beta version
Refers to a pre-release version of software or a product that is feature-complete but may still have bugs. Used in computing and tech contexts.
I'm testing the beta version of this app.
There are still some bugs remaining in the beta version.
Uses the Greek letter β; common in technical contexts.
From English 'beta version', where 'beta' is the second letter of the Greek alphabet, used in software development to denote the second major testing phase.