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Himphen Hui

From Hong Kong to Melbourne, building apps, tools and small ideas along the way.

A collection of things I've built, explored, and brought to life over the years.

About

Me and my daughter at the zoo, with giraffes behind us

I'm a software engineer from Hong Kong, now based in Melbourne. By day, I work at a company that makes game consoles. Outside work, I enjoy turning small ideas into apps, tools, and experiments.

Over the years, I've independently built Android apps, with over a million downloads, co-founded a crowdsourcing platform in Hong Kong, and even created a little 3D art gallery for my daughter's drawings.

Some projects solve everyday problems, some are just for fun, and others simply start with a thought: what if I built this?

My Work

A few things I've made along the way.

  • 2026

    Harper's Gallery

    Personal Project · Web · Three.js

    A little virtual art gallery for my daughter's drawings, where family and friends can explore her artwork in an interactive 3D space.

    GitHub

    Harper's Gallery cover: a crayon drawing hanging in a softly lit gallery.
  • 2012 — Present

    Test Your Android

    Independent App · Android

    An all-in-one Android testing toolkit I built independently, bringing hardware diagnostics, sensor checks, and system information into one simple app.

    1M+ Downloads

    Test Your Android app icon
  • 2012 — Present

    Ringtone Randomizer

    Independent App · Android

    A simple Android utility that automatically shuffles your favorite ringtones after each call. Independently developed and published.

    100K+ Downloads

    Ringtone Randomizer app icon
  • 2014 — 2022

    Collaction

    Co-founder · Social Innovation · Hong Kong

    A crowdsourcing platform I co-founded in Hong Kong to connect people, ideas, and resources, helping community-driven projects turn ideas into action. I worked across the tech, the business, and the community projects themselves.

    Collaction logo