Mobile App Development
MobileAppDevelopmentforiOS&Android
Krenaly is a mobile app development agency helping businesses turn an idea, an internal process or a customer-facing product into a polished, custom mobile application — built once, running well on both iOS and Android.
We focus on React Native development because it lets us move fast without compromising on native performance or feel, keeping your app easier and cheaper to maintain over time.
Custom mobile application design
Every app starts with the same question: what should this app do that a website can't? From there, we design an interface that feels native to each platform — respecting iOS and Android conventions users already know, while keeping your brand identity intact.
- Product discovery & feature scoping
- UX flows built around real usage
- Native-feeling iOS & Android UI
- Design systems for future feature growth
iOS & Android development
We build production-ready apps for both platforms, handling everything from navigation and offline behavior to push notifications, device permissions and platform-specific guidelines.
React Native development
React Native lets us share the vast majority of the codebase between iOS and Android, which means faster development, lower long-term maintenance costs, and a single source of truth when you want to ship new features to both platforms at once.
- One codebase, two platforms
- Faster iteration and bug fixes
- Native modules where performance requires it
- Easier long-term maintenance
Backend & integrations
A mobile app is only as useful as what it connects to. We build or integrate with APIs, authentication systems, payment providers, push notification services and analytics so your app functions as part of a complete product, not an isolated screen.
Launch & App Store support
We guide you through the App Store and Google Play submission process — assets, listings, review guidelines and versioning — so launch day goes smoothly and future updates ship without friction.
How we work
We begin with a discovery phase to define the core features and validate scope, then move into design, development in short iterations, and structured QA across real devices before release.
1. Discovery
Define features, platforms and technical constraints.
2. Design
Native-feeling UX/UI for iOS and Android.
3. Build
React Native development in focused iterations.
4. Launch
QA, store submission and post-launch support.
Frequently asked questions
Do you build native apps or cross-platform apps?
We primarily build with React Native, which lets us ship a single, well-crafted codebase for both iOS and Android — reducing cost and keeping features in sync across platforms. Where a project genuinely needs it, we can also scope fully native development.
As a mobile app development agency, what do you actually deliver?
A complete product: UX/UI design, front-end app development, backend and API work, third-party integrations, and support through App Store and Google Play submission.
How long does it take to build a custom mobile application?
A focused MVP typically takes 6-10 weeks; more complete products with backend, authentication and integrations usually run 10-16 weeks depending on scope.
Can you connect the app to my existing systems?
Yes, we regularly integrate mobile apps with existing APIs, CRMs, payment providers and internal tools so the app becomes a real extension of your business, not a standalone product.
What does mobile app development cost?
Mobile applications are quoted individually based on scope and typically start from €4,990. We'll give you a precise estimate after a short discovery conversation.
Have a mobile app idea?
Let's talk through your concept and figure out the fastest path to a working product.