Security middleware

151 reusable Security middleware libraries across every platform — libraries, SDKs, and drop-in systems. You should never have to know which ecosystem it lives in.

• Advanced PassGen

  by CodeDead · Free · fdroid

  Generate passwords with ease.

  Security   Android

• Advanced PortChecker

  by CodeDead · Free · fdroid

  Check if TCP ports are open.

  Security   Android

• Aer - Fork of Anemo

  by fdroid · Free · fdroid

  Private storage utility for android with support for external storage media

  SecurityEncryption   Android

• AFWall+

  by portgenix · Free · fdroid

  Control network traffic

  Security   Android

• AirGuard - AirTag protection

  by Dennis Arndt · Free · fdroid

  AirGuard detects trackers that are used for stalking and warns you.

  Security   Android

• AliasVault

  by Leendert de Borst · Free · fdroid

  Privacy-first Password Manager with Built-in Email Aliasing

  Security   Android

• Amber

  by greenart7c3 · Free · fdroid

  Nostr event signer for Android

  Security   Android

• android-agent

  by Dynaevangelical2652 · Free · github

  Control Android devices through ADB with this Python automation framework for task execution and phone farm scaling.

  AIAutomationSecurity   PythonAndroidWeb

• App Lock

  by Pranav Purwar · Free · fdroid

  Secure your sensitive apps with powerful biometric protection using AppLock!

  Security   Android

• AppVerifier BG

  by RoundSalmon4 · Free · fdroid

  Verify installed apps against shared signature hashes and databases.

  Security   Android

• Authnkey

  by Michel Le Bihan · Free · fdroid

  Passkey credential provider for hardware security keys

  Security   Android

• Authorizer

  by tjado mäcke · Free · fdroid

  Password Manager with USB Keyboard emulation

  Security   Android

• Banana Split

  by mezinster · Free · fdroid

  Split secrets into QR-code shards using Shamir's Secret Sharing

  Security   Android

• BinderFuzzy - Pentest Android Services

  by ChickenHook · Free · fdroid

  An App intended for fuzzing the Binder interface and System Services of Android.

  Security   Android

• BLE Radar

  by BLE Research Group · Free · fdroid

  A tool to monitor, analyze and find BLE devices around you.

  Security   Android

• Blink Comparison

  by Yaroslav Pronin · Free · fdroid

  Simplifies comparing photos of tamper-evident seals using your eyes

  Security   Android

• Bluecheese

  by Mehrdad S. Beni · Free · fdroid

  Offline text encryption-fast, local, no trackers.

  Security   Android

• BlueGate

  by Vladimir Goncharov · Free · fdroid

  Android client to control bluegate BLE gate controller

  Security   Android

• BluePass

  by Manuel Huber · Free · fdroid

  BluePass extracts 2FA tokens from SMS and forwards them via Bluetooth

  Security   Android

• CarVita

  by JeziL · Free · fdroid

  Personal assistant for managing and predicting your vehicle's maintenance needs.

  Security   Android

• Citrine

  by greenart7c3 · Free · fdroid

  Nostr relay for Android

  Security   Android

• CleanSlate

  by khalifa R. · Free · fdroid

  Protect your data anywhere anytime

  Security   Android

• Cryptographic ID

  by fdroid · Free · fdroid

  Attest the trustworthiness of a device using asymmetric cryptography

  Security   Android

• CryptoSafe

  by nemoXdev · Free · fdroid

  Offline AES-256-GCM text encryption with Argon2id

  Security   Android

• CryptX

  by PersonX · Free · fdroid

  Simple Android Cryptography Toolkit

  Security   Android

• Derandom

  by Arno Onken · Free · fdroid

  Pseudo random number predictor

  Security   Android

• Diceware Password Generator

  by fdroid · Free · fdroid

  Generate diceware passwords

  Security   Android

• Disabler

  by fdroid · Free · fdroid

  Disable any applications, and easily enable it with a pretty customisable launch

  Security   Android

• DissPair

  by ThreadpoolX and Tapadyuti Baral · Free · fdroid

  Bluetooth security toolkit

  Security   Android

• Droid_SCEP

  by Georg Sieber · Free · fdroid

  Get certificates from a SCEP server and monitor the expiration

  Security   Android

• DroidCrypt

  by fdroid · Free · fdroid

  A file and text encryption tool for Android

  SecurityEncryption   Android

• Dumpsys Packages Copycat

  by fdroid · Free · fdroid

  Provides a detailed summary of all installed packages

  Security   Android

• Duress

  by lucky · Free · fdroid

  Duress password trigger

  Security   Android

• DuressKeyboardLite

  by fdroid · Free · fdroid

  Keyboard with DuressPassword feature.

