YY School(와이와이스쿨)

Hi. YY School (Waio School).

B2 Corp. · com.andromeda.yyschool

Not rated yet 5K+ downloads v20.0c 5.1 MB Android 6.0+ PEGI 3 · Everyone

Download APK 5.1 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v20.0c (925)
Updated: Oct 1, 2026 (8 days ago)
APK size: 5.1 MB
Requires: Android 6.0+ (API 23)
CPU support: Any (no native code)
Category: Education (app)
Listed since: Jan 19, 2021 (at least)
Permissions: 18 (4 sensitive)
Website: iday-b2.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

YY School(와이와이스쿨) is an app by B2 Corp. in the Education category, listed since at least January 2021. It has no native code, so it runs on any Android processor.

Since version 16.5, the minimum Android version rose from 4.0.3 to 6.0. It asks for 18 permissions, 4 of them sensitive, including camera, read contacts and find accounts on the device. Compared with version 20.2a, it adds 1 new permission (“Read media audio”) and drops 2 (“Read media images” and “Read media video”).

Description

From the listing uploaded by “appupdater”.

Hello. Welcome to the YY School app. This app provides one-on-one updates on your child's activities. If you have any questions, please leave a message in the inquiry section. Thank you.

Version history

5 versions are listed, going back to v16.5. Since v20.0c it requires Android 6.0+.

v20.0c LATEST Oct 1, 2026 5.1 MB TRUSTED v20.2a Dec 7, 2025 6.1 MB TRUSTED v20.1a Apr 30, 2025 6.1 MB TRUSTED v20.0b Mar 26, 2025 6.1 MB TRUSTED v16.5 Mar 23, 2023 5.3 MB TRUSTED

All 5 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Oct 1, 2026.
Same certificate as the 4 other versions checked

Store checks and file details

Developer signature verified Oct 1, 2026
Validated against Google Play Oct 1, 2026
Signed byC=KR
Signing certificate (SHA-1)B5:FC:88:1E:45:FF:1A:05:D6:35:F1:C1:2A:26:F3:3F:F5:7D:6B:2E
File MD57fe459a7b55d08ed3b0fff58f5d56e17
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 (4 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (18)

YY School(와이와이스쿨) requests 18 permissions, 4 of them sensitive.

Camera Sensitive android.permission.CAMERA
Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
Read contacts Sensitive android.permission.READ_CONTACTS
Read media audio Sensitive android.permission.READ_MEDIA_AUDIO
C2dm send (custom) com.google.android.c2dm.permission.SEND
Control vibration android.permission.VIBRATE
Full network access android.permission.INTERNET
Get tasks android.permission.GET_TASKS
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
Internal broadcast protection (app-defined) com.andromeda.yyschool.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Push messaging (app-defined) com.andromeda.yyschool.permission.C2D_MESSAGE
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Request ignore battery optimizations android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

YY School(와이와이스쿨) APK: questions and answers

Is there a version of YY School(와이와이스쿨) for older Android phones?

The current version needs Android 6.0 or later. Version 20.2a is the newest listed build that installs on Android 5.0 and later. Get version 20.2a · 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 the YY School(와이와이스쿨) 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 4 other versions checked. After downloading, check that the file's MD5 is 7fe459a7b55d08ed3b0fff58f5d56e17.