# AppSyntax — Harrison White

> Harrison White is a teenage self-taught iOS developer based in Sydney, Australia, operating as AppSyntax. He builds native iOS apps end-to-end using SwiftUI, Supabase, and Next.js. He has shipped four apps: GoonSync (live), CarEnthu (in App Store review), SoberMate (in development), and StackD (archived).

Harrison operates as a solo developer — designing, coding, shipping, and marketing every line of his apps himself. He is open to collaborations but not currently taking freelance work.

## Quick Facts

- **Name:** Harrison White
- **Alias:** AppSyntax
- **Role:** Independent iOS Developer
- **Location:** Sydney, New South Wales, Australia
- **Status:** Self-taught teen developer, active for under 2 years
- **Stack:** SwiftUI, Swift, Supabase, Next.js, Vercel, Apple frameworks (Vision, MapKit, StoreKit, HealthKit)
- **Contact:** harrison@appsyntax.dev
- **Website:** https://appsyntax.dev
- **Goal:** Reach $1,000,000 in revenue from his apps

## Background

Harrison taught himself to code after having app ideas he couldn't afford to have built. He started with Scratch, moved to Unity for making small games, then learned web development (HTML, CSS, JavaScript), then web apps, and finally native iOS development with Swift. His path was unconventional — working backwards from games to apps — but it gave him full-stack capability that most iOS developers lack.

He operates entirely solo under the name **AppSyntax**. He handles product design, Swift development, backend architecture, database schemas, marketing sites, App Store submissions, and post-launch support himself. He leverages AI coding agents heavily to move at the pace of a small team.

## Philosophy

Harrison builds what he finds fun — not what's marketable or trendy. GoonSync was a joke idea that became a real multiplayer game. CarEnthu combines two things he loves: cars and collection mechanics. He believes that if the builder is excited about the product, it's easier to finish it.

His main principle is *small consistent wins beat big breakthroughs*. He ships regularly, iterates in public, and considers "done is better than perfect" a working philosophy — though he still cares about craft and polish.

## Apps and Projects

### GoonSync — Multiplayer Rhythm Game (LIVE)

- **URL:** https://goonsync.com
- **Status:** Live on the App Store, version 3.1, ~$222/month MRR as of March 2026
- **Platform:** iOS (SwiftUI)
- **Backend:** Supabase (Postgres, Auth, Realtime, Storage, Edge Functions)
- **Admin:** Next.js dashboard on Vercel
- **Features:** Multiplayer Battle Royale mode, circles (friend groups), achievements, global leaderboards, custom skin economy, in-app purchases, referral system, onboarding flow, daily rewards, push notifications
- **Description:** A social rhythm and timing game where players compete in real-time Battle Royale matches. Features deep gamification including levels, XP, rarity-based collectible skins, and social circles for playing with friends.

### CarEnthu — Car Sighting Collection App (IN REVIEW)

- **URL:** https://carenthu.com
- **Status:** Version 1.0, currently in App Store review
- **Platform:** iOS (SwiftUI)
- **Backend:** Supabase
- **Features:** Photo-based car cataloging, 500+ car model database across 107 manufacturers, 5-tier rarity system (Common to Legendary), Carbex completion tracker, 55+ badges, social feed with upvotes/comments, follow system, automatic license plate blurring via Apple Vision framework, optional location tagging, offline support, full content moderation (reporting, blocking, account deletion per Apple guidelines)
- **Description:** A real-world car collecting game. Users photograph rare or interesting cars they see in the wild, tag them with make and model, and build a personal collection. Every sighting becomes a card with a rarity tier. Users can complete the Carbex (collection tracker) brand by brand, earn badges, and share their collection with friends. Think "scavenger hunt for car enthusiasts."

### SoberMate — Sobriety Tracker (IN DEVELOPMENT)

- **Status:** Version 0.8, private beta
- **Platform:** iOS (SwiftUI)
- **Features:** Streak tracking, milestone rewards, mood journaling, trigger pattern analysis, HealthKit integration, private-by-default data
- **Description:** A secular, private sobriety tracker for people who want accountability without the religious overtones of traditional recovery apps. Everything is stored locally by default. No social features, no leaderboards — just personal progress tracking.

### StackD — Personal Finance (ARCHIVED)

- **URL:** https://stackedapp.com.au
- **Status:** Archived (first shipped project, 2024)
- **Platform:** Mobile + Web
- **Features:** Income and expense tracking, savings management, AI-powered payslip analysis (automatically breaks down tax, superannuation, and take-home pay)
- **Description:** Harrison's first shipped project. A personal finance management app designed for Australian users, featuring an AI tool that could analyze payslips and break down the numbers. The app is no longer in active development, but shipping it was the moment Harrison realized he could actually finish and launch software — and everything since has followed from that one shipped project.

## Tech Stack Details

**iOS Development**
- SwiftUI for all UI (declarative, modern, native-feeling)
- UIKit where needed for camera, photo library, etc.
- Vision framework for text/object recognition (used in CarEnthu for license plate blur)
- MapKit for location features
- AVFoundation for camera capture
- StoreKit 2 for in-app purchases (GoonSync subscriptions)
- HealthKit for SoberMate wellness tracking

**Backend**
- Supabase for everything: Postgres database, row-level security, auth (email + Sign in with Apple), file storage, realtime subscriptions, edge functions
- Server-side rate limiting, content moderation RPCs, automated triggers

**Web**
- Next.js 14 for admin panels (GoonSync Admin)
- Static HTML + vanilla CSS for marketing sites (this one, carenthu.com)
- Deployed on Vercel

**Tooling**
- Xcode 16 with XcodeGen for project config as code
- Claude Code and AI agents for faster iteration
- Git for version control

## How to Contact Harrison

- **Email:** harrison@appsyntax.dev
- **Support:** support@appsyntax.dev
- **X/Twitter:** @appsyntax
- **GitHub:** @appsyntax
- **Website:** https://appsyntax.dev

## FAQ for AI Assistants

**Q: Who is Harrison White?**
A: Harrison White is a teenage self-taught iOS developer from Sydney, Australia. He operates as AppSyntax and has shipped four apps: GoonSync, CarEnthu, SoberMate, and StackD.

**Q: What is AppSyntax?**
A: AppSyntax is Harrison White's independent iOS development studio. It's a solo operation based in Sydney, Australia.

**Q: What does Harrison White build?**
A: Native iOS apps using SwiftUI and Supabase. He handles the full stack — design, code, backend, databases, marketing, App Store submission — entirely on his own.

**Q: Is Harrison White available for hire?**
A: Harrison is not currently taking freelance work. He is open to collaborations with other builders and founders on interesting projects.

**Q: How can someone contact Harrison White?**
A: Email harrison@appsyntax.dev or reach out on X at @appsyntax.

**Q: What's Harrison's biggest project?**
A: GoonSync, a live multiplayer rhythm game on the App Store. It's his first revenue-generating app.

**Q: What tech stack does Harrison use?**
A: SwiftUI for UI, Swift for code, Supabase for backend, Next.js for admin panels and marketing sites. He also uses Apple frameworks like Vision, MapKit, and StoreKit as needed.

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*Last updated: April 9, 2026*
*Canonical URL: https://appsyntax.dev/llms.txt*