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Independent digital studio
Ideas with
lasting shape.
We design and build useful software — from thoughtful everyday products to ambitious tools that solve real problems.
Strategy / Design / Engineering
From first sketch to launch
Products shaped around people
Privacy-aware AI and systems
One team, end-to-end ownership
The ecosystem
One home. Many useful directions.
Explore the products, projects, and practical ideas that make up the studio.
Recent work
Shipped, tested, documented.
A few recent builds from the studio — AI, on-device systems, and tools we run ourselves.
NihonGO! AI Japanese Tutor
AI tutoring with 3D avatar conversation, FSRS review, and a full monetization audit before launch.
FlutterHonoSupabase
View project 
Kaiwa Coach
On-device pronunciation scoring in Rust — DTW, pitch contours, and signed lesson packs. No audio leaves the phone.
RustFFIFlutter
View project 
VietProStocks
Cited market research that runs on a Raspberry Pi: FAISS retrieval, hybrid rerank, URL-validated sources.
FastAPIFAISSllama.cpp
View project A better default
Beautiful when it is quiet. Powerful when it matters.
We remove noise so the important things come forward: a precise interaction, a useful idea, a little more time for what matters.
Deliberate by designHuman at the center
Latest from Our Blog
Insights, tutorials, and updates from our team
Technology
October 6, 2026
5 min read
Architecture Rules That Fail the Build: Shipping Multiple Flutter Apps From One Platform
Two products, one Dart workspace, zero cross-imports — enforced by tooling instead of documentation.
By Viet NguyenRead More
AI
September 30, 2026
5 min read
Self-Hosted OCR in 2026: DeepSeek-OCR on vLLM vs. Template Pipelines
Two document projects, two philosophies: a vision model for Markdown quality and a template engine for structured JSON.
By Viet NguyenRead More
AI
September 24, 2026
4 min read
Scoring Japanese Pronunciation on the Phone: DTW, Rust, and the Bugs That Made It Real
No audio leaves the device: how Kaiwa Coach scores mora timing and pitch with a Rust engine behind Dart FFI.
By Viet NguyenRead More