001 · Introduction
File No. 2026/001Personal notebook · chapter 01Saigon, 29°C light sun
I make software like writing a letter — with purpose, for people, with room for mistakes.
Hi, I'm Bang. I build mobile apps, macOS tools, and small games — usually solo, always with intent. I believe clean architecture and thoughtful detail are the things users never see but always feel.
§ 02 / project book
Four things I've shipped & keep nurturing.
iOS + Android
dare not to tap
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.
iOS + Android
one calm puzzle a day
Lumo — One calm puzzle a day
A daily numberlink puzzle — connect matching dots, fill the grid, keep your streak. Offline, no account, no pressure.
iOS + Android
the one I'm proudest of ♥
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.
macOS
0 data loss, guaranteed
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.
§ 03 / now
This month, I'm…
building
Commute Guest — daily commute challenge
reading
lots of AI research papers
learning
AI, every day
listening
lofi to relax
p/s. still trying
to ship a small
challenge daily
— b.
to ship a small
challenge daily
— b.