Zoiper Pro is the paid, feature-rich version of the popular Zoiper softphone app. It acts as a SIP and IAX2 client, allowing users to connect with various VoIP providers and PBX systems (like Asterisk, 3CX, or FreePBX). Unlike the standard free version, Zoiper Pro unlocks advanced features such as video calling, call recording, and an ad-free experience, making it the preferred choice for power users.
Zoiper is one of the few apps that supports both SIP and IAX2. While SIP is the industry standard, IAX2 is often preferred by technical users for its ability to bypass difficult firewalls and its lower overhead. Why Choose the Zoiper Pro APK over the Free Version? Zoiper Pro Apk