USB Blocker: Antihack Security app icon

USB Blocker: Antihack Security

Juice-jacking blocker · Hacking-cable detector · USB security

That public charger — or that borrowed cable — might not be a charger at all. Malicious USB cables inject commands and install spyware the moment you plug in. USB Blocker stops the attack instantly.

★ 4.5 rating 544 reviews 10K+ downloads Everyone rated

Get it on Google Play

Free download · Works automatically on plug-in · No data collected

USB Blocker home screen with protection enabled, guarding against juice jacking attacks
Real-time alert showing a malicious USB cable attempting to inject commands
Detects hacking cables
Blocks command injection
Automatic on USB connect
Logs every attempt

HOW IT WORKS

Protected the moment you plug in

01

Install & arm it

Download free from Google Play and enable protection once. USB Blocker then guards every USB connection automatically — no manual setup per charge.

02

Plug in anywhere

Airport, hotel, café, rental car or a borrowed cable: the moment a USB device connects, USB Blocker activates and watches for injected commands.

03

Attacks get blocked & logged

If a cable or charger tries to act like a hidden keyboard and inject commands, it's stopped instantly — and every attempt is saved so you can review it.

USB locker & blocker

Blocks harmful command injection from malicious USB devices and hacking cables.

Automatic activation

Arms itself the instant a USB device connects — no taps needed.

Real-time alerts

Immediate notification when a malicious cable or device is detected.

Keylogger defense

Stops injected keystrokes from fake-keyboard cables before they execute.

Attack log

Review exactly which commands a malicious cable tried to run.

Spyware installation guard

Prevents remote command injection used to sideload spyware over USB.

FAQ

Frequently asked questions

What is juice jacking?

Juice jacking is an attack where a public charging station or tampered USB cable uses the data pins in the USB connection to steal data or install malware while your phone charges. USB Blocker detects and blocks these attempts automatically. Learn more →

Are public phone chargers actually safe?

Mostly, but security agencies including the FBI have warned against public USB ports because you can't inspect what's behind them. USB Blocker removes the gamble by blocking injected commands the moment they appear. Learn more →

How can a USB cable hack a phone?

Hacking cables (like O.MG cables) hide a chip that registers as a keyboard and types commands into your phone at superhuman speed — installing malware or changing settings. USB Blocker detects the injected keystrokes and stops them. Learn more →

Why does USB Blocker need Accessibility access?

Android only exposes physical-keyboard events (which hacking cables fake) through the Accessibility service. USB Blocker uses it solely to detect and block injected keystrokes — no personal data is collected or shared.

Is USB Blocker free?

Yes — free to download with optional premium features. Core juice-jacking and hacking-cable protection works in the free version.

Read the full Google Play description
USB Blocker: Anti Hack & Juice Jacking Protection Public chargers, unknown USB cables, and shared power banks are being used to silently hack phones. Hackers insert malicious USB cables that look identical to normal chargers — plug one in and spyware, malware, or keylogging commands can be injected into your device quickly. STOP before you connect. USB Blocker is an anti hack security app that protects you from juice jacking, hacking cables, and malicious USB devices. It detects and helps block the attack instantly — keeping your data security and privacy intact. Whether you are at an airport, hotel, office, or a friend's house, USB Blocker works silently in the background to protect you the moment you plug in. What is Juice Jacking? Juice jacking is a cyberattack where hackers use public charging stations or malicious USB cables to steal data, inject malware, or install spyware on your device without your knowledge. USB Blocker is your juice jacking blocker — detecting and stopping these attacks before they reach your data. Hacking Cables & Malicious USB Detection Some USB cables are built specifically to hack your device. OMG, that cable charging your phone might not be a charger at all — hacking cables act as a hidden keyboard, injecting commands and installing malware or spyware remotely over Wi-Fi. USB Blocker detects when any USB cable or device attempts to inject commands and stops the attack immediately. + Detect hacking cables that simulate keyboard input to inject malicious commands. + Block USB-based keylogger attacks — stops injected keystrokes before they execute. + Real-time alerts when a malicious USB device or hacking cable is detected. + Protection against remote command injection and spyware installation via USB. Features of USB Blocker: Anti Hack Security USB Locker & Blocker Blocks harmful command injections from malicious USB devices and hacking cables, providing anti hack data protection that shields you from spyware, malware, and keylogger attacks via USB. Feel safe connecting to any USB cable knowing USB Blocker is on guard. Automatic Anti Hack Activation Activates automatically the moment a USB device connects — no manual setup needed. This seamless juice jacking protection blocks hacking attempts and keeps malware and data security risks under control. Real-Time Security Alerts Get immediate security alerts for any suspicious USB activity. USB Blocker detects malicious USB cables and devices the moment they attempt an attack — so you are always aware before they can compromise your data security. Save & Scan Commands Logs every hacking attempt so you can review which commands malicious USB cables tried to inject. Monitor threats and stay in control of your device protection. Who Needs USB Blocker? + Travellers using airport, hotel, or café USB charging stations. + Remote workers connecting to unknown USB ports or shared office chargers. + Security-conscious users who connect to public chargers or receive USB cables from unknown sources. Stay safe with USB Blocker — your anti hack shield against juice jacking, hacking cables, malicious USB attacks, and data theft. Privacy & Data Protection: "This app uses Accessibility services." This app requires a service for being able to detect when hacking cables are trying to inject commands so it can stop hackers and spyware. Since normal service can't detect when malicious cables push physical keyboard events we need "Accessibility services" for doing that. It does not do anything apart from detecting when physical keys is pressed to protect you. We don't collect or share any personal data using that service.

Your next charge could be a trap. Not anymore.

Free · Automatic protection · Attack log included

Get it on Google Play