The Orchidometer app for iPhone

Measure and track testicular volume

The only digital


Determine Tanner stage. Diagnose Klinefelter Syndrome, Fragile X Syndrome and testicular atrophy. Track changes in testis size.

Track measurements

Measurements can be saved and visualized. Diagnose testicular atrophy over time.

Klinefelter Syndrome

Find out whether your testicular volume is associated with Klinefelter Syndrome.

Tanner stage

Use the app to determine Tanner stage based on the current testicular volume.

Fully customizable

The app can be customized to your needs. Each feature can be enabled or disabled.

Save your measurements

Tap the orchidometer to save a new measurement.

  • Measurements are stored securely on your device
  • Track changes in volume over time
  • Find out how your balls are affected by diet, exercise or TRT

Penis length

View the flaccid penis length for each Tanner stage.

  • Adjust the orchidometer's volume
  • Find the associated age and flaccid penis length
  • Metric and imperial ruler supported

Dark mode and iPad support

The Orchidometer app can be used on any iOS device and has a dark and light mode. It's available in English, Arabic, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish and Turkish.

Any questions?

Get the Orchidometer app now

Start measuring and tracking testicular volume on iPhone