Security

SQRL Login
An implementation for SQRL (Secure Quick Reliable Login)

AdAway
AdAway is an open source ad blocker for Android using the hosts file.

FindMyDevice
Locate your smartphone via SMS when it gets lost

NC Passwords
A password manager app for Nextcloud's Passwords app

EteSync
Secure, private and end-to-end encrypted calendar, contacts and tasks sync

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

Insular
Isolate your Big Brother apps

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

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

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

Port Authority
Port scanner

WLANScanner
Analyse the WiFi networks in range.

KeePassDX
Secure and open source password manager compatible with KeePass files.

PilferShush Jammer
Block unwanted use of onboard microphone

Photok
Encrypt your photos on your device and keep them safe from others.

EteSync Notes
Secure, end-to-end encrypted, and privacy respecting note taking.

Port Knocker
Port knocker client; supports one time sequences

WireGuard
Next generation secure VPN network tunnel

LibreAV
A free and open-source anti-malware using machine learning

Tinc App
Android binding and user interface for the tinc mesh VPN daemon

ClassyShark3xodus
Scan apps for trackers

Mullvad VPN
Protect your online privacy with a fast, trustworthy, and easy-to-use VPN.

p≡p | Pretty Easy Privacy (pEp)
Read and write encrypted e-mails

FiSSH
SSH authentication via Fingerprint scanning over network (TLS Sockets)

Syphon
A privacy centric matrix client

OpenContacts
Hide contacts away from apps stealing your contacts information

OONI Probe
Open Observatory of Network Interference (OONI)

IVPN
Privacy focused VPN service with WireGuard

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

NetGuard
A simple way to block access to the internet per application