PD+ : Easy Pupillary Distance

Name: PD+ : Easy Pupillary Distance
Rating: 4.7 (523 reviews)
Author: Zernike LLC

By: Zernike LLC App

Measure PD & Seg Height

Overview

Version:

1.8.0

Last updated: 2026-07-28

Ranking

#71,100 ▲ 221

Overall

Features & Capabilities

PD+ instantly measures pupillary distance (PD) from a high-resolution facial photo. It provides near and far PD in binocular and monocular modes, with no additional cost. For compatible devices, it also calculates fitting height for frames to ensure lenses are properly centered for optimal vision. Fitting Height is supported on devices with TrueDepth or LIDAR cameras.

Calculators included in PD+ cover Rx Transposition, Vertex Adjustment, Crossed Cylinders (over-refraction), Keratometry Conversion, Visual Acuity Scale, Estimated Visual Acuity, Minimum Blank Size (MBS), and Simple Magnifier and Spectacle Magnifications, enabling a comprehensive eyewear fitting workflow.

User Growth & Download Statistics

App Photography Education

By:

Zernike LLC

Rating:

4.70

(523) 5 new ratings

Version:

1.8.0 Last updated: 2026-07-28

Version code:

885097367

Creation date:

2022-08-23

Compatible devices:

Size:

75.93MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-09-03

Compare stats and ranking:

Ranking

# 71,100 ▲ 221

For Developers

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Contact the developer

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Developed by:

Zernike LLC

Apple Apps Store

https://apps.apple.com/us/app/pd-easy-pupillary-distance/id1560353383

User Reviews

Users largely praise the app for ease of use, quick PD checks, and features like voice instructions and seg height measurements. A recurring theme is unreliable accuracy: many reviews report inconsistent results across attempts and significant deviation from optician measurements (off by 4–6 mm, 20% off). Several caution against using it for prescriptions, and a few report crashes or inaccurate frame-size