Last Updated

May 2026

Introduction

Welcome to Jozu which will be referred to in this document as Jouzu.

Jouzu is a Japanese language learning application focused on daily hiragana word puzzles, JLPT vocabulary practice, and interactive study tools.

This Privacy Policy explains how information is collected, used, and protected when you use the Jouzu mobile application.

By using Jouzu, you agree to the practices described in this Privacy Policy.

Information We Collect

Account Information

When you create an account, we may collect:

• Email address
• Authentication information managed through Firebase Authentication

Usage Information

We may collect limited usage data related to how the app functions, including:

• Puzzle completion progress
• Accuracy statistics
• Learning streaks
• JLPT level preferences
• Feature usage data

Device Information