: Older documentation and guides still exist for versions like Zoiper 2.0 Biz

When users look for a of Zoiper, they are usually looking for the "Zoiper Free" edition, which is ad-supported but provides core functionality without time limits. The term "top" in the keyword indicates a demand for the highest-quality, safest, and most feature-complete version of the free client.

For most home users and freelancers, the is perfectly adequate. The missing codecs (like G.729) only matter if you have very low bandwidth.