$ whoami
Manh Nguyễn
Part-time indie dev — one job by day, one passion by night.
I build mobile apps for feng shui and Yijing studies — a field technology rarely takes seriously. No team, no investors: one person, one laptop, and tools I genuinely want to use every day.
Swift
SwiftUI
Kotlin
CoreLocation
MapKit
can-chi calendars
● online
git log --reverse
2019 — init
Ngũ Linh is born — for myself
Needing fast hexagram calculations for practice work, I wrote a small internal app. It turned out to be the first commit of the whole journey.
2024 — release
La Kinh & Thước Lỗ Ban hit the stores
The first two measuring tools go public: a sensor-driven feng shui compass and the Lỗ Ban ruler trio — both offline, free at the core.
2026 — HEAD
Ngũ Linh opens to everyone + this blog
After 7 years of private use, Ngũ Linh ships publicly on iOS & Android. Along with this place — where I log knowledge and build notes.
$ ./values.sh --list
[1] build slow, build right — measuring tools can't be "roughly correct"
[2] respect the user: offline, ad-free, zero data collection
[3] respect the sources: stay faithful to the classical texts and methods