Cold Start Under 2 Seconds
The app opens in under 2 seconds on agreed mid-range Android devices, before users lose patience.
React Native App Development Services
React Native app development for iOS and Android from one codebase for startups and scale-ups. First version in the App Store and Google Play in 90 days.
80
Certified Engineers
12+
Years of Developers' Experience
15
Countries with Active Clients
Professional React Native Mobile App Development Services
A mobile app for iOS and Android needs to launch on time and handle a tenfold increase in users. ZentixSoft builds React Native applications together with backend development and cloud infrastructure solutions, with scalability built in from day one. Our services extend beyond launch: we continue supporting the product after launch, making sure every update improves it and giving your business a long-term technology partner rather than a contractor for a single project. With React Native, one codebase serves both iOS and Android with native-like performance and faster time-to-market. It pays off when you need the same features on both platforms, frequent releases, and a team that can scale with your product. For graphics-intensive apps, AR, or VR, native development is the better investment, and we’ll tell you that upfront.
Fast Team Start
A senior React Native development team starts within 5 days, and the first version of your app reaches the app stores within 90 days.
Honest Technology Choice
We work with React Native, Flutter, and native development, so we recommend the technology that best suits your product.
One Team, Screen to Cloud
React Native mobile development, backend, and DevOps are handled by one team, ensuring clear responsibility for the architecture of the entire system.
What’s Holding Your Mobile
App Back, and How We Fix It
We’ve solved these challenges many times, so we address them before they become costly mistakes.
Challenge
Your previous contractor missed deadlines, left unfinished code, and disappeared.
Risk
More months and money wasted, with the product still not on the market.
Solution
Transparent sprints, weekly demos, response SLAs, and full repository access from day one.
Challenge
Estimates keep growing, and you can’t tell investors when you’ll launch.
Risk
A missed launch date, depleted runway, and lost investor confidence.
Solution
Scope, timeline, and budget are fixed before we start, and every change is approved with its impact.
Challenge
A competitor has launched, and you still have no mobile team.
Risk
Early movers capture the market, while months spent hiring translate into lost revenue.
Solution
A senior React Native team joins within days, so you skip months of hiring.
Challenge
Your app is slow, crashes, and collects one-star reviews.
Risk
Poor ratings discourage new users, increase acquisition costs, and reduce retention.
Solution
Every release meets agreed performance criteria, and crashes are fixed before they reach reviews.
Challenge
You’re unsure React Native is right and fear a rewrite in a year.
Risk
An expensive product rebuild just as the business starts growing.
Solution
We assess your product first and recommend the stack that fits your roadmap.
Challenge
Your app, backend, and infrastructure can’t keep up with growth.
Risk
Failures during peak traffic, precisely when the largest number of users are accessing your product.
Solution
One team owns the app, APIs, cloud, and CI/CD, designed for 10x your current load.
0106
Our Custom React Native
Mobile Application
Development Services
Our custom React Native application development services cover the entire lifecycle or individual stages, from consulting and MVP development to migration, design, testing, and post-launch support.
01
React Native Consulting and Code Audit
Technology decisions made with your product’s growth in mind:
React Native, Flutter, or native: what fits your product;
code, architecture, and performance audit;
optimization plan prioritized by business impact;
architecture and roadmap for your growth plans.
02
Custom React Native App Development
03
MVP and Proof of Concept
04
Migration to React Native
05
UI/UX Design for iOS and Android
06
QA, Store Releases and Support
Not Sure If React Native Is Right for Your App?
Get a free consultation with a senior React Native engineer: we’ll review your requirements, flag risks, and outline a scalable architecture.
What We Build With React Native
A natural fit
Marketplaces, FinTech and banking apps, eCommerce, booking, social and content apps, and mobile companions to SaaS and enterprise platforms.
A fit with native modules
Apps working with Bluetooth devices, background location, video calls, or platform-specific payment SDKs.
