Must Know

This app includes the bonus flashcards for the Must Know series.

McGraw-Hill Professional · com.interactiveworks.mhemustknow

Not rated yet 1K+ downloads v10.0.0 69.9 MB Android 6.0+ PEGI 3 · Everyone

Download APK 69.9 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v10.0.0 (100001)
Updated: Mar 17, 2026 (7 months ago)
APK size: 69.9 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: Nov 10, 2020 (at least)
Permissions: 6 (3 sensitive)
Website: mhprofessional.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Must Know is an app by McGraw-Hill Professional in the Education category, listed since at least November 2020. 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.

It asks for 6 permissions, 3 of them sensitive: record audio, read phone status and identity and modify shared storage.

What's new in v10.0.0

High School Grammar and Composition are now included in the app.

Description

From the listing uploaded by “appupdater”.

This app includes the bonus flashcards for the Must Know series. They will help you test yourself on what you’ve learned as you make your way through any of the books. Each book’s set includes 100-plus “flashcards,” both “front” and “back.”

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Mar 17, 2026.
Certificate issued to “Interactive Works” This is the certificate of the Google Play version.

Store checks and file details

Developer signature verified May 19, 2024
Validated against Google Play Mar 17, 2026
Signed byCN=Patrick Geiger, OU=Interactive Works, O=Interactive Works, L=Chicago, ST=IL, C=US
Signing certificate (SHA-1)C5:30:A7:D5:B3:17:54:F8:2C:DE:41:5B:09:ED:C4:6E:B4:23:23:1B
File MD5196a0db24c0349cdbb889a1dc3838c7b
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. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (6)

Must Know requests 6 permissions, 3 of them sensitive.

Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
Modify audio settings android.permission.MODIFY_AUDIO_SETTINGS

Required hardware & features

Basic touch input android.hardware.faketouch
Microphone android.hardware.microphone

Must Know APK: questions and answers

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 Must Know 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. After downloading, check that the file's MD5 is 196a0db24c0349cdbb889a1dc3838c7b.