Mobile App Development for iOS and Android
Native and cross-platform mobile apps that handle real business operations. Built to perform. Built to last.
iOS and Android development · Cross-platform · Enterprise mobile · India · Ireland · USA
Your Users Are on Their Phones. Your App Should Be Ready for Them.
Most businesses do not have a mobile problem. They have an expectations problem. Users expect apps that are fast, reliable and functional even without a signal. They expect their data to be there when they need it. They expect an experience that feels built for them, not bolted onto a website.
We build iOS and Android apps that meet those expectations. Native where performance demands it. Cross-platform where speed and budget make sense. Always built around what your users actually need to do. From consumer-facing products to internal operational tools, we ship apps that work in the real world.
Combined Engineering Experience
India · Ireland · Europe · USA
Uptime Delivered
Live on App Store and Play Store
What We Build for You
Each capability listed here is something we actively deliver across industries and geographies. No filler.
How We Build Mobile Apps
Whether we are building a consumer ordering app or an enterprise workforce tool, the process is the same. What changes is what we learn in the first phase and how that shapes everything that follows
Map Operations
Before a line of code is written, we map how the app needs to behave in practice. Who uses it, on what device, in what environment and with what constraints. A field operator checking in on-site has different needs to a parent ordering lunch for their child. We design around the reality, not a generic persona.
Build Systems
Platform choice, offline strategy, data sync, authentication and backend architecture are decided during scoping. We do not discover these mid-build. Development, design and testing run in parallel so every sprint produces something reviewable.
Run and Optimise
We manage App Store and Google Play submissions, handle compliance updates and keep improving the product after launch. Our client relationships average seven-plus years. The apps we shipped in year one are still being improved today.
Built With Tools Your App Will Still Depend On in Five Years
These are not the frameworks we are experimenting with. They are the ones we have shipped production mobile apps on across multiple industries and geographies.
iOSNative performance, full Apple ecosystem integration, smooth App Store delivery
- Swift
- SwiftUI
- UIKit
- Core Data
- TestFlight
AndroidApps that work across the full range of Android devices from day one
- Kotlin
- Jetpack Compose
- Jetpack Libraries
- Android Studio
Cross-PlatformShared business logic across iOS and Android with native UI on each platform
- Flutter (Dart)
- KMM
- KMP
Backend and APIsServer logic that handles real operational complexity and third-party connections
- Node.js
- Python
- RESTful APIs
- GraphQL
- WebSocket
Push and SyncReliable notifications and real-time data sync across devices and platforms
- Firebase
- APNs
- FCM
- AWS Amplify
- Google Cloud
App Store DeliveryFrom TestFlight to public release, store assets, compliance and CI/CD handled
- iOS App Store
- Google Play Store
- TestFlight
- CI/CD pipelines
Infrastructure, security and deployment are handled through our Cloud and DevOps and Quality Engineering practices.
We Did Not Just Build an App. We Shipped One.
- Collatzinc Internal Product
- Productivity
- KMM
- iOS
- Android
Zysh - From Internal Problem to Live Product
We built Zysh because we needed it ourselves. A productivity app that had to work across iOS and Android, stay fully functional offline and sync reliably across devices without losing data. No off-the-shelf tool did what we needed, so we built it.
We built it on Kotlin Multiplatform Mobile with a shared Kotlin backend, Jetpack Compose on Android and SwiftUI on iOS. One codebase for the logic. Native UI on each platform.
- Kotlin Multiplatform : Shared backend, native UI per platform
- Offline-First : Full functionality without connectivity
- Google Drive Sync : Seamless across all devices
- Dark Mode : Full theme with colour-coded organisation
Building Zysh forced us to solve the hard problems. Reliable offline sync, cross-platform performance and notification delivery across devices.
Every client mobile project we take on now benefits from what we learned shipping our own product.
Collatzinc Engineering Team
