Frequency Generator - Audio Tools & Ultrasound v4.3
APK · 2.3 MB · version code 32 · Android 5.0+ · uploaded Jul 30, 2026
- v3.7 is signed like the Google Play version Get v3.7
The source store flagged this file with a security warning (Warning). We recommend not installing it. See other versions.
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v3.7, uploaded Aug 27, 2026 — about 27 days after this one.
- Size: this file is 2.3 MB; the latest is 3.4 MB (1.1 MB larger).
- Android: this version needs Android 5.0+; the latest needs Android 4.1+.
- The latest version asks for 2 more permissions: In-app purchases (Google Play Billing), Google Play install referrer.
- The latest version no longer asks for: Access all files, Read shared storage, Run at startup, Modify shared storage, Internal broadcast protection (app-defined).
File information
- Version
- v4.3 (32)
- Uploaded
- Jul 30, 2026
- Size
- 2.3 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- 57b754c570e4d92ff12612d6b56a4c4b
- Signing certificate (SHA-1)
- A1:DD:24:C5:83:81:1D:94:6C:B3:8A:56:F9:72:16:CA:2D:43:7D:E1
- Signed by
- [email protected], CN=Alex, OU=MilkyWay, O=University, L=SaintPetersburg, ST=Petersburg, C=RU
- File name
- com-boedec-hoel-frequencygenerator-32-75865733-57b754c570e4d92ff12612d6b56a4c4b.apk
- Package
- com.boedec.hoel.frequencygenerator
- Downloads (all versions)
- 5M+
- Age rating
- PEGI 3 · Everyone
What's new in v4.3
• Volume sliders now also display their value as percentage.
• Added a setting for advanced users who need to display volumes in dBFS.
• Fixed a display issue affecting octave buttons on narrow screens.
Permissions (9)
This version requests 9 permissions, 3 of them sensitive.
- Access all files Sensitive android.permission.MANAGE_EXTERNAL_STORAGE
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
- Full network access android.permission.INTERNET
- Internal broadcast protection (app-defined) com.boedec.hoel.frequencygenerator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- Run foreground services android.permission.FOREGROUND_SERVICE
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Warning
Signing certificate
- Certificate issued to “University” Not the developer's name (“Hoel Boedec”). Names in certificates can't be verified, so this alone proves nothing.
- The same certificate signs apps from 7 different developers Developers normally sign only their own apps. This can mean the files were re-signed by someone else — or that one company builds or publishes apps under several names.
- Signed differently from the Google Play version v3.7, which matches Google Play, uses another certificate. Android normally won't update an installed Play Store copy with this file. v3.7
Store checks
- Developer signature check failed Jan 20, 2023
- Uploaded by “aplicationpaidprofree” Bronze tier · 1,631 followers · uploading since 2018
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself.
How to install Frequency Generator - Audio Tools & Ultrasound on Android 5.0+
You'll need about 4.5 MB of free space.
- Download the APK — tap Download APK above (2.3 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-boedec-hoel-frequencygenerator-32-75865733-57b754c570e4d92ff12612d6b56a4c4b.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 57b754c570e4d92ff12612d6b56a4c4b. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. The source store flagged this file with a security warning; we recommend not installing it. If Play Protect blocks it, tap Cancel. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Frequency Generator - Audio Tools & Ultrasound — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 5.0+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source; for this file we recommend not to.