ServicesMobile app development

Android App Development Sydney

Sentia has been doing Android application development in Sydney since 2006. We build native Kotlin apps for phones and tablets and the platform behind them, and the apps we've built have more than 5 million downloads.

Tell us about your project

Android app development in Sydney, built for every device.

Built for thousands of devices.

Android runs on phones and tablets of every size, brand and OS version. We design and test for the devices your users actually carry, not just the latest flagship.

Google Play, handled.

Play Store review, policy changes and Google's yearly Android requirements catch a lot of apps out. We build to them from day one and manage every release for you.

Native when it matters.

We build natively in Kotlin where performance and device features matter. If React Native suits your app better, or you need iOS too, we'll give you a straight recommendation.

What we build

Android mobile app development for phones and tablets.

Android apps built for real use, at scale.

Rydo

Android apps built for real use, at scale.

Apps for large audiences need to be fast, reliable and easy to use on any phone. We build native Android apps in Kotlin with real-time features, push notifications and performance monitoring, and handle Google Play releases end to end.

See our work
Native Kotlin

Built in Kotlin for the speed and feel Android users expect, on whatever phone they carry.

Real-time features

Notifications, live updates and feeds that keep users engaged.

Offline-capable

Apps that keep working when the connection drops.

Google Play releases

We handle submission, review management and release cycles on Google Play.

Android phone and tablet apps for teams doing a job.

Eclipx Car Inspections — field inspector view.

Android phone and tablet apps for teams doing a job.

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, camera capture and real-time dispatch built in.

See our work
Phones and tablets

One app for Android phones and tablets, with tablet-optimised layouts where they help.

Offline-first

Works without signal and syncs automatically when the connection returns.

Capture

Camera, barcode scanning and document capture for field tasks.

Real-time dispatch

Jobs assigned and status updated as things happen.

Android apps that work with physical hardware.

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

Android apps that work with physical hardware.

Connect Android phones and tablets to beacons, scanners, sensors and devices. We integrate Bluetooth and BLE, barcode and QR scanning, GPS and IoT hardware, built to work reliably in field conditions.

See our work
Bluetooth and BLE

Sensors, proximity detection and asset tracking via Bluetooth Low Energy.

Barcode and QR scanning

Fast, accurate scanning with the phone's camera, no extra hardware needed.

Location and maps

GPS, maps and live tracking, from turn-by-turn routing to ride tracking.

Connected hardware

Control and monitor door locks, printers, sensors and IoT equipment.

The Android app and the platform behind it.

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

The Android app and the platform behind it.

An Android app is usually the front of something bigger, such as bookings, payments or a fleet operation. We build the app, the back end and the web platform together, so they ship and scale as one product.

See our work
APIs and integrations

Back ends and APIs built alongside the app, connected to the systems you already run. Explore API integration

Web platform

Admin tools and web apps that share business logic with the Android app.

Alongside your iOS app

Add Android to an existing iOS app on the same back end, or build both together. Explore iOS app development

One team

Design, Android, back end and web built together, with no handoffs between teams.

We can help with...
Mobile Phone App DevelopmentAPI & IntegrationsiOS Mobile App DevelopmentReact Native DevelopmentMulti Platform Development
From build to Google Play

From first conversation to Google Play, with Google's rules built in from day one.

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.

Designed for Android.

User flows, wireframes and interface design that follow Android's conventions, so the app feels at home on phones and tablets before it's built.

Tested on real devices.

The app and its back end are built together, tested on a range of real Android devices throughout. You see working software early, not at the end.

Kept current after launch.

We handle Google Play submission and review. After launch we keep the app current with each Android release, through support and maintenance or ongoing development.

Android apps we've built

Airtasker

Airtasker

Marketplace connecting people to complete everyday tasks and services

Industry

On-demand Service, Marketplace

RydoCase study

Rydo

A trusted, real-time rideshare alternative for Australian Taxis

Industry

On-demand Service, Transport & Logistics

EzWake

EzWake

Helping children build confidence and independence through smart sleep technology.

Industry

Health & MedTech

Opel Mobile Guardian

Opel Mobile Guardian

Smart Safety and Family Connectivity

Industry

Retail & eCommerce

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. We build natively in Kotlin where performance and device features matter, and in React Native where one codebase for Android and iOS makes more sense. Still weighing up platforms? Start with our mobile app development overview.

We manage Google Play submission and review for you. If Google raises an issue, we fix it and resubmit, and we build to Google's policies from the start so there are fewer surprises.

Yes. We build native iOS apps in Swift, often on the same back end as the Android app. See iOS app development.

Yes. We start with a review of the code and architecture, then fix what's urgent and plan the rest. Read more about project rescue.

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 Android app developer in Sydney or near you, Sentia has been building apps here since 2006 for clients across Australia, including Airtasker's Android app. Our Zagreb team adds delivery capacity.