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Android Apps > Education > OTO Navi - Sound Navigator
OTO Navi - Sound Navigator icon

OTO Navi - Sound Navigator

by The Japan Times Publishing · Education · Free
On Google Play since December 2019 · Data updated 2026-11-01

OTO Navi - Sound Navigator is made and published by The Japan Times Publishing. AppBrain is an independent app data site and isn't affiliated with The Japan Times Publishing. The app name, icon, screenshots and description belong to The Japan Times Publishing and are shown as published on Google Play.

AppBrain's verdict

EstablishedWell rated
Rating on Google Play
4.00
251 ratings
Installs
270 thousand
Last updated
January 7, 2026
Ads
No ads
Size
69.4 MB

OTO Navi - Sound Navigator has 270 thousand installs. Users rate it well: 4.0 stars from 251 ratings.

Download on Google Play

User feedback

Ratings and reviews on Google Play

Comments on OTO Navi - Sound Navigator for Android

★★★★★ Eugene & Rachel Spagnuolo · Jun 11, 2024
Unbelievable. This app is completely changed by Japanese studies for the better. And to be free is just crazy. Between this and Japan times vocabulary and kanji apps, genii Japanese is so much better. It's not a classroom, but it is so much better than just studying the book.
★★★★★ Namiko Asuka · Mar 29, 2022
Working as intended with my GENII textbook. Downloads worked well and the audio complements my textbook well.
★☆☆☆☆ Joe Lewis · Mar 26, 2020
Scanned the book in. The audio files won't download. I press the button and nothing happens.
★☆☆☆☆ Cameron Butler · Nov 9, 2025
App doesn't work. Open it and it just doesn't do anything. No way to add books you're using or even interact with the app.
★☆☆☆☆ Greenview Media · Sep 20, 2021
App gives me an error code whenever I open it, and it sits on the main screen. I tried updating but still doesn't work.
★☆☆☆☆ Airi · Mar 13, 2021
Can't download some lessons, such as lesson 10 in Genii 1 textbook, which means I can't follow exercises.

Google Play Rating history and histogram

130
55
36
0
30

Store listing

By The Japan Times Publishing, from Google Play

“App for listening to audio material of books from The Japan Times Publishing”

OTO Navi - Sound Navigator Screenshot 1 of 5
OTO Navi - Sound Navigator Screenshot 2 of 5
OTO Navi - Sound Navigator Screenshot 3 of 5
OTO Navi - Sound Navigator Screenshot 4 of 5
OTO Navi - Sound Navigator Screenshot 5 of 5
Screenshots by The Japan Times Publishing, from the Google Play listing
Description by The Japan Times Publishing Written by the developer, not by AppBrain. Click to read.
OTO Navi is an app for listening to audio material provided with books published by The Japan Times Publishing, Ltd. Before, this material was available only through supplementary CDs or MP3 file downloads, but now OTO Navi lets you use your smartphone or tablet to listen to it anywhere, anytime!

●How to use OTO Navi●
It’s three easy steps: 1. Search for the book / 2. Download the audio material / 3. Play it!

1. Search for the book
You can easily search the database for the target book by either entering a keyword (title, author, or ISBN) or scanning the bar code on the book you own. If searching by bar code, scan the upper bar code of the two printed on the book’s back cover.

2. Download the audio material
You can download either the full set of audio material for the book, or just the sections you want. If downloading the full set, you may want to use a WiFi connection.

3. Play it!
OTO Navi offers several handy playback features to aid your studies, including 3-second skipping back/forward and repeating of a single track, a single section, or all sections.

Recent changes:
・Enhanced Book Search
・Improved matching for text format variations (full-width/half-width, kanji/katakana, etc.)
・Supports multi-keyword AND search
・Author name search added

・Fixed an issue where continuous playback did not work correctly on some devices
Download on Google Play Also on the App Store

Safety and technology

Found in the app by AppBrain
Ads
No ads
Price
Free
Libraries
17
App size
69.4 MB
Needs Android
7.0+
Content rating
Everyone

Technologies used by OTO Navi - Sound Navigator

10 permissions · 17 libraries
Subscribe to see full permission and library details

Releases

Updates seen on Google Play
Version
1.1.7
Launched
December 2019
  • Jan 7, 2026UpdateVersion 1.1.7
  • Nov 16, 2025UpdateVersion 1.1.6
  • Oct 26, 2025UpdateVersion 1.1.5
  • Aug 13, 2025UpdateVersion 1.1.4
  • Jul 14, 2025UpdateVersion 1.1.3
Show all changes Show fewer

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Also available on the App Store

OTO Navi - Sound Navigator icon OTO Navi - Sound Navigator
The Japan Times Publishing, Ltd.
3.4
Free
5 ratings

Installs

Tracked by AppBrain
Last 30 days
6.6 thousand
Per day
220
30-day average
Play install range
100+ thousand
Launched
December 2019

Installs over time

OTO Navi - Sound Navigator has been installed 270 thousand times. Over the past 30 days, it averaged 220 installs per day.

Rankings

Google Play top charts
Highest rank
#123
Chart
Top Free
Education
Country
Japan

Google Play Rankings for OTO Navi - Sound Navigator

Top rankings

Rank Country Category List
123 Japan Education Top Free
Show all market rankings

Ranking history in Japan

About the app and developer

About OTO Navi - Sound Navigator

OTO Navi - Sound Navigator is an education app developed by The Japan Times Publishing.

How many times has OTO Navi - Sound Navigator been downloaded?

OTO Navi - Sound Navigator has been downloaded 270 thousand times. In the last 30 days, the app was downloaded 6.6 thousand times.

What is the rating of OTO Navi - Sound Navigator?

OTO Navi - Sound Navigator is rated 4.00 out of 5 stars, based on 250 ratings.

Is OTO Navi - Sound Navigator free?

OTO Navi - Sound Navigator is free. The APK size is 69.39 MB. The latest APK version available is 1.1.7. The last update was on January 7, 2026.

What are the requirements for OTO Navi - Sound Navigator?

OTO Navi - Sound Navigator requires Android 7.0+ or higher. The app has a content rating of Everyone. The APK has been available on Google Play since December 2019.

App Performance Report

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Developer information for The Japan Times Publishing

The Japan Times Publishing

app-service@japantimes.co.jp

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Share OTO Navi - Sound Navigator

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