable systems that break under heavy load.
• No post-launch support or documentation
  Apps need updates, bug fixes, and improvements. Cross-platform agencies that provide no documentation or ongoing support leave you with technical debt and no clear path for growth.
• No multi-device testing capability
  Cross-platform apps must work on different screen sizes and operating systems. Cross-platform agencies that skip device testing risk delivering apps with UI issues and performance problems.

Avoiding these red flags ensures your cross-platform app is stable, scalable, and ready for real-world users across every device.

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Read more | No-code mobile app development guide

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Conclusion

A great cross-platform development partner delivers apps that run smoothly on iOS, Android, and the web from a single, scalable codebase. The best cross-platform agencies combine strong UI design, fast performance, automation capability, and modern low-code tools to help you launch faster and maintain your product easily.

When comparing cross-platform agencies, look at their multi-platform portfolio, use of tools like FlutterFlow or Bubble, backend expertise, and ability to handle complex workflows. Clear communication, predictable timelines, and long-term support are also key factors for success.

LowCode Agency builds cross-platform apps faster and smarter using low-code technology and proven engineering practices. With 350 plus digital products delivered, we help businesses launch scalable apps without the long development cycles of traditional teams. Reach out and discuss your project with us.