  Security   Android

• e-Passport Reader

  by Anton Tananaev · Free · fdroid

  use the NFC chip to communicate with an electronic passport

  Security   Android

• Encrypt Text

  by fdroid · Free · fdroid

  Minimalistic application to encrypt plain text using AES 256.

  Security   Android

• End of Updates Checker

  by trapplab · Free · fdroid

  Check until when your phone gets updates.

  Security   Android

• EphemeralWorkProfile

  by fdroid · Free · fdroid

  Profile owner Android privacy app.

  Security   Android

• ESUP-NFC-TAG-DROID

  by fdroid · Free · fdroid

  ESUP-NFC-TAG-DROID works as a client of an ESUP-NFC-TAG server. Android 5 (or +)

  Security   Android

• Fahrraddiebstahlwarnung

  by RHeimb · Free · fdroid

  Bicycle thefts and accidents in Berlin

  Security   Android

• Fake Contacts

  by Bill Dietrich · Free · fdroid

  Create fake phone contacts, for data-poisoning.

  Security   Android

• Fauxx - Privacy Through Noise

  by digital-grease · Free · fdroid

  Poison data collection profiles by generating decoy signals.

  Security   Android

• FMD edge

  by fdroid · Free · fdroid

  Locate and control your device remotely

  Security   Android

• GPS Setter

  by jqssun · Free · fdroid

  A GPS setter based on the Xposed framework.

  Security   Android

• Guerrilla Mail

  by TheOneWithTheBraid · Free · fdroid

  Quickly receive anonymous and temporary mails.

  EmailSecurity   Android

• Hash Droid

  by Hobby One · Free · fdroid

  Verify file integrity

  Security   Android

• Haven

  by Kenneth-Cho-InfoSec · Free · fdroid

  Isolate and run multiple instances of apps using Work Profiles

  Security   Android

• HiddenProtectedWorkProfile

  by fdroid · Free · fdroid

  Hidden Profile owner Android security app.

  Security   Android

• Hypatia

  by Divested Computing Group · Free · fdroid

  A real-time malware scanner

  Security   Android

• Inter Profile Sharing

  by Ventral Digital LLC · Free · fdroid

  Easily share media and text between Android user profiles

  Security   Android

• IsPhoneEncrypted

  by Marco Seguri · Free · fdroid

  Check if the disk is fully encrypted

  Security   Android

• IYPS - Is Your Password Secure?

  by StellarSand · Free · fdroid

  Evaluate passwords, predict crack times, and get tips for stronger passwords.

  Security   Android

• k3pler

  by Orhun · Free · fdroid

  Network connection blocker and packet analyzer

  Security   Android

• KeePassVault

  by Aleksey Ivanovsky · Free · fdroid

  Client app for KeePass databases

  Security   Android

• KeyPass

  by Yogesh Choudhary Paliyal · Free · fdroid

  Offline, Secure, Private

  Security   Android

• Knock on Ports

  by Alexander Yaburov · Free · fdroid

  A powerful client to manage and run port knocking sequences

  Security   Android

• Krautschlüssel

  by Philipp Matthias Schäfer · Free · fdroid

  Control Krautspace's door

  Security   Android

• KryptEY

  by amnesica · Free · fdroid

  Keyboard for secure E2EE communication through signal protocol in any messenger

  Security   Android

• KyuubiMask - Privacy First

  by soraiyu · Free · fdroid

  Privacy-focused notification masking for screen sharing and presentations

  Security   Android

• LineShield

  by Six-Seven · Free · fdroid

  Verify phone lines registered to your name in Mexico CRT portals

  Security   Android

• Mauth

  by Xinto · Free · fdroid

  A Material You Two-factor Authentication app.

