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One codebase for iOS and Android. That’s the practical promise of cross-platform development, and it holds up for most apps that aren’t fundamentally built around platform-specific features (heavy AR, deep system integration, specific iOS or Android idioms taken to the extreme).
We work in Flutter and Kotlin Multiplatform Mobile, and we’ll tell you which one fits your case during discovery (or whether you should actually go native, which happens). The framework choice matters more than the marketing on this page suggests.
One codebase, two platforms, one team. The cost saving isn’t 50% automatic (the marketing pitch you’ve probably already heard), it’s closer to 35-50% in practice. The actual win is fewer ‘wait, this bug only happens on Android 12’ cycles, not a magical halved invoice.
We design once, then make the platform-specific concessions where iOS and Android genuinely differ (navigation patterns, gesture norms, notification handling, share sheets). The result is an app that feels right on both platforms, not the same app forced into two different operating systems.
Fix a bug once, ship to both stores. Add a feature once, watch it land on both platforms. Native module updates still happen (camera APIs, payment SDKs, OS version compatibility), but the day-to-day maintenance load drops by roughly half. That math doesn’t lie.
Mobile app development with Studio Ubique is designed for speed, precision, and results. We customize your tech stack, Flutter, Kotlin Multiplatform, or others, based on your goals. Here’s our process:
01
A week to align goals, audience and budget. We map out which features need real native performance and which can sit on a shared cross-platform layer. Framework choice waits until we’ve answered that question, not before.
02
One week to draft the architecture. Framework choice (Flutter, Kotlin Multiplatform Mobile, or occasionally going native), backend services, data model, offline strategy, push notification routing. You leave this phase with a system diagram, not a vague promise.
03
Two weeks of wireframes, design system, then high-fidelity mockups. We follow iOS and Android conventions where it matters (navigation, controls, share sheets, accessibility) and unify the rest. A click-through prototype goes out for sign-off before any production code is written.
04
Four to ten weeks of build, depending on scope. Shared business logic, platform-specific UI where it has to be different, real-device testing as we go (not just simulators). You see weekly demo builds on TestFlight and Firebase App Distribution, not month-end surprises.
05
One to two weeks of testing. Performance profiling on older devices (not just the latest flagship), memory checks under real load, accessibility validation, store submission preflight. If something fails, you hear about it the same day.
06
Launch, then ongoing iteration. Crash monitoring, analytics-driven improvements, feature work in two-week sprints, OS version updates as Apple and Google release them. Maintenance retainer or hours-based, whichever fits your roadmap.
We’ve been building and maintaining digital products long enough to know what breaks, what scales, and what “urgent” actually means.
Studio Ubique builds cross-platform and native mobile apps for startups and mid-sized companies across France, Germany, Switzerland, the US, Canada and other markets. Some apps run on Flutter, some on Kotlin Multiplatform Mobile, some are fully native because that was the right call for the project.
5.0
“Studio Ubique earned our trust with their expertise and results. What started as one project grew into a long-term collaboration thanks to their consistent delivery and professionalism.”
5.0
“Studio Ubique exceeds expectations every time, clear communication, creative solutions, and reliable delivery make them a trusted, long-term partner for web, design, and branding projects.”
5.0
“Studio Ubique crafted our brand, website, and booking system with standout design, smooth communication, and great value, helping UpNailz shine online and grow with confidence.”
5.0
“Studio Ubique delivered a sleek logistics app that boosted efficiency and cut manual work by 30%. Intuitive design, strong communication, and reliable delivery made them a great fit.”
5.0
“Great quality delivery in a fast time for a good price. I can´t really expect more from a service provider. Big recommendation!”
The questions that come up most often, answered here. Yours not among them? Just ask, there's a human on the other end.
Cross-platform app development means writing one codebase that runs on both iOS and Android instead of building two separate native apps. It makes sense when your features are mostly business logic (forms, lists, dashboards, networking, content delivery) rather than heavy use of platform-specific APIs like deep ARKit, advanced gesture work or platform-exclusive integrations.
