Web & Mobile App Development
Responsive web applications and native mobile experiences that work beautifully across every device. We build for iOS, Android, and the web, single codebase or native where it counts.
Overview
Your customers move between phone, tablet and desktop without thinking about it, your product should too. We build performant, accessible web apps and mobile experiences that feel native everywhere, with shared codebases where it saves you money and platform-native code where the experience demands it.
What you get
- One polished experience across web, iOS and Android
- Native-feeling performance and gestures, not a wrapped website
- Shared codebases that cut build and maintenance costs
- Accessible, responsive interfaces that pass real-world testing
Everything in the engagement
React & Next.js progressive web applications
React Native & Flutter cross-platform apps
Native iOS (Swift) & Android (Kotlin) where needed
Offline-first & push-notification support
App Store & Play Store submission and release
Responsive, accessible UI implementation
A clear path from idea to launch
Discover
We dig into your goals, users and constraints to define exactly what success looks like before a line of code is written.
Design
We map flows and design the experience, validating direction with prototypes so there are no surprises later.
Build
We ship in two-week sprints, so you see working software early and steer the build as it takes shape.
Launch & Scale
We deploy, monitor and harden for production, then keep improving as real usage and feedback roll in.
Tools & technology
Common questions
It depends on your goals. Cross-platform (React Native / Flutter) ships faster and costs less to maintain for most apps. Native makes sense when you need cutting-edge platform features or maximum performance. We'll recommend honestly based on your needs.
Yes! Interstellr manages the full release process, including store listings, review compliance, and ongoing updates, so your app gets approved without the usual back-and-forth.
Absolutely. We frequently take over and modernise existing apps - improving performance, refreshing the UI, and untangling technical debt so the product can move forward again.