  Security   Android

• mcp_reverse_engineering

  by ronilowtoned410 · Free · github

  Analyze binaries with a sandboxed MCP tool that unifies reverse engineering utilities and adds filesystem isolation, timeouts, and input checks

  AISecurityDeveloper Tools   Android

• MemoryGuardian

  by fdroid · Free · fdroid

  Take Control of Your Clipboard

  Security   Android

• MetaPurge

  by fdroid · Free · fdroid

  Locally strip sensitive EXIF/metadata from your photos.

  Security   Android

• Mooltifill

  by Bernhard Rauch · Free · fdroid

  Use the Android Autofill service with the Mooltipass BLE hardware authenticator

  Security   Android

• Motion Eye

  by fdroid · Free · fdroid

  Stream and connect all of your Surveillance network cameras

  Security   Android

• Motion-UI

  by lbr38 · Free · fdroid

  A web interface to manage your own NVR with motion.

  UISecurity   Android

• MotionLock

  by Divested Computing Group · Free · fdroid

  Keeps your device locked

  Security   Android

• mOTP

  by Chris Miceli · Free · fdroid

  One-time password generator

  Security   Android

• My Wifi Passwords

  by fdroid · Free · fdroid

  View your Wi-Fi Passwords

  Security   Android

• NC Passwords

  by joleaf · Free · fdroid

  A password manager app for Nextcloud's Passwords app

  Security   Android

• NewPass

  by Gero · Free · fdroid

  Securely store and manage passwords of your digital realm with NewPass.

  Security   Android

• Nextcloud Passwords

  by Hèctor Godoy · Free · fdroid

  Secure app for viewing passwords for the Nextcloud Passwords app

  Security   Android

• Note Crypt Pro

  by fdroid · Free · fdroid

  Keep your notes safe and secure

  SecurityEncryption   Android

• Oblivion

  by fdroid · Free · fdroid

  Remote lock and wipe triggers for compromised or unattended devices.

  Security   Android

• OcyShield-Framework

  by lucioloprey · Free · github

  Audit Android systems with this modular framework for security testing, payload deployment, and session management.

  AutomationSecurityTesting   PythonAndroid

• Ojo RTSP IP Camera viewer

  by Daniele Verducci · Free · fdroid

  Ojo is a basic IP Camera surveillance wall.

  Security   Android

• OkcAgent

  by fdroid · Free · fdroid

  Make OpenKeychain available in your Termux shell

  Security   Android

• Olvid

  by Olvid · Free · fdroid

  Private messaging for everyone

  VoiceMessagingSecurity   Android

• open2share

  by 双霖 · Free · fdroid

  Enable sharing files from every app (like WeChat)

  Security   Android

• OpenDNS Updater

  by Guillaume Villena · Free · fdroid

  OpenDNS Updater is an extremely easy to use android app to perform IP updates.

  Security   Android

• OUI Lookup and Database

  by Alberto Pedron · Free · fdroid

  Find a device's manufacturer by its MAC address and browse OUIs assignments

  DatabaseSecurity   Android

• Password Monitor

  by StellarSand · Free · fdroid

  Ensure your password safety by scanning for potential breaches.

  Security   Android

• Password Store

  by Alexander Grahn · Free · fdroid

  Manage your passwords

  Security   Android

• Password Store (Passkey Edition)

  by pando85 · Free · fdroid

  Manage your passwords

  Security   Android

• Passwords

  by CodeSpire Solutions · Free · fdroid

  Local Material 3 Password Manager.

  Security   Android

• PayNoWay

  by Charles Hill · Free · fdroid

  Bitcoin wallet app made to test payment systems against double-spend attacks.

  EconomySecurity   Android

• Permissions Manager

  by Sultanahamer · Free · fdroid

  Warns user about dangerous permissions given to installed apps

  AuthorizationSecurity   Android

• Photok

  by Leon Latsch · Free · fdroid

  Private Photo Vault, Hide Photos & Videos.

