Mobile App Development

iOS & Android Apps Your Users Will Love, Use Daily, and Recommend to Others

We build cross-platform and native mobile apps that combine stunning design with robust backend engineering. Our apps average 4.8 stars on the App Store and Play Store — built to engage users, reduce churn, and grow your business.

4.8★
Avg App Store Rating
8–16 weeks
Timeline
150+
Happy Clients

Everything You Need to Succeed

Cross-platform iOS and Android from a single Flutter or React Native codebase
Native Swift (iOS) and Kotlin (Android) development for maximum performance
Pixel-perfect UI following Apple HIG and Google Material Design 3 guidelines
Offline-first architecture — works without internet connection
Push notifications, in-app messaging, and deep link routing
Biometric authentication (Face ID, Touch ID, fingerprint)
App Store and Google Play submission, ASO, and approval support
Backend REST API development with Node.js or Laravel
Real-time features — chat, live updates, collaborative tools
Analytics and crash reporting with Firebase and Sentry
Flutter React Native Swift (iOS) Kotlin (Android) Firebase Node.js AWS REST APIs
1
Discovery & Planning
2
Design & Strategy
3
Build & Optimise
4
Launch & Support

Ready to Start?

Free consultation, detailed proposal within 24 hours. No commitment required.

Book Free Consultation →
✓ NDA Available ✓ Fixed Price ✓ On-Time Delivery

Why Businesses Trust Zenbyt for Mobile App Development

Cross-Platform Specialists

One codebase, two platforms — 40% faster delivery, lower cost, and near-native performance with Flutter or React Native.

UX-First Design

We design for real user behaviour — lower churn, higher session duration, and better conversion rates from the first version.

60fps Performance

Smooth animations, fast API responses, and optimised memory usage on every device — from iPhone 13 Pro to budget Android handsets.

Security Built In

End-to-end encryption, secure token authentication, GDPR and CCPA compliance, and regular security audits throughout the build.

Data from Day One

Firebase Analytics, Mixpanel, or Amplitude integration so you understand exactly how users move through your app from launch day.

4.8-Star Track Record

Our apps consistently achieve high ratings because we prioritise usability, speed, and bug-free performance over cutting corners.

50+
Apps Launched
On iOS & Android
4.8★
Average Rating
App Store & Play Store
100K+
Downloads
Across our portfolio
40%
Cost Saving
vs native-only builds

Flutter vs React Native — Which Should You Choose?

Flutter (by Google) compiles to native ARM code and gives you near-native performance with pixel-perfect UI control across both platforms. It's our recommendation for most new projects because of its performance, growing ecosystem, and excellent developer experience. Flutter is particularly strong for apps with complex animations, custom UI components, or high-performance requirements.

React Native (by Meta) is ideal when you have an existing JavaScript/React web development team or codebase you want to share logic with. Its larger ecosystem and longer track record make it a safe choice for enterprise projects. The development experience has improved significantly with the New Architecture (JSI/Fabric) in recent versions.

We assess your specific requirements, team capabilities, and long-term roadmap before recommending either. Both can produce excellent apps — the best choice depends on your context.

The App Development Process Explained

Week 1–2: Discovery and Architecture. We deep-dive into your user journeys, technical requirements, third-party integrations, and backend needs. We produce a detailed technical specification that locks scope before development starts.

Week 2–4: Design Sprint. Wireframes, user flow diagrams, and high-fidelity Figma designs are created and iterated on with your feedback. We don't write code until designs are approved — this prevents expensive rework.

Week 4–12: Development Sprints. We use 2-week agile sprints with demo calls at the end of each sprint. You see working software every fortnight, not just at the end of a 3-month blackout period.

Week 12–14: QA and Polish. Dedicated testing phase across real devices (not just simulators), performance profiling, crash testing, and accessibility review.

Week 14–16: Launch. App Store and Play Store submission, ASO copy writing, screenshot design, and approval management.

What Does App Store Optimisation (ASO) Mean?

App Store Optimisation is the equivalent of SEO for app store search results. It covers your app title, subtitle, keyword field, description copy, screenshots, preview videos, and ratings strategy. A well-optimised listing can increase organic downloads by 30–50% compared to an unoptimised one.

As part of every app launch, we write ASO-optimised copy, design App Store screenshots that highlight key features, create a preview video if the app suits it, and set up a review request flow to generate early ratings — all within Apple and Google's guidelines.

Frequently Asked Questions

A simple MVP app with core features typically starts from £8,000–£15,000. A full-featured consumer app with backend, push notifications, and admin panel typically ranges from £20,000–£60,000. We always provide a fixed-price quote after a free discovery session — no surprises.
Apple's review process takes 1–3 days for most apps. Google Play takes 2–7 days. We manage this process for you, including preparing all metadata, screenshots, and privacy policy requirements.
Yes. We conduct a code audit, assess the architecture, and then plan feature additions or a full rebuild depending on the state of the existing code. We work comfortably with codebases built by other teams.
Apps require updates for new iOS and Android OS versions (Apple releases annually, Google more frequently), security patches, and bug fixes from user reports. We offer monthly retainer plans for ongoing maintenance, new feature development, and priority bug fixing.
Yes. We build backend APIs using Node.js or Laravel, hosted on AWS or GCP. The backend handles authentication, data storage, push notifications, and any server-side business logic your app requires.
Yes. We implement offline-first architecture using local storage and background sync — users can continue using core features without an internet connection, and data syncs automatically when connectivity returns.

Ready to Start Your Mobile App Development Project?

Join 150+ businesses worldwide that trust Zenbyt — on time, every time.