PilferShush Jammer

F-Droid Open Source | Security

6 Downloads 11 Views v4.6 3.49 MB 4.1+

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(3.49 MB)

Editor's Overview

PilferShush Jammer is a security application developed by F-Droid Open Source, packaged as a single Android APK of version 4.6 weighing in at 3.49 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 3.49 MB, so it installs quickly even on modest connections.
This build is signed by "F-Droid Open Source" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Features a passive jammer technique that engages the microphone thereby
blocking other apps from using it. But does NOT listen to or record any of the
audio from the microphone. It uses 0% CPU and no noticeable battery use. However
is not intended to be left on permanently due to the variety of triggers that
can cause audio_focus_state changes (VOIP etc).

Also features an active jammer that emits tones constrained to the NUHF
range of 18 kHz to 24 kHz range. User determined carrier frequency and drift
limits with rate for random tone emissions depending on the device capabilities.
For instance 20000 Hz carrier, drift limit 1000 Hz and rate slow - will output
random frequency between 19 kHz and 21 kHz approximately every second.

Audible artifacts are present during the NUHF tones but this may be changed in a
future release. Experimental white noise output may not be very effective at
blocking and is a somewhat annoying sound. The device speaker output may not
have enough amplitude to block unwanted NUHF signals - testing will determine.

* Manual start
* Notification post when running
* Auto stop and restart when telephony interrupts
* Currently relies on audio_focus_state changes for auto-switching
* Active jammer

Details

Version	v4.6
Size	3.49 MB
Developer	F-Droid Open Source
Category	Security
Package	cityfreqs.com.pilfershushjammer
Android	4.1+
Last Updated	Oct 31, 2026
Downloads	6

Frequently Asked Questions

Is PilferShush Jammer free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does PilferShush Jammer require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is PilferShush Jammer safe to install?
We link to the exact APK published by F-Droid Open Source. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update PilferShush Jammer?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install PilferShush Jammer

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded cityfreqs.com.pilfershushjammer.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «PilferShush Jammer» by F-Droid Open Source and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.