通话与短信
Linphone - open source SIP client
SIP（VoIP）电话
WiVeWa
Client for the WiVeWa system
Jami
Audio & Video Calls / Chat
Take Control of your Communication!
SimpleX Chat
SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!
FluffyChat
Chat with your friends with FluffyChat.
Jitsi Meet
即时视频会议可有效适应您的规模
Föhnix
Foehnix 天气部件旨在帮助飞行员应对天气状况
Simple Contacts Pro
用于管理最近联系人和 vcf 联系人备份的联系人通讯录
Cheogram
可加密、易於使用的 XMPP 即時訊息，為您的行動裝置設計
Session F-Droid
加密私人信使
Welefon
Phone with API
Find My Device (FMD)
Locate and control your device remotely
Meshenger
开源 P2P 通讯软件
Baby Phone
A pretend phone app for little people who want to practice talking to others.
SMS Import / Export
Imports and exports SMS and MMS messages, call logs, and contacts.
Simple Contacts Pro SE
Extended version of Simple Contacts Pro that supports separate address fields
Contacts Import
Import your CSV contacts from a desktop client without any cloud syncing.
SchildiChat
具有传统即时消息体验的 Matrix 安全信使
Element - 安全消息应用
群组消息应用——加密的消息传递、群组聊天和视频通话
Koler
uniquely stylized phone app with customizable features
baresip
VoIP User Agent app for Android based on baresip SIP library
baresip+
VoIP User Agent app for Android based on baresip SIP library
VoIP.ms SMS
Popular Android messaging app for VoIP.ms, a Canadian VoIP provider
Simlar - secure calls
Protect your privacy with encrypted phone calls.
SMS to URL Forwarder
simple incoming SMS to URL forwarder
OpenContacts
A different database for contacts to keep them private only to you.
SMS Forward
SMS Forward is a simple app that allows you to redirect SMS.
QKSMS
消息应用
Privacy Cell
Verify that a phone is using the most secure cell protocols.
Sipdroid
SIP（VoIP）客户端
