Independent apps. A personal journey.
I build apps for learning, creativity, and the small things that make a day easier. Coviet is a home for that work, and for everything still to come.
Selected work
A growing collection of ideas, made into things you can use.
For iPhone and iPad
Color an abstract art puzzle one shape at a time, discover a picture in the fragments, then hear your coloring journey become calm piano music.
Gray Matter is an art and coloring puzzle for iPhone and iPad. Explore an abstract field of shapes, color what catches your eye, and listen as your route through the picture becomes music.
Discover the app
Free web game · No ads · English and Vietnamese
Free, ad-free learning for ages 8–10: Vietnamese Telex typing, illustrated English stories, coding and quizzes. No behavioral tracking; progress stays in your browser.
A free learning space for beginners aged 8–10, with no ads, no behavioral tracking and no account needed. Progress stays on this browser, and family members can use separate made-up nicknames. Join Fox in a little keyboard forest. Practise touch typing, learn English through 26 illustrated English stories at three reading levels, with greetings, feelings, action words, useful phrases and comprehension questions with Vietnamese meanings, and guide Fox home with your own programs. Explore 50 more bilingual lessons with short explanations, illustrated scenes, playful activities, typing sentences and two-question quizzes. The coding workshop now includes 31 activities, with 20 new funny games and creative programs.
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iOS app in preparation. Android is in development.
On-device ID photo studio for both digital uploads and physical printing on iPhone and iPad.
Take or import a photo, refine it, save one digital JPEG for online upload, or create an exact-size print-ready sheet.
Discover the appBehind Coviet
COVIET · TOKYO
I learn, create, and build with a simple hope: a better life for myself, my family, and the people around me. This is where I share the apps and ideas that grow along the way.
A dream in progress
My dream starts close to home: helping myself, my family, and my relatives build a better life. It reaches further, too—to everyone with that same hope. I want to share what I have learned, created, and built, so that something useful to me can become useful to someone else.
Across my projects
From a child’s first colors to a new language, these are some of the projects I am working on.
Coloring & creativity
A colorful space for children to draw, explore, and create.
Visit websiteJapanese learning
A Japanese-learning project built around everyday practice.
In development
Learning together
Resources to help parents introduce English in everyday moments.
In development
Contact
A useful idea often starts with a conversation. I would love to hear what you are learning, making, or wishing an app could help with.