Cross-platform mobile apps for iOS and Android
Development of mobile apps with complex business logic — from idea and Figma prototype to App Store and Google Play publishing and ongoing support.
Review
What are we developing
We do custom mobile app development — for a specific business task, without templates or builders. Every project is built from scratch: from choosing the architecture and designing the UX to publishing in the stores and handing over to the client's team.
Every app is designed for the specifics of the business: its processes, audience and infrastructure. That means that before development begins we dive deep into the task: we study how employees or users work, what data is needed offline, and where speed and interface responsiveness are critical.
Our apps work with APIs and external systems, support offline mode, push notifications and complex UI scenarios. After launch we train the client's team to work with the product and stay on for support: we fix bugs, release updates for new OS versions, and add new functionality as the business grows.
It matters to us that an app solves a real problem rather than just existing. That's why we ask the uncomfortable questions at the brief stage: who will use the app, in what conditions, and what they want to achieve. The answers directly affect architectural decisions and feature priorities.
Swift, supports iOS 15+, all Apple system APIs
Kotlin, Android 10+ support, Google services
Node.js or FastAPI, REST, authorization, roles
Preparing, reviewing, publishing
Comparison.
Native vs hybrid development: what's the difference
Mobile development splits into two approaches: native and hybrid. Native means the iOS app is written in Swift and the Android app in Kotlin. It's not a wrapper over web technologies but full-fledged code that interacts directly with the operating system. Such an app behaves exactly as the user of each specific platform expects.
Hybrid frameworks — Flutter and React Native — let you create a single codebase for both platforms. This saves time and money at the start: one developer writes code that runs on both iOS and Android. A good choice for an MVP, simple apps or a limited budget, when time to market matters more than platform precision.
Mobile app development with a native approach is a different level of quality. The app fully uses system APIs (Face ID, Apple Pay, Google Pay, NFC, HealthKit), runs more smoothly and uses less battery. The interface behavior matches the expectations of each platform's users: iOS and Android are different ecosystems with different logic for navigation, gestures and interaction. The native approach accounts for this; the hybrid one only partly.
Below is a detailed comparison of the two approaches by key criteria:
| Criterion | Native (Swift / Kotlin) | Hybrid (Flutter / React Native) |
|---|---|---|
| Performance | Maximum — native code with no layers or bridge to the OS | Lower, especially noticeable with complex animation and heavy business logic |
| Access to system APIs | Full: Face ID, Apple Pay, NFC, HealthKit, ARKit, Bluetooth | Partial — some APIs are unavailable or require third-party plugins |
| UX and platform specifics | Follows iOS HIG and Android Material Design natively | Requires extra adaptation to each OS's patterns |
| Codebase | Separate for iOS (Swift) and Android (Kotlin) | Single for both platforms |
| Mobile app development cost and timelines | Higher at the start, lower with long-term support and scaling | Cheaper and faster at first — a trade-off in quality and flexibility |
| When to choose | A complex product where performance, UX quality and long-term support matter | MVP, simple apps, a limited budget, quick hypothesis testing |
If performance, deep hardware integration and correct UX matter to you, the native approach justifies the investment — especially for long-term use of the product. If the task is to quickly test a hypothesis on a limited budget, a hybrid framework can be a reasonable choice.
Opportunities
What is included in development
Design and UX
⌄We start with an analysis of the business task and target audience. We build the user flow, draw wireframes, and design the UI/UX in Figma. We prepare an interactive prototype for approval before development begins — this helps surface contentious points and fix them before they become expensive. For offline mode, we separately design the data synchronization logic: what is cached locally, when it updates, and how conflicts are resolved when several devices make changes in parallel.
The prototype is agreed with the client and approved before development begins. This protects both sides: the client knows exactly what they'll get, and the developers work from a clear technical specification.
iOS Development (Swift)
⌄A native app for iPhone and iPad, iOS 15+ support. Integration with Apple's system services: Face ID, Apple Pay, HealthKit, ARKit, Push Notifications. We account for the specifics of the Apple ecosystem: App Store rules, privacy requirements, background-execution limits and the specifics of working with permissions.
Preparation for review and publishing on the App Store — we prepare metadata, screenshots and the description in line with Apple's requirements so we pass review on the first or second attempt.
Android Development (Kotlin)
⌄If you need to order a mobile app for Android, we'll build a native product for smartphones and tablets (Android 10+ support). Integration with Google services: Maps, Pay, Firebase. Publishing on Google Play.
Adaptation for different screen sizes, pixel densities and OS versions. Android is a fragmented platform: we account for this in design and testing.