Better built natively
3D games, AR and VR experiences, and apps that process audio, video, or sensor data in real time.
React Native vs Flutter
vs Native: What Fits Your App
We work with all three development approaches, so we recommend the technology best suited to your app roadmap, even when React Native isn't the right choice.
Criterion
React Native
Flutter
Native
Codebase
One
One
Two
Programming language
JavaScript / TypeScript
Dart
Swift, Kotlin
User interface
Native components
Custom rendering engine
Native components
Performance
High, depending on the workload
High, depending on the workload
Greatest control over optimization
Time to market
Fast
Fast
Generally slower
Team specialization
React Native + native expertise when needed
Flutter + native expertise when needed
iOS and Android
Latest OS features
Through libraries or native modules
Through plugins or platform-specific code
Directly through OS SDKs
Code sharing with React web apps
Partial
No
No
Over-the-air (OTA) updates
JavaScript and assets via an OTA service
Through third-party services
No
Best suited for
MVPs, SaaS, FinTech, eCommerce
Custom UIs with complex animations
Graphics-intensive apps, AR/VR, real-time processing
Key considerations
Library and native module compatibility
Availability of required plugins
Keeping features consistent across both platform versions
Performance and Stability Metrics
Before and After Release
Every release is tested against agreed performance and stability criteria and monitored after launch. Here’s what we measure and why it matters for your business.
Smooth 60 FPS
Lists, scrolling, and animations target 60 FPS on agreed devices for a truly native feel.
99.5%+ Crash-Free Sessions
Real-time crash monitoring keeps stability above 99.5% and protects your store ratings.
ANR Below Google Play Limits
Freeze rates stay below Google Play thresholds, so the store doesn’t limit your app’s visibility.
Controlled App Size
Download size stays within the agreed budget for faster installs and fewer uninstalls.
Memory Under Control
Memory usage stays within agreed limits to prevent crashes on low-end devices.
React Native Architecture Built to Scale
We design scalable app architecture that accommodates growing user numbers, expanding development teams, and new features without extensive rework.
New Architecture by Default
We use Fabric, TurboModules, and the Hermes engine, testing app startup speed and UI smoothness on target devices.
Modular Codebase
TypeScript modules in a monorepo, with business logic shared between your mobile app and React web app when needed.
Security by Design
Secure data storage, certificate pinning, and OWASP MASVS security checks are built in from the very first sprint.
Automated Delivery and Monitoring
GitHub Actions, EAS Build, and Fastlane automate every release, while Sentry and Crashlytics catch crashes after launch.
Engagement Models
That Adapt to Your App
Choose a collaboration model that fits your project needs and budget, with the flexibility to adjust it as your app grows.
Fixed-Scope Project
For MVPs, PoCs, and first releases: scope, timeline, and budget are agreed upfront, and you get exactly what was planned.
Dedicated React Native Team
A full team of developers, QA, a designer, and a PM works only on your app, perfect for long-term growth without an in-house mobile team.
Team Extension
Senior developers join your workflows and tools to close expertise gaps and speed up your roadmap as part of your team.
React Native App Development Cost: Where Your Budget Works Harder
Cost depends on features, integrations, and security requirements, and you get a stage-by-stage estimate after Discovery. Here’s how your budget works harder:
One Codebase, Two Platforms
One team builds and maintains both iOS and Android, so you never pay for the same feature twice.
Faster With Our Accelerators
Proprietary frameworks and ready-made modules cut development time by up to 30%.
Pay for What You Need
No hiring or team management on your side, and the team adapts as your roadmap evolves.
Lower Cost of Ownership
Modular architecture keeps the app easy to extend, while OTA updates deliver fixes and changes without a new app store release.
Get a Scoped Estimate
Share your requirements and get a cost and timeline estimate for your first release.
Industries We Serve with React Native App Development Solutions
We tailor each app to the industry’s security requirements, integration needs, and user workflows, ensuring development addresses real business challenges from the very first release.
