iKnow!

iKnow! - Master Japanese and Chinese. Your Personal Language Learning Tool.

DMM 英会話 · com.cerego.iknow

Not rated yet 100K+ downloads v5.6.1 16.6 MB Android 6.0+ PEGI 3 · Everyone

Download APK 16.6 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v5.6.1 (50238)
Updated: Aug 4, 2026 (2 months ago)
APK size: 16.6 MB
Requires: Android 6.0+ (API 23)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Education (app)
Listed since: Jul 15, 2021 (at least)
Permissions: 18
Website: iknow.jp
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

iKnow! is an app by DMM 英会話 in the Education category, listed since at least July 2021. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 5.5.3, the minimum Android version rose from 5.0 to 6.0. It asks for 18 permissions, none of them sensitive. It asks for the same permissions as version 5.6.0. The app offers in-app purchases through Google Play and can read the advertising ID that ad and analytics services use.

What's new in v5.6.1

・ Fixes some crashes. ・ Fixes UI not displaying correctly in some tablets.

Description

From the listing uploaded by “appupdater”.

iKnow! is a personalized language learning tool based on advanced learning algorithms designed to help you learn faster and more efficiently. The mobile app is a companion study tool to the iKnow! website (iknow.jp). With this app, you can enjoy the iKnow! experience on your phone or tablet. Your iKnow! study progress on your Android device is automatically synched to your PC account, so you can study in the way that best matches your needs and lifestyle. “Japanese, Chinese, and English” Official courses are offered for studying Japanese, Chinese, and SAT English. The Japanese Core 6000 covers the 6,000 most commonly used words in Japanese, and the Chinese Core 2000 covers the 2,000 most commonly used words in Chinese. All words have sample sentences and audio. “Spaced rehearsal learning” iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! calculates an optimal moment to review what you have learned so that you can learn more effectively. “Guided study” iKnow! tells you what to study and when. Based on your targets and performance, iKnow! manages your study for you. ＊＊＊＊＊＊＊＊＊＊＊＊＊＊ Features: - Five study applications: iKnow!, Self Check, Rapid Choice, Sentence Trainer and Listening. - iKnow!: Master words and phrases with our patented learning algorithms. - Self Check: Quickly self-assess your own knowledge. - Rapid Choice: Fast-paced quizzing and review. - Sentence Trainer: Master sentence patterns and constructions. - Listening: Listen to content on the go. You can slow down and repeat any audio. - Study progress synched across Android, iOS and PC accounts

Version history

3 versions are listed, going back to v5.5.3. Since v5.6.1 it requires Android 6.0+.

v5.6.1 LATEST Aug 4, 2026 16.6 MB TRUSTED v5.6.0 Sep 28, 2025 15.9 MB TRUSTED v5.5.3 Sep 30, 2024 15.3 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Aug 4, 2026.
Certificate issued to “Cerego Japan Inc.” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Aug 4, 2026
Validated against Google Play Aug 4, 2026
Signed byO=Cerego Japan Inc., L=Shibuya, ST=Tokyo, C=JP
Signing certificate (SHA-1)C8:17:53:F9:ED:CA:44:56:6A:A5:F3:77:11:97:11:AE:1B:F8:1F:D1
File MD521aca8040c7167fe20acb774ec0dc1b6
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (18)

iKnow! requests 18 permissions, none of them sensitive.

Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Advertising ID com.google.android.gms.permission.AD_ID
Control vibration android.permission.VIBRATE
Foreground service media playback android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) com.cerego.iknow.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Reorder tasks android.permission.REORDER_TASKS
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
Use biometric hardware android.permission.USE_BIOMETRIC
Use fingerprint hardware android.permission.USE_FINGERPRINT
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch

iKnow! APK: questions and answers

Is there a version of iKnow! for older Android phones?

The current version needs Android 6.0 or later. Version 5.6.0 is the newest listed build that installs on Android 5.0 and later. Get version 5.6.0 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is iKnow! free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the iKnow! APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 21aca8040c7167fe20acb774ec0dc1b6.