  Security   Android

• PINcredible - Secure PIN vault

  by Cyb3rKo · Free · fdroid

  Modern and secure Android app to help you remember any PIN

  Security   Android

• PluckLockEx

  by 0xFireball · Free · fdroid

  Lock your phone when snatched

  Security   Android

• Port Authority

  by Aaron Wood · Free · fdroid

  Port scanner

  Security   Android

• Port Knocker

  by Darnell Andries · Free · fdroid

  Port knocker client; supports one time sequences

  Security   Android

• Port Knocker

  by fdroid · Free · fdroid

  Port Knocker Client

  Security   Android

• Privacy Flip

  by Doru Moraru · Free · fdroid

  Manage your device privacy based on lock/unlock state

  Security   Android

• Privacy Indicators

  by Nitish Gadangi · Free · fdroid

  Get notified every time an app or a service uses camera or microphone

  Security   Android

• PrivacyBreacher

  by DataBurn · Free · fdroid

  showcase privacy issues in Android

  Security   Android

• PrivacyScanner

  by xabd · Free · fdroid

  scan installed apps and highlight privacy risks by analyzing their permission

  Security   Android

• Privamatic

  by Techtrest · Free · fdroid

  Privacy score for your Android — 45+ checks, no cloud, no tracking.

  Security   Android

• Private Lock

  by fdroid · Free · fdroid

  Lock your phone from its movement force

  Security   Android

• ProtectedWorkProfile

  by fdroid · Free · fdroid

  Profile owner Android security app.

  Security   Android

• Pushie

  by Chesire · Free · fdroid

  Provides temporary, secure, password sharing

  Security   Android

• Quad9 Connect

  by Quad9 · Free · fdroid

  Android application for Quad9 recursive DNS cybersecurity and privacy services

  Security   Android

• QuickSE

  by maazm7d · Free · fdroid

  QuickSE lets rooted Android users view and change SELinux mode easily.

  Security   Android

• Rivia

  by Emir Zakrewski · Free · fdroid

  Rivia is the ultimate encryption tool

  Security   Android

• RKNHardering

  by xtclovver · Free · fdroid

  Detects VPN and proxy usage on Android using RKN methodology

  Security   Android

• Router Keygen YoloSec

  by fdroid · Free · fdroid

  Generate default WPA/WEP keys

  Security   Android

• Ruam Mij

  by Akexorcist · Free · fdroid

  Suspicious app scanner with privacy respects

  Security   Android

• Safe Space

  by fdroid · Free · fdroid

  A safe space for your digital valuables.

  SecurityEncryption   Android

• Salasana

  by Xavier Vello · Free · fdroid

  Generates site-specific unique passwords

  Security   Android

• Secret Space Encryptor (SSE)

  by Paranoia Works · Free · fdroid

  File Encryption, Text Encryption (Messages, Notes, …), Secure Password Manager

  SecurityEncryption   Android

• Secur: Cross-platform 2FA client

  by SphericalKat and shamith16 · Free · fdroid

  A beautiful, cross-platform 2FA TOTP client written in Flutter

  Security   FlutterAndroid

• Secure photo viewer

  by Gree Tech Prog · Free · fdroid

  A media-viewer that functions ontop of your lockscreen

  Security   Android

• Secure QR Share

  by Jonathan Drolet · Free · fdroid

  Share passwords and links securely via encrypted QR codes.

  Security   Android

• SecureOTP - Universal OTP Extractor

  by Jatin · Free · fdroid

  Auto-detect and copy OTP codes from SMS, Email, and app notifications

  Security   Android

• SecureScreen

  by Adi K · Free · fdroid

  Protect selected apps from screenshots and screen recording

  Security   Android

• SecureYourChats

  by R00tedBrain · Free · fdroid

  Text & File Encryption/Decryption with new OverlayTechnology

  SecurityEncryption   Android

• SeekPrivacy

  by seeker · Free · fdroid

  Activist-Grade Defense Against System-Level Data Surveillance

  SecurityEncryption   Android

• SELinuxModeChanger

  by fdroid · Free · fdroid

  Set SELinux mode on boot

  Security   Android

• Sentinel Lens

  by fdroid · Free · fdroid

  Facial recognition surveillance with alerts

  Security   Android

• Sentry

  by lucky · Free · fdroid

  Enforce security policies

  Security   Android

• SharedHaven

  by fdroid · Free · fdroid

  Bitcoin wallet with secure multisig features

  EconomySecurity   Android

• Sidestep

  by blankdotdev · Free · fdroid

  Intercept URLs, remove tracking, and redirect to privacy-friendly frontends.