Backend and API
⌄We develop the server side from scratch or connect to the client's existing API. We use Node.js and FastAPI, build REST and WebSocket connections, and set up authorization, a role model and data security. We design the API with mobile constraints in mind: minimizing the number of requests, optimizing data transfer for slow connections, and implementing pagination and caching.
Integrations
⌄We connect payment systems (LiqPay, Stripe, Apple Pay, Google Pay), push notifications via FCM and APNs, analytics (Firebase, Amplitude, Mixpanel) and the client's external systems: CRM, ERP, dealer platforms, accounting systems. Integrations are tested on real scenarios, including behavior on an unstable connection, timeouts and retries.
Testing and Launch
⌄We test on real devices across different iOS and Android versions, not just simulators. We check offline scenarios, performance under high load, the correctness of data synchronization and behavior on an unstable connection. We separately test edge cases — boundary situations that real users will inevitably reproduce. After launch we provide 30 days of warranty support.
Casey
Mobile Projects Implemented
Real Problems - Real Solutions
E-WAC
Partnership with the client — 22+ years
Challenge: reduce vehicle intake time and eliminate disputes between the client and the service about the car's condition before and after servicing.
An app for a 360-degree vehicle inspection at service intake. Photos, video, comments — everything is recorded and sent to the dealer's system in real time.
Result: Full transparency of the vehicle's condition at intake, eliminating disputes between client and service. The app runs on iOS and Android and is published on the App Store and Google Play. No data loss in years of operation.
Process
Development process stages
A transparent process with fixed milestones — the client always knows what's happening, what's next and how long it will take
Brief and evaluation
We qualify the task: what the product is, who it's for, on which platforms. A commercial proposal within one or two business days
Discovery
User flow, architecture, Figma prototypes, offline logic and integrations. Everything is agreed before development begins — with no unexpected changes along the way
Design
UI/UX per iOS Human Interface Guidelines and Android Material Design. A design system and a component library
Development
Native iOS and Android development — in parallel or sequentially. API, integrations, dev, staging and production environments
Testing
Functional and regression testing on real devices, including edge cases. We fix bugs before release
Publication and support
Preparation for App Store and Google Play requirements, passing review, publishing. Support SLA and scheduled updates
After publishing we don't disappear. We support the app: monitor crash reports, release updates for new iOS and Android versions, and add functionality per the product roadmap.
For whom
Which businesses we build turnkey mobile apps for
We work with different types of businesses: from startups at the idea stage to large enterprises with established systems and hundreds of internal users
Warehouses, service teams, logistics, dealer networks. Offline mode with synchronization — data isn't lost
B2C and B2B apps with registration, a personal dashboard, payments, role-based access and personalization
A fast launch of a mobile product to test a hypothesis with a minimal feature set — without unnecessary costs
A mobile app as a frontend to an internal platform via API — without rewriting the infrastructure
Mobile app development starts with analyzing the task: we understand the business processes, audience and existing systems — and only then propose an architecture and a technology stack
Discuss project →Timelines
Mobile app development timelines
We don't name timelines at random. We fix exact dates at the Discovery stage, once the full picture of requirements, the architecture and the scope of integrations is clear. After that the timeline is written into the contract and doesn't change without the client's agreement.
Contacts
Order a mobile app
Tell us about your task — we'll reply within one business day. Ordering a mobile app is simple: we'll start with a short brief, estimate the scope of work and propose the optimal approach for your business.
We work both on new products from scratch and on projects that need refinement or expansion of an existing app. We're ready to discuss the task on a call — with no obligations or long forms.
Discuss project →FAQ
Frequently asked questions about mobile app development
What is the cost of mobile app development?
⌄How much it costs to build an app depends on functionality, the number of screens and the complexity of integrations. We calculate the price for mobile app development after the brief and the Discovery stage: that's when the architecture, the list of integrations and the scope of design are clear. You get a fixed estimate with no hidden surcharges along the way.
How long does mobile app development take?
⌄From 6 weeks for a simple MVP to 5+ months for a complex product. The timeline for custom mobile app development depends on the number of platforms, functionality and integrations. We fix exact dates after Discovery — and stick to them.
How long does app publishing take?
⌄The App Store usually reviews an app in 1–3 business days, Google Play — from a few hours to 3 days. We prepare all materials in line with store requirements and pass review.
Native or cross-platform app — which is better?
⌄Native is faster, higher quality and gives full access to system APIs. A cross-platform app is cheaper and faster at the start, but with limitations. Our mobile app development studio will discuss your task, budget and planning horizon — and propose the approach that's best for your specific case.
Can I control the development process?
⌄Custom app development at our studio means sprints with a demo after each stage and approval of the next step. You get access to a task tracker, regular status updates and interim builds for testing yourself. No black boxes.
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