The Phibro Animal Health Corporation calculator app is a platform for calculators created by Phibro Animal Health Corporation for use by internal and external users. The current Terramycin calculator helps users calculate the amount of Terramycin needed as a fish feed additive. The app is designed as a platform on which other calculators can be added and accessed by users. There is a login for employees that goes through Microsoft Single Sign on and a registration process for non-employees.