  Security   Android

• Signet

  by digital-grease · Free · fdroid

  Verify calls from family, colleagues, sources against deepfake impersonation.

  Security   Android

• Simple Text Crypt

  by Aidin Gharibnavaz · Free · fdroid

  Encrypts plain text using AES256

  Security   Android

• Skewy - anti eavesdropping

  by Skewy · Free · fdroid

  A tool to prevent eavesdropping and ultrasonic access of your smart phone.

  Security   Android

• SmartFind

  by ErinyLTD · Free · fdroid

  Find your phone with an SMS from a trusted contact

  Security   Android

• SnapSafe

  by Wavesonics · Free · fdroid

  Snap pics of anything, safely.

  Security   Android

• SOS Alerter

  by Dhilip · Free · fdroid

  Privacy-focused emergency app with SMS location tracking and silent recording.

  Security   Android

• SQRL Login

  by Daniel Persson · Free · fdroid

  An implementation for SQRL (Secure Quick Reliable Login)

  AuthenticationSecurity   Android

• SshDaemon

  by Tibor Tarnai · Free · fdroid

  Simple ssh/sftp server without root.

  Security   Android

• StartFlagExploit

  by ChickenHook · Free · fdroid

  Affected Android versions: Android 10 / Android 11

  Security   Android

• strongSwan VPN Client

  by fdroid · Free · fdroid

  An easy to use IKEv2/IPsec-based VPN client.

  Security   Android

• TinyKeePass

  by Shell Chen · Free · fdroid

  Another simple read-only KeePass app

  Security   Android

• Tokn - MFA / 2FA authenticator

  by fthomys · Free · fdroid

  Open-source 2FA authenticator. Encrypted on-device. No accounts.

  Security   Android

• TorServices (alpha)

  by Guardian Project · Free · fdroid

  The simplest, fastest, smallest Tor proxy app (early test release)

  Security   Android

• TrashDroid

  by Genuslycopusselfexpression425 · Free · github

  Automate comprehensive Android app security testing with TrashDroid using adb, drozer, and apktool for a full nine-phase dynamic analysis.

  AutomationSecurityTesting   PythonAndroid

• Trigger

  by fdroid · Free · fdroid

  Open doors via Wi-Fi using HTTPS/SSH.

  Security   Android

• Truvark

  by Lukas Pieper · Free · fdroid

  A multi-vault file encryption app that respects your privacy.

  SecurityEncryption   Android

• User-controlled decryption operations

  by Erik Nellessen · Free · fdroid

  Emulates a smart card and lets you control the decryption operations

  Security   Android

• Valentin's PowerTools #002 - Passwords to remember

  by Valentin · Free · fdroid

  Generates human speakable and readable passwords

  Security   Android

• Valv

  by Arctosoft AB · Free · fdroid

  An encrypted gallery vault for Android devices

  SecurityEncryption   Android

• Vault

  by arsvechkarev · Free · fdroid

  Simple, secure and fast password manager compatible with KeePass

  Security   Android

• Vernet - Network Analyzer

  by Elliot Alderson · Free · fdroid

  Host and Port scanner. Ping IP or domain.

  Security   Android

• Wasted

  by lucky · Free · fdroid

  Lock a device and wipe its data on emergency

  Security   Android

• Watt

  by tuyafeng · Free · fdroid

  Disable or enable components(receivers/services/activities) easily

  Security   Android

• WG Auto Connect

  by Mario Noll · Free · fdroid

  Auto connect to a WireGuard tunnel

  Security   Android

• WiFi Password Manager

  by Khh-vu · Free · fdroid

  Simple app using Shizuku or root access to manage WiFi passwords

  Security   Android

• WiFiScanner

  by fdroid · Free · fdroid

  Analyse the WiFi networks in range.

  Security   Android

• Xray

  by SaeedDev94 · Free · fdroid

  Xray GUI Client For Android

  Security   Android

• YubiClip XOR

  by craftxbox · Free · fdroid

  Present static passwords over NFC securely from your NFC enabled Yubikey.

  Security   Android