About PDgo

PDgo is built by a small independent team with one goal: make getting your pupillary distance as easy as unlocking your phone.

What we make

The PDgo iOS app measures PD with the iPhone's TrueDepth 3D camera: total and per-eye values with a confidence rating, computed entirely on your device. This site also offers a free on-screen PD ruler, a printable PDF ruler, and plain-language guides about pupillary distance.

Our approach

We publish complete instructions for measuring PD by hand, free, because an informed reader is our best user. PDgo is a measurement reference for ordering eyewear; it is not a medical device, and we say so everywhere. For prescriptions and eye health, see your optometrist.

Contact

The fastest way to reach us is through the PDgo App Store page (App Support). Site privacy details are on the privacy page.