Applications Syntax is a solo application development studio, building end-to-end apps and software with SwiftUI, Next.js and Supabase. Design, frontend, backend and launch are all handled in-house.
CarEnthu
Idle Squishy
SoberMate
Lash Cartel
Squishy Drop
Rose Peinture
GoonSync
Veer
FoundUps
ScholarScout
Gruxey
LumixAV
StackD
Not mockups, not prototypes. These are live products I designed, built, and launched solo: real backends, real payments, real App Store releases.
A car-spotting collection app: photograph rare cars in the wild, identify them with on-device Vision, and build a collection across 500+ models and 5 rarity tiers. Maps, a social feed and badges. Designed, built, and shipped end-to-end.
cartenthu.com ↗
A polished kawaii idle game built in pure SwiftUI. 25 squishies, 33 skins, daily rewards, a spin wheel, prestige, achievements, offline earnings, synthesized audio and true multi-touch tapping. Live on the App Store and playable free in the browser.
App Store ↗
An e-commerce storefront for a cosmetics business in Bankstown, NSW. Full brand treatment, product pages, and Stripe Checkout. Designed and built to brief, shipped live, and selling.
lashcartelcosmetics.com ↗Tell me what you're making and where it's at. I'll come back with how I'd approach it, usually within 24 hours.
AI scholarship matching · Next.js + Supabase
Founder ↔ investor matching, realtime chat · SwiftUI
AV hire business site & rental shop
Physics merge puzzle · Matter.js + Canvas
32-player realtime multiplayer, shipped & retired
Client e-commerce storefront · Next.js
Map-first carpool matching · SwiftUI + MapKit
Privacy-first sobriety tracker · live on the App Store
Cozy watercolour app · SwiftUI + PencilKit
AI payslip analyzer, the first product I shipped
Some of it ends as an object on the bench: modelled in CAD, printed, wired and soldered by hand, with the firmware written against the hardware sitting in front of me.
A voice-controlled robotic arm for a workbench. It holds a conversation without you picking up a phone, extracts fumes at the work, and plays audio through an open speaker so you keep your hearing on the room. Modelled, printed, wired and programmed end to end.
Read the full build →Clear, low-drama, and built around you always knowing where things stand. No surprise invoices, no silence for weeks.
We talk through what you're building, who it's for, and what success looks like. Free, no obligation.
I turn it into a clear scope with milestones and a fixed quote. You know exactly what you're getting, and what it costs, before anything starts.
I build in focused milestones with a weekly update, so you see progress instead of silence. Feedback loops are fast.
I deploy, submit to the App Store or launch the site, and hand over everything: code, access, and docs. It's yours.
I'm Harrison White, the founder of Applications Syntax. I'm a self-taught developer from New South Wales, Australia, and I've spent the last couple of years doing one thing obsessively: shipping real products.
My path here was backwards. I started building games on Scratch as a kid, moved to Unity, then taught myself HTML/CSS/JS because I wanted a website, then web apps, then native iOS with Swift, because I wanted my ideas on a real phone and couldn't afford to pay anyone to build them. So I learned every layer myself.
That's the whole pitch, really. I'm not a designer who outsources the code, or an engineer who hands off the backend. I do all of it: design, SwiftUI, Next.js, databases, App Store submissions, the 2am "why won't this deploy" debugging. Being genuinely full-stack and solo means there's no handoff and no telephone game. You talk to the person building the thing.
I've shipped products live to the App Store, built real-time multiplayer systems, and run production backends. Now I bring that to client work: if you've got an idea and need someone who can take it all the way from a blank project to something live, that's exactly what I do.
The way I work is simple: ship fast, communicate clearly, work on the whole build, and take responsibility for it.