Security

p≡p | Pretty Easy Privacy (pEp)

Read and write encrypted e-mails

Vernet

Host and Port scanner. Ping IP or domain.

Port Knocker

Port Knocker Client

Vigilante

Know when a third-party app uses your device camera/microphone

Stingle Photos

Stingle Photos is a secure, end-to-end encrypted gallery and sync app

KeyPass

Offline, Secure, Private

Standard Notes

A simple and private notes app

KeePassDroid

KeePass-compatible password safe

MotionLock

Keeps your device locked

andOTP

Time-based One-time Passwords (TOTP) from QR codes for two-factor authentication

IRMA

Authentication made easy, privacy-friendly, and secure

Briar

Secure Messaging, Anywhere

Status - Private Communication

Chat and transact securely

FindMyDevice

Locate your smartphone via SMS when it gets lost

Trigger

Open doors via Wi-Fi using HTTPS/SSH.

Hypatia

A real-time malware scanner

KeePassDX

Secure and open source password manager compatible with KeePass files.

PCAPdroid

No-root network monitor and traffic dump tool for Android devices

Knock on Ports

Port knocking client

Bitmask

Encrypted communication for mere mortals(superheroes welcome, too).

InviZible Pro: increase your security, protect you

Comprehensive application for on-line privacy and security

OONI Probe

Open Observatory of Network Interference (OONI)

Watt

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

Insular

Isolate your Big Brother apps

Aegis Authenticator

Free, secure and open source 2FA app to manage tokens for your online services

NC Passwords

A password manager app for Nextcloud's Passwords app

Password Generator (Privacy Friendly)

Generate passwords

Cryptocam - encrypting camera app

Take encrypted photos and video to protect sensitive information.

TrackerControl

TrackerControl allows to monitor and control hidden data collection in apps.

AFWall+

Control network traffic