Phone & SMS
Session F-Droid
Encrypted private messenger
Element - Secure Messenger
Group messenger - encrypted messaging, group chat and video calls
Meshenger
P2P voice- and video phone App.
baresip
VoIP User Agent app for Android based on baresip SIP library
baresip+
VoIP User Agent app for Android based on baresip SIP library
Cheogram
Chat on the Jabber network (XMPP protocol); focus on features for gateway users
SimpleX Chat
SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!
Simlar - secure calls
Protect your privacy with encrypted phone calls.
Linphone - open source SIP client
SIP (VOIP) phone
Jami
Secure and distributed communication platform
SMS to URL Forwarder
simple incoming SMS to URL forwarder
OpenContacts
A different database for contacts to keep them private only to you.
QKSMS
Messaging app
Simple Contacts Pro
Contacts address book for managing recent contacts and vcf contact backups
Jitsi Meet
Instant video conferences efficiently adapting to your scale
FluffyChat
Chat with your friends with FluffyChat.
Privacy Cell
Verify that a phone is using the most secure cell protocols.
SMS Import / Export
Imports and exports SMS and MMS messages, call logs, and contacts.
SchildiChat
Secure messenger for Matrix with a traditional instant messaging experience
Sipdroid
A SIP (VOIP) client
AirMessage
Use iMessage on your Android phone! (Mac computer required)
SMS Forward
SMS Forward is a simple app that allows you to redirect SMS.
Watomatic - Auto Reply For WhatsApp
Auto reply bot for WhatsApp, FB Messenger and more soon
FindMyDevice
Locate your smartphone via SMS when it gets lost
Wire • Secure Messenger
Wire offers highly secure communication – anywhere and anytime.
Silence
Block unknown callers
kMeet
Free and secure videoconferencing solution
Text Torch
Shine a light on your texting behavior
Vibe
Vibrate on a call answer or end
Flash Alert - Call and Message
Blink the terminal when receiving a call, SMS or an application notification
