The project book — complete.
Everything here I wrote, designed, tested, and shipped solo. No "client work" — just personal products I actually use.
HOLDLINE — One tap. Hold your nerve.
A one-tap reflex puzzle about knowing when not to tap — every TICK flips a switch and burns energy.
Lumo — One calm puzzle a day
A daily numberlink puzzle — connect matching dots, fill the grid, keep your streak. Offline, no account, no pressure.
ChessMentor – Learn Chess with Vietnamese AI Coach
A free forever chess learning app designed for Vietnamese children. 3-minute micro-puzzles, offline play, AI Coach explains in Vietnamese.
MacSweep Guard – Safe Mac Cleanup
Scans redundant user-space data, lets you preview before cleanup, and protects every action with Safe-Trash for easy rollback.
Orburst — Clear rings, break records
A concentric ring puzzle game — easy to learn, hard to put down, and there is always a move.
PipForge — Forge logic every day
A daily domino logic puzzle — short enough to play every day, deep enough to keep you coming back.
Recurio — On time, every time
A home maintenance management app. Auto-reminds when tasks are due, logs history per device.
Split Ledger – Easy Group Expense Splitting
Mobile-first app for tracking group expenses, capturing receipts, and settling debts effortlessly.
Lịch Việt – Vietnamese Lunar Calendar
A Vietnamese solar–lunar calendar app with feng shui & almanac insights across iOS, Android and web.