ohmybodyiOS Health Dashboard
Workouts, Activity Rings, sleep and vitals from Apple Health, with calendar widgets. On the App Store.
I build Apps, Agents, AI tools & more.
Hey, I'm Justin (Ziheng). I'm studying Management & Analytics at NYU after a B.Sc. in Statistics & Mathematics at U of T. I build native apps in Swift, agents and AI tools on top of LLMs, and the backends and data work that keep them running.
Currently building Apps · ohmybody.ijustinz.com · docs.ijustinz.com
ohmybody
ohmybodyMarketing Site
The home of ohmybody at ohmybody.ijustinz.com, with charts drawn to match the app's own. A static Next.js site on Cloudflare Pages.
Launched docs.ijustinz.com, the documentation hub for the ohmytask, ohmycoin & ohmybody apps.
June 2026
TSohmycoin Backend
AI API on Cloudflare Workers
Hardware-attested sessions and a server-side proxy for expense extraction, so AI keys never ship in the app.
ohmycoiniOS Spending Tracker
Fast expense entry, voice and receipt capture, budgets and AI spending insights. In public TestFlight.
ohmytask for MacmacOS Task Manager
A Mac-native edition of ohmytask with a boards sidebar, sharing its SwiftData backend with the iOS app.
Started my M.Sc. in Management & Analytics at New York University.
September 2025
JSJobMuse
Career Ops GUI
A local-first workspace that runs AI-assisted job scans and reports, and streams logs back to the GUI.
ohmytaskiOS Task Manager
Kanban boards, a Notion-style task editor, reminders and widgets, plus a natural-language Task AI. In public TestFlight.
TSohmytask Backend
AI API on Cloudflare Workers
A stateless AI relay: the iOS app runs tool calls locally against SwiftData, the backend only brokers model turns.
Joined Xiaomi's Proretail team as a backend developer intern. Built clue-statistics modules and cut clue-count response time by about 100 ms with SQL tuning.
July 2024
JNASA Space Apps
Global Hackathon Backend
REST-style APIs over official NASA data with real-time and manual fetching, and API contracts for the frontend.
RToxi-Can
Canada's Industrial Pollutants
An interactive, multi-page story that makes environmental risk data readable for non-technical audiences.
Graduated from the University of Toronto with a double major in Statistics & Mathematics.
July 2025
RHouse Price
U.S. Real Estate Trends
Statistical models over two decades of housing prices, with regional comparisons in ggplot2.
JMedia Manager
Spotify Desktop Client
A Java Swing app over the Spotify API, where I led the team and built the search and song-add flows.
Nothing tagged that yet.