01
Original apps
Create helpful consumer products like Rubito, from idea and UX through release and iteration.
Apps, games, and web studio in Japan
Apps, games, and web experiences for everyone.
Rubydai builds original B2C products and custom software by request: mobile apps, games, websites, and AI-enabled tools for customers in Japan and beyond.
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Rubito
Search kanji...
GOOD THINGS
are coming
Learn More
MAKE
it easy
Join
●
Profile
▣
Chat Bot
▰
Grammar
▤
Reading
あ
Kanji
Abc
Vocabulary
☆
Practice
⌁
Exam
Feature App
View allCreate Story
Create Story Videos
Listening
Text to Speech
Chatbot
Daily roleplay
Rubydai Company
We build useful digital products for people and teams.
Our work covers B2C apps and games we publish ourselves, plus custom apps, games, websites, landing pages, and business tools for customers by request.
02
Games
Build playful mobile and web games with smooth interfaces, clear loops, and polished interaction.
03
Custom web
Deliver websites, landing pages, web apps, dashboards, backend services, and AI integrations.
Example B2C product
Rubito helps people learn Japanese and enjoy living in Japan.
Process
A focused process for original products and customer work.
↗
Discover
Understand the audience, platform, scope, budget, and success goals.
✦
Design
Plan the app, game, or website flow, then shape the screens and core interactions.
✓
Launch
Build, test, release, and keep improving based on real user feedback.
Start a project
Build an app, game, or website with Rubydai.
We create our own B2C products and also build custom digital products for customers by request.