Services

App Developers in Sydney

Sentia is a mobile app development company in Sydney. Since 2006, our app developers and designers have built iOS, Android and cross-platform apps and the platforms behind them, with more than 5 million app downloads.

Tell us about your project

App developers in Sydney who build the app and everything behind it.

The app is the easy part.

Most mobile apps sit in front of something complex: a dispatch system, a claims workflow, a fleet operation. We build the whole thing, not just the screen.

We'll tell you which platform makes sense.

iOS, Android or React Native depends on what the app needs to do and who it's for. You'll get a straight recommendation, not the one that's easiest for us to build.

You always know where your budget is going.

We scope carefully, communicate when things change, and won't build things you don't need. Honest updates on progress and cost throughout.

What we build

What our mobile app developers build.

Web, mobile, and tablet — built as one product.

Smartspace (web + mobile — smart building access and management)

Web, mobile, and tablet — built as one product.

Most mobile apps are part of a larger product. We build the web platform, iOS app, Android app, and iPad app together, with shared business logic and a consistent experience across every screen. Native where performance matters, React Native where a single codebase makes more sense.

Explore cross-platform app development
iOS and Android

Built natively in Swift and Kotlin, or React Native for a shared codebase.

iPad and tablet

Tablet-optimised layouts for field, clinical, and enterprise use.

APIs and integrations

Business logic and APIs shared across web and mobile. Explore API integration

One team

Web and mobile built together — no handoff problems between separate teams.

Consumer apps built for scale from day one.

Rydo

Consumer apps built for scale from day one.

Apps for large audiences need to be fast, reliable, and easy to use under pressure. We build consumer mobile apps with real-time features, push notifications, performance monitoring, and App Store and Play Store submission handled end to end.

See our work
Real-time features

Notifications, live updates, and feeds that keep users engaged.

Performance at scale

Architecture that handles growth without rewrites.

App Store and Play Store

We handle submission, review management, and release cycles.

Offline-capable

Apps that keep working when the connection drops.

Apps built for people doing a job in the real world.

Eclipx Car Inspections — field inspector view.

Apps built for people doing a job in the real world.

Apps for drivers, inspectors, field teams, and clinicians work differently from consumer apps. We build for patchy connectivity, one hand occupied, and time pressure, with offline-first architecture, GPS routing, camera capture, and real-time dispatch built in.

See our work
Offline-first

Works without signal and syncs automatically when connection returns.

GPS and routing

Location tracking, maps, and turn-by-turn routing built in.

Capture

Camera, barcode scanning, and document capture for field tasks.

Real-time dispatch

Jobs assigned and status updated as things happen.

Hardware integrations built into the app.

Smart building desk booking, connected to access control and beacon location.

Hardware integrations built into the app.

Connect mobile apps to physical hardware — beacons, scanners, sensors, and devices. We integrate Bluetooth and BLE for proximity and asset tracking, barcode and QR scanning, GPS devices, and IoT hardware, built to work reliably in field conditions.

See our work
Bluetooth and BLE

Proximity detection and asset tracking via Bluetooth Low Energy.

Barcode and QR scanning

Fast, accurate scanning built into the app without third-party hardware.

GPS and location hardware

Integration with external GPS devices and location services.

Connected hardware

Control and monitor physical devices including door locks, printers, sensors, and IoT equipment.

We can help with...
API & IntegrationsAndroid App DevelopmentiOS Mobile App DevelopmentReact Native DevelopmentMulti Platform Development

iPhone, Android, iPad and cross-platform apps.

iPhone and iOS apps.

Native iPhone apps built in Swift, designed for how people use their phones, with App Store submission, review management and release cycles handled for you.

Explore iOS app development

Android apps.

Native Android apps built in Kotlin, from MVP to enterprise scale. We handle Play Store submission and keep the app current as Android and its devices change.

Explore Android app development

Cross-platform apps.

One React Native codebase for iOS and Android, when a shared codebase makes more sense than two native apps. We'll tell you straight which one your app needs.

Explore cross-platform app development

iPad and tablet apps.

Tablet-optimised layouts for field, clinical and enterprise use. A standalone iPad app, or one app built for both iPad and iPhone with a single codebase.

How we build your app

From first conversation to the App Store, with the app and the platform behind it built together.

Scope before screens.

We work out what the app needs to do, who it's for and what has to sit behind it, and agree the requirements, a roadmap and a detailed estimate.

See it before it's built.

User flows, wireframes and interface design show you the app before development starts. The architecture is planned alongside, so the app and its platform fit.

Built and tested together.

The app and its back end are built side by side, with testing throughout so what reaches your users is stable. You see working software early, not at the end.

Launched and looked after.

We handle App Store and Google Play submission. After launch you can move into support and maintenance, which we manage, or keep developing the next version.

Apps we've built

Airtasker

Airtasker

Marketplace connecting people to complete everyday tasks and services

Industry

On-demand Service, Marketplace

Opel Mobile Guardian

Opel Mobile Guardian

Smart Safety and Family Connectivity

Industry

Retail & eCommerce

Eclipx Car Inspections

Eclipx Car Inspections

Streamlining full lease return journey — from booking to inspection to final vehicle handover

Industry

Transport & Logistics

Smart Space

Smart Space

Advanced workplace management with multi-platform solutions

Industry

Real Estate

View all mobile projects

Common questions

Every project is different. Send us your brief and we'll give you a detailed estimate, free of charge. For typical ranges, read how much it costs to build an app.

It depends on what the app needs to do and what has to sit behind it. Your estimate comes with a timeline, and you'll see working software early rather than all at the end.

It depends on what the app needs to do and who it's for. We build natively in Swift and Kotlin where performance matters, and in React Native where a shared codebase makes more sense. You'll get a straight recommendation.

Yes. Our app designers and developers work as one team, from user flows and wireframes through to the finished interface. See our UI/UX design work.

Yes. Sentia can provide a mutual NDA that protects your IP and ours.

There are two options. You can move into support and maintenance, which we can manage, or keep developing while we support the current version. Here's why ongoing support matters.

Yes. If you're looking for an app developer in Sydney, Sentia has been building apps here since 2006, including Airtasker's first iOS and Android apps. Our Zagreb team adds delivery capacity.