通話與簡訊
Jami
自由且私密地分享
baresip+
VoIP User Agent app for Android based on baresip SIP library
baresip
VoIP User Agent app for Android based on baresip SIP library
Session F-Droid
Encrypted private messenger
SpamBlocker (Call & SMS)
Spam Call/SMS blocker
Logger
Track, Analyze, and Manage Your Calls
QUIK SMS
Open source replacement to the stock SMS app on Android. A revival of QKSMS.
Element Classic
Previous generation Element
Launch Chat
Start a WhatsApp, Signal or Telegram chat without saving a number as a contact
Fossify Phone
使用 Fossify Phone 解鎖安全且開源的通話體驗
Infomaniak kMeet
Free and secure videoconferencing solution
Fossify Messages
開放原始碼且無廣告的 SMS/MMS 通訊應用程式
Fossify Contacts
私密且高效地管理您的聯絡人，支援(vCard)功能
SimpleX Chat
SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!
Parcel - Pickup code
Extract the address and pickup code from SMS automatically
Messages
A fast messaging app designed to make conversations simple and effortless
FluffyChat
SMS2Email
Forwards SMS messages to SMTP (Email) server
Wire • Secure Messenger
Wire offers highly secure communication – anywhere and anytime.
Contacts
An open-source, fully-functional contacts app
MsgGo
Open source, lightweight, and modern bulk SMS tool for Android.
ViewCarousel
Circular carousel of user configurable views
Call Limiter
Limit call duration per contact and automatically hang up when time is up
SmsReply
Automatic SMS replies with customizable templates
SMS 匯入 / 匯出
匯入與匯出簡訊、多媒體訊息、通話記錄和聯絡人。
JMP SIM Manager
Companion app for the JMP eSIM Adapter
Privacy Cell
Verify that a phone is using the most secure cell protocols.
Cheogram
Chat on the Jabber network (XMPP protocol); focus on features for gateway users
Deku SMS
Deku is an SMS app that supports end to end encryption and photo sharing
Linphone - open source SIP client
SIP（VoIP）電話
