An App Your Users Open Every Day, Not Just Once.
We engineer cross-platform mobile applications that perform like native, smooth, reliable, and designed around the user habits that drive daily engagement.
The problem
Most Apps Lose Users in the First Week
Your mobile app is often the first and most personal touchpoint your users have with your product. A laggy, unreliable app doesn't just frustrate users, it kills retention before you even get a chance to prove the product's value.
We build mobile apps for startups, scaleups, and enterprises across the US, UK, and Australia who need a product that earns daily-active users, not just downloads.
Performance target
Response time, Mon-Fri
Systems shipped to production
Capabilities
Mobile Products Across Every Category
Consumer Apps
Retention-focused apps built around habit loops and smooth UX
Business & Enterprise Apps
Internal tools and field apps with role-based access and offline support
Offline-First Apps
Full functionality without internet, syncs automatically when reconnected
Real-Time Features
Live chat, notifications, feeds, and collaborative tools
App Store Strategy
ASO, submission, and launch support for both iOS and Android
Native Integrations
Camera, GPS, biometrics, Bluetooth, payments, and more
Our approach
Performance Is Not Optional
We build with React Native, giving you a single codebase that runs on both iOS and Android without sacrificing the performance or feel of a native app. Our apps ship at 60fps, handle background sync gracefully, and are tested on real devices before they reach your users.
Offline-first architecture is a default for us, not an add-on, because real users use apps in the real world, and the real world doesn't always have signal.
What that looks like in practice
Built for the Real World, Not Just the Demo
Tested on real devices
Every build is tested on real iOS and Android hardware before it reaches your users, not just a simulator.
Graceful offline sync
Background sync handles reconnection automatically, so users never lose data working offline.
One codebase, two stores
A single React Native codebase ships to both the App Store and Play Store without doubling engineering cost.
Read more
Guides on Mobile Apps
How Much Does It Cost to Build an App in the UK
Real GBP cost ranges for building a mobile app in the UK, what actually drives the price, MVP versus full build, platform choice, and ongoing costs after launch.
Mobile App Development in the UK: The Complete Guide
Native vs cross-platform, the real development process, what it costs, App Store realities, and how to choose a partner who won't disappear after launch.
React Native vs Flutter: Which to Choose in 2026
A genuinely balanced 2026 comparison of React Native and Flutter on performance, ecosystem, hiring, and cost, plus where each one actually wins.
Why Devity
Your Mobile Partner From Concept to App Store
Single codebase, two platforms, iOS and Android without doubling the cost
Offline-first by default, reliable in any connectivity condition
60fps performance target, smooth interactions, every time
App Store submission support, we handle the process end to end
Post-launch iteration, updates, performance monitoring, and feature releases
GDPR-aligned
User data is handled under strict confidentiality and GDPR-aligned practices for UK and EU clients.
Timezone overlap
Remote-first, with working hours that overlap the UK and Australian business day.
24h response
Every enquiry gets a reply within 24 hours, Monday through Friday.
FAQ
Questions, Answered.
Do you build native apps, or only React Native?
We build with React Native by default, giving you a single codebase for both iOS and Android without sacrificing native performance or feel. We can discuss fully native builds for projects with specific requirements that call for it.
How do you handle App Store and Play Store submission?
We handle submission end to end for both platforms, including App Store Optimization, store listing assets, and the review process.
Will the app work without an internet connection?
Offline-first is our default approach, not an add-on. The app stays functional without signal and syncs automatically once connectivity returns.
What happens after the app is live in the stores?
We offer post-launch iteration, updates, performance monitoring, and new feature releases, so the app keeps improving after launch, not just at it.