Yaccel: AI Interpreter
Japanese, Clearly Understood
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Cross the language barrier, together.
Yaccel is an AI voice interpreter for conversations between Japanese and English, plus Vietnamese, Thai, Korean, and Chinese. It is made for the moments when you need to understand and be understood: a meeting, a landlord visit, a family conversation, a talk, or a trip.
■ Hear the speaker—even from your seat
At a presentation or meeting, use your phone's built-in microphone to pick up a speaker at a distance and see the interpretation as they speak. Follow a talk from the audience, without needing to sit near the stage.
■ Follow the conversation, not just the words
Meaning changes with the situation. Yaccel considers the flow of the conversation, so a Japanese response can be understood as the polite refusal, agreement, or nuance it is meant to convey—not merely translated word by word.
■ Ask what you missed
Did a discussion move too quickly? Ask Yaccel in chat for a summary of what was just said or for the meaning behind a phrase. Catch up after a meeting or clarify a moment in a talk.
■ Speak face to face
Tap either language button for two-way conversation interpreting. Turn the screen toward the other person to show large, easy-to-read text, then have the translation read aloud.
■ Write with more confidence
Paste a chat screenshot to understand a message and get reply suggestions that fit the conversation. Use the Yaccel translation keyboard on iPhone to translate as you type in any chat.
■ Made for life in and with Japan
For English speakers living, working, traveling, or building relationships in Japan—and for anyone who works with Japanese-speaking colleagues, managers, customers, friends, or family—Yaccel helps conversations keep moving.
Languages: Japanese, English, Vietnamese, Thai, Korean, and Chinese.
Terms of Use (EULA): https://yaccel-app.web.app/terms
Privacy Policy: https://yaccel-app.web.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Switch to another app while recording and the translation keeps flowing in a picture-in-picture window (Pro Plus)
• The latest translations and a stop button now appear on the Lock Screen
• Added yearly plans, the Business plan (30 hours a month) and a 5-hour interpreting pack
• See this month's interpreting time and balance in Settings
The developer, Shuwa, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SYUWA KAWAMURA
- Size
- 77.7 MB
- Category
- Reference
- Compatibility
Requires iOS 18.5 or later.
- iPhone
Requires iOS 18.5 or later. - Mac
Requires macOS 15.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.5 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Shuwa-Lab