● No cards needed ● No steps involved ● Highly accurate
Just open the app and get your PD in under 1 second.

PD, Pupil Distance or Pupillary Distance, is the distance between the center of your pupils in millimeters. This measurement is required for making prescription eyeglasses and prescription Virtual Reality (VR) Headsets.

The app will automatically detect your pupils and provide you with your distance and reading PDs.

This app requires a device with a TrueDepth front-facing camera. It is only available for:
● iPhone X, XS, XR, XS Max, and later models
● iPad Pro 3rd Gen 2018 and later models

What’s New

Version 1.1

● We have revamped the app layout for better usability.
● Now you can tap anywhere on the screen to take the measurement.
● Improved color scheme for better readability on lighter backgrounds.
● The app is now available on iPad Pro with TrueDepth Camera (3rd Generation, 2018)
● Other bug fixes and enhancements.

Ratings and Reviews

4.5 out of 5
39 Ratings

39 Ratings

Applez university ,

Easy to use

Excellent app! It was easy to use and it matched the same measurements I just received at the optometrist.

Dgabriel610x ,

Simple and pretty accurate

Simplifies getting your PD. It was off by 1/2 mm from my optician’s reading at first but after multiple passes it matched about 1/2 the time.

Popstar Dad ,

ONLY WORKS WITH iPhone X!!! Don’t waste your $

Only AFTER I bought this does it warn that it won’t work on my iPhone 8. Poor execution.

Developer Response ,

We are sorry to hear that your phone is incompatible with the app.
App description clearly states the phone models, this app will work with.
Please contact Apple for a refund of your payment in this case.


Tech Positive Inc.
9 MB

Requires iOS 12.0 or later. Compatible with iPhone 6S, iPhone 6S Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, iPad Pro (9.7‑inch), iPad Pro (9.7-inch) Wi‑Fi + Cellular, iPad (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5‑inch), iPad Pro (10.5-inch) Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch), iPad Pro (12.9-inch) Wi‑Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi-Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, and iPod touch (7th generation).



Age Rating
Rated 4+
© Tech Positive


  • Family Sharing

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

More By This Developer

You May Also Like