Check if your testicular volume is normal with the Orchidometer app. Find out if your volume is associated with Klinefelter syndrome, Fragile X Syndrome or testicular atrophy.

Measure testicular volume with the Orchidometer for iPhone. The orchidometer is highly customizable and automatically adjusts itself to your screen size. It can be used to estimate Tanner stage, age and pubertal development.

Measurements can be saved and visualized for both testicles. The Orchidometer app can be used to track the testicle’s volume while on TRT or when you suffer from testicular atrophy, low testosterone or infertility. The app can also be used as an indication for Klinefelter syndrome.

Whether you're an endocrinologist, pediatrician or just interested in measuring testicular volume: this app will replace your classic orchidometer.

This mobile app is intended for informational, educational and research purposes only. It is not, and is not intended, for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease, in man or other animals. Seek a doctor’s advice in addition to using this app before making any medical decisions. Health care providers should exercise their own independent clinical judgment when using the mobile app in conjunction with patient care.

What’s New

Version 1.9.3

We improved the translations and added support for Hebrew.

Ratings and Reviews

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App Privacy

The developer, Ivar van Wooning, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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