Web app development that loads fast and converts 187% better.

Web app development is the design and engineering of software that runs in a browser — SaaS platforms, customer portals, dashboards and internal tools — rather than a static website. A custom web application handles logins, data, payments and real-time interaction. We build them to load in under 2.5 seconds and convert 187% better than the slow, generic builds they replace.

Whitehat's custom app development is scoped from a lean MVP and scales with features, integrations and user volume. There's no flat rate, because cost depends on scope. Our free build audit gives you a fixed-scope quote and a realistic timeline up front — most MVPs ship inside 8–12 weeks, so you see the investment before committing.

Choose an app development agency with senior in-house designers and engineers — not offshore hand-offs — and ask to see live applications they've shipped and their load times. Look for fixed-scope quotes, fortnightly demos and ownership of the code. We've built web applications for Australian businesses for 13 years and engineer every one to load in under 2.5 seconds.

A lean MVP from our web application development team usually ships in 8–12 weeks; larger platforms run in fortnightly sprints over 4–6 months. We start with the highest-value features so you have something real in users' hands fast, then iterate. Every sprint ends in a working demo, so progress is visible, not a promise.

We build on a modern, proven stack: React and Next.js on the front end, Supabase or Node on the back end, hosted on AWS in Sydney for data residency. The same architecture powers our own platforms. It's fast, type-safe and scalable — which is how we hit sub-2.5-second loads and +187% conversion across rebuilt apps.

Yes — rescuing slow, fragile or half-finished applications is common work for us. We audit the codebase, stabilise what's breaking and re-architect the weak points, often migrating to a faster stack incrementally so the business keeps running. Rebuilt apps routinely move from multi-second loads to under 2.5 seconds and lift conversion 187% on average.

Yes. We build installable progressive web apps and cross-platform mobile apps that share one codebase across web, iOS and Android. That means one team and one budget instead of three separate builds. We recommend the right approach in your free audit based on your users, budget and the device behaviour we expect.

Yes — you own 100% of the code, the design files and the infrastructure. Everything ships into your own repositories and cloud accounts, with documentation and handover, so you're never locked to us. Around 13 years of building for Australian businesses has taught us that ownership and transparency are why clients stay by choice, not contract.

Yes. We deliver web app development services to businesses Australia-wide — Sydney, Melbourne, Brisbane, Perth and beyond — working remotely the same senior, in-house way we'd work in person. There are no offshore hand-offs and no time-zone gaps: one product, design and engineering team owns delivery end to end, shipping apps that load in under 2.5 seconds and convert 187% better on average.