This app allows users to anonymously measure their digit ratios (2D:4D), a marker potentially related to prenatal hormone exposure. It collects data for research purposes, contributing to studies on personality and cognition.
1.0.2
December 14, 2017
This app has been updated by Apple to display the Apple Watch app icon. Updated detection algorithm and CSV export format.
MoreDigit Ratio is an app that allows users to anonymously measure their second-to-fourth digit ratio (2D:4D). This ratio is a marker studied for its potential relation to prenatal sex hormone exposure.
The app collects anonymous measurements of digit ratios and profile data, which may be sent to a server for research purposes. No images are sent.
The 2D:4D ratio is studied for its potential associations with cognitive abilities, impulsivity, aggression, risk-taking, and other personality traits. It is believed to reflect relative prenatal exposure to testosterone versus estrogens.
Yes, Digit Ratio is available for free. It does not have in-app purchases or advertisements.
Digit Ratio is supported on iPhone and iPod devices.
The latest version of Digit Ratio is 1.0.2, which was last updated on December 14, 2017.
Digit Ratio has an age rating of 4+.
Based on the available data, Digit Ratio has a rating of 1.5 stars from 2 ratings, suggesting a low user satisfaction.
