SignDict

The world’s first Japanese Sign Language (JSL) and American Sign Language (ASL) dictionary and translation app.

Discover a faster, easier way to learn and compare Japanese Sign Language and American Sign Language. Whether you’re a student, educator, interpreter, traveler, or simply interested in sign language, SignDict provides a modern learning experience designed exclusively for Apple platforms.

Built entirely with SwiftUI, SignDict features a beautiful native interface, powerful search, offline access, and cross-platform support for iPhone, iPad, Mac, and Apple Vision Pro.

Features

• JSL ⇄ ASL Dictionary & Translation
Explore thousands of signs with side-by-side translations between Japanese Sign Language and American Sign Language.

• Fast Search
Search instantly using English, Hiragana, Kanji, or Katakana to quickly find the sign you’re looking for.

• Interactive Learning
Learn through structured lessons, practice sessions, quizzes, Hiragana charts, Dakuon, Yōon, and more.

• Compare Signs Side by Side
Understand the differences between American and Japanese Sign Language with an easy-to-read comparison interface.

• Offline Access
Study anywhere—even without an internet connection. Perfect for travel, flights, classrooms, and everyday learning.

• Designed for Apple Platforms
Built entirely with SwiftUI and featuring Apple’s native Liquid Glass design for a fast, responsive, and beautiful experience across iPhone, iPad, Mac, and Apple Vision Pro.

• Privacy First
No accounts. No advertisements. Your learning stays private.

• Active Development
SignDict is continuously updated with new signs, improved illustrations, enhanced translations, and new learning features.

Community Feedback

Sign language evolves through its community.

If you’d like to request a new sign or report a correction, you can submit feedback directly within the app by going to Settings → Feedback.

Many improvements to the Japanese Sign Language dictionary have been made thanks to feedback from members of the Deaf community, helping SignDict become more accurate with every update.

Thank you for helping make SignDict better.