FinTech
Mobile banking, payment, and investment apps with biometric login and secure transactions, built to pass compliance reviews and protect users’ financial data.
Healthcare
Telemedicine, appointment booking, and patient apps with secure data exchange, so patients get care faster and clinics reduce staff workload.
MedTech
Apps for medical devices and wearables with Bluetooth data transfer, giving healthcare professionals real-time access to patient readings.
Insurance
Policy purchase and claims with photos and documents right in the app, speeding up processing and helping insurers retain customers.
Retail
Shopping apps, loyalty programs, and personalized offers synced with your eCommerce platform to drive repeat purchases and higher order value.
Logistics & Transportation
Driver and courier apps with GPS tracking, cargo scanning, and offline mode, so every delivery stays visible and no data is lost.
Advantages
Why Companies Choose Us for Custom React Native App Development Services
Most React Native app development companies are either niche studios that skip the backend or agencies where mobile is a side service. ZentixSoft combines deep React Native expertise with a team that owns backend, cloud, and DevOps.
00
01
02
03
04
We Rescue Stalled Projects
We take over apps from previous contractors, audit them within two weeks, and get your releases back on track.
Engineers Who Estimate, Build
Estimates come from the engineers who will build your app, so promises match reality.
You Own Everything
Code, documentation, repositories, and app store accounts belong to you under the contract, so any team can take over the project.
We Challenge Your Backlog
We question features that won’t move your metrics and suggest a shorter path to results.
Reports in Business Metrics
Reports show progress on stability, release frequency, ratings, and retention, not just hours.
How We Take Your App From Idea to the Stores
Every development project phase has a clear deadline and defined deliverables, so you always know what to expect and when.
01
Discovery
Define business goals, the scope of the first release, budget, and performance metrics that must be met before launch.
02
UX/UI and Architecture
Design user interfaces and an interactive prototype while planning the architecture around your app roadmap.
03
Development in Sprints
Build your app in two-week sprints, with demos of working functionality so you can track progress and adjust priorities.
04
QA and Performance Check
Test on real devices and verify each build against the agreed performance and stability criteria.
05
Store Release
Prepare your app for publication in line with App Store and Google Play requirements and support it through the release process.
06
Growth and Support
Monitor post-launch metrics, introduce new features, and keep your app compatible with the latest OS versions.
Our team
The React Native Team
Behind Your Mobile App
A coordinated team of senior specialists, from software architects to QA engineers, handles the full development lifecycle, so you don’t have to manage multiple contractors.
CEOAgness
CTOAndrew
HRDYevhenii
Project ManagerOlha
Full Stack DeveloperDmytro
Full Stack DeveloperMarko
Team LeadYehor
Content LeadMaksim
BDMPavlo
Project ManagerOlga
Full Stack DeveloperYurii
Full Stack DeveloperVitalii
Project ManagerYuliia
Team Lead | DevOpsOleg
Backend DeveloperMaks
Team Lead | DevOpsOleg
QA EngineerElina
Full Stack DeveloperOleksandr
RecruiterOksana
CSOOlga
CMOSolomiya
Project ManagerYeva
Full Stack DeveloperAnastasiia
Tender ManagerYurii
Head of DeliveryKristina
UI/UX DesignerVladyslav
Business AnalystOlena
Our Technology Stack
for React Native Development
We use proven technologies and tools to build fast, secure apps that can handle high traffic and growing demand.
Core
React Native
TypeScript
Expo
Hermes
UI and Navigation
React Native Reanimated
NativeWind
Expo Router
State and Data
Redux Toolkit
Zustand
TanStack Query
Backend and APIs
Node.js
GraphQL
REST API
Firebase
Cloud and CI/CD
AWS
Kubernetes
GitHub Actions
EAS Build
Fastlane
Testing
Jest
React Native Testing Library
Detox
Monitoring
Sentry
Crashlytics
Trusted by Companies Building With React Native
What Our Clients Say
About Working with Us
Behind every review is a successful partnership: an app that has launched, grown, and continues to evolve with our team.
