is a professional statistical software package developed by LeOra Software LLC . It is primarily designed for scientists, students, and researchers in fields like toxicology and entomology to conduct probit or logit regression analyses on quantal response bioassays.

The software is widely recognized for its ability to calculate and determine confidence limits (CLs). This is critical for examining how living organisms respond to substances like insecticides, pesticides, and medicines. Key features include:

: The latest versions offer updated graphics for better data visualization.

: Handles binary response models with a single independent variable.

: Uses rigorous statistical models for analyzing dose-response data.

: Extends capabilities to multiple explanatory variables.