Katsu: JLPT Quiz & Kanji
Study Japanese with JLPT-focused Kanji, vocabulary, quizzes, pronunciation, progress tracking, and optional cloud backups.
Apps and games
App and game development studio creating focused mobile products for Google Play and the App Store.
Project board
Live appsApps shaped for real store distribution and device usage.
A portfolio designed for utilities, learning tools, and future game releases.
Thoughtful product details, smooth interactions, and focused interfaces across every release.
Projects
Focused mobile apps and game projects built for real users, store distribution, and long-term product growth.
Study Japanese with JLPT-focused Kanji, vocabulary, quizzes, pronunciation, progress tracking, and optional cloud backups.
Clean background noise from audio files, video clips, voice notes, interviews, lectures, screen recordings, podcasts, and everyday recordings.
A Pomodoro timer and task planner with adjustable sessions, calming scenes and sounds, and progress tracking. Available on Google Play.
About
VIODRA STUDIOS focuses on building and publishing mobile utilities and interactive experiences.
Marketplace profile
Browse published releases and follow future mobile apps from the official VIODRA STUDIOS store profiles.