For most B2B apps, internal tools, productivity tools, marketplaces and content apps, cross-platform is the practical default. For consumer apps that need to fight for App Store rankings on animation quality and feel, or apps built around features only iOS or Android offers, native is usually the better call. Our mobile app development service covers both options with the framework picked per project.
Both are solid in 2026 but they solve slightly different problems. Flutter (Dart) renders its own UI through Skia, which gives you pixel-perfect consistency across platforms and faster shipping of design-heavy apps. Kotlin Multiplatform Mobile shares business logic but uses each platform’s native UI (Jetpack Compose on Android, SwiftUI on iOS), which suits apps that need to feel deeply native and tap into platform-specific behaviours.
Practical decision factors: your team’s existing skills (Dart vs Kotlin and Swift), how much your design relies on platform-native widgets, whether you need to share code with a Kotlin backend (KMM wins), and what your hiring market looks like for ongoing maintenance. Our development team works in both and we’ll recommend based on your project, not on which one we’d rather use this quarter.
Not exactly. Hybrid traditionally means a web app (HTML, CSS, JavaScript) wrapped in a native shell that uses a WebView to render the UI, like Ionic, Cordova or Capacitor. Cross-platform usually refers to frameworks like Flutter or React Native that compile to native code or render through their own engine. The performance and feel are noticeably different.
Hybrid makes sense for content-heavy apps where a web stack genuinely fits (think a wrapped CMS frontend, an internal docs app or a content portal that already has a web version). For anything that needs smooth animations, complex state management or real-time interactions, cross-platform frameworks outperform hybrid by a wide margin. Custom platform work sometimes mixes both approaches when the use case calls for it.
A cross-platform build typically lands at 50 to 65% of what two native builds would cost, not the “50% automatic” some agencies promise. The actual saving depends on how much shared business logic versus platform-specific UI work your app needs. Our hourly rate is €60 to €65 across roles, NL and India team combined.
Typical project budgets across our work sit between €5,000 and €25,000, with larger app builds reaching €100,000+ when there’s backend infrastructure, multiple third-party integrations, offline support or complex authentication involved. Mobile apps tend to land on the higher end of that range because they need backend services and store submission work alongside the app itself. A short discovery call gives you a scoped range within a few days.
For most use cases, yes. Flutter renders smooth 60 to 120 fps UIs that the average user can’t tell apart from native. Kotlin Multiplatform Mobile uses each platform’s native UI components directly, so at the UI layer it literally is native. The places where users genuinely notice a difference: animation-heavy interfaces with custom physics, deep platform-specific gesture systems, and apps that lean hard on the latest iOS or Android features the moment they launch.
Cross-platform also doesn’t mean “identical on both platforms”. Good cross-platform design respects iOS conventions on iOS (back-swipe gestures, share sheets, navigation patterns) and Android conventions on Android (Material Design, system back button, notification handling). Mobile app design work handles those platform-specific concessions during the design phase, not after launch.
Most cross-platform app builds run 8 to 16 weeks from kickoff to launch. Smaller MVPs with clear scope and a focused feature set ship in 6 to 8 weeks. Apps with custom backend infrastructure, complex offline support, multiple third-party integrations or strict regulatory requirements push toward 4 to 6 months.
The big variable is how decided you are when we start. A clear spec, content ready, design direction agreed and integrations confirmed makes “8 weeks” realistic. Half-decided scope makes it 16 or more. Building two native apps for the same feature set typically adds 30 to 50% on top of any of those numbers. Recent project work shows what realistic timelines look like in practice.
One bug fix ships to both platforms in one update cycle. Same for new features, security patches and third-party SDK updates. Platform-specific work still exists (App Store and Play Store submissions, OS version compatibility checks when Apple or Google release a new version, occasional native module updates), but the maintenance load is roughly 40 to 50% of running two separate codebases.
Real numbers from past projects: a one-developer maintenance retainer covers what would typically need two developers if the app were built natively for each platform. Maintenance and ongoing support work covers updates, monitoring, store submissions, security patches and feature work in a steady rhythm rather than panicked sprints.
Book a quick 30 min video call, we will show you exactly what to fix. We reply within 24 hours.
