About this app
The Bioavailable Testosterone calculator calculates bioavailable and free testosterone from total testosterone, sex hormone binding globulin (SHBG) and albumin. It is intended to be used by qualified healthcare professionals. The application is an adaptation of the algorithm published in Vermeulen A, Verdonck L, Kaufman JM: A Critical Evaluation of Simple Methods for the Estimation of Free Testosterone in Serum, J. Clin. Endocrinol. Metab. Oct 1, 1999; 84: 3666-3672.
Latest release
What’s New
Completely rebuilt for modern iOS. New interface, same trusted Vermeulen algorithm.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 11, 2026 · 9:00 PM Free
Screenshots