They adapted quickly to changing priorities
The team quickly understood our goals and translated them into practical solutions. Their ability to adapt and move fast made the collaboration smooth and highly productive.
Joseph F.
Ozeaon | Portugal
Joseph F.
Ozeaon | Portugal
Their e-commerce expertise made a real difference
Zentix helped us build and launch our e-commerce platform with great attention to detail. The team was responsive, professional, and easy to work with throughout the entire process.
Amir B.
Servicom | Sweden
Amir B.
Servicom | Sweden
Zentix Soft built a tool for how a staffing agency actually operates, not a generic tool adapted to fit
Zentix Soft's work helped the client reduce their time-to-placement and administrative overhead. The team delivered on schedule, communicated clearly, and was responsive to the client's needs. Moreover, Zentix Soft's ability to build a system custom to the client's specific workflow stood out.
Max B.
COO, Zero Task Labs
Responsiveness and dedication
Responsiveness and dedication to delivering high-quality services were outstanding.
Maria А.
ARGUNOVA | Ukraine
Maria А.
ARGUNOVA | Ukraine
Worked in sprints
Zentix delivered their development work on time, which was an excellent start for the client. The team worked in sprints, updated the client weekly, and delivered tasks on schedule.
Andrew R.
RaDevs | Estonia
Andrew R.
RaDevs | Estonia
The team delivered exactly what we needed
The team delivered exactly what we needed — high-quality solutions and smooth collaboration from start to finish.
Alex L.
Wavory | Cyprus
Alex L.
Wavory | Cyprus
When you find a team that gets your business, you keep them close
Zentix Soft's work helped the client increase sales, conversions, and inquiries. The team was responsive, attentive, and communicative throughout the engagement. Moreover, Zentix Soft understood the client's business and delivered a warm and beautiful design that aligned with their vision.
Andrii K.
CEO, Happy Paws LLC
They delivered great results and provided useful support throughout the project
Zentix's work met the client's expectations. The team provided timely deliverables and professional responses throughout the engagement. Their daily online meeting, constant updates on the project's progress, and excellent results were remarkable. Zentix approached tasks promptly and creatively.
Andrey H.
Bestclevers | UK
Andrey H.
Bestclevers | UK
0108
Ready to Launch a React Native App Built to Scale?
Tell us about your app, and our software architect will recommend a tech stack, development plan, and estimate for the first version.
FAQ
Yes. Since the New Architecture became the default, React Native apps start faster and run more smoothly, and companies like Meta, Microsoft, and Shopify use it in their products.
In 2018, Airbnb was embedding React Native into a large existing native app with separate iOS and Android teams, so maintaining three stacks at once became too costly. Products built from scratch or fully migrated to React Native don’t face this problem.
Yes, as long as the architecture is designed for growth from day one. For graphics-intensive apps, AR, or VR, we’ll recommend native development instead.
For most business apps, users won’t notice a difference. Resource-intensive tasks run in native modules written in Swift and Kotlin.
An MVP is typically ready for app store submission within 90 days. A full-featured product usually takes 4–6 months, and you get an exact plan after Discovery.
The cost depends on features, integrations, and security requirements. An MVP typically costs 15,000–50,000, and for larger products you get a detailed estimate after Discovery.
We monitor stability and performance, ship updates and new features, and keep the app compatible with new iOS, Android, and React Native versions. Support continues under any engagement model.
Both are mature. React Native suits products with a React web app or a need for over-the-air updates, while Flutter suits custom, pixel-perfect UIs with complex animations.
We start most new projects with Expo: it speeds up setup and includes EAS Build and OTA updates. Expo supports custom native code, so a bare setup is needed only in rare cases, such as embedding React Native into a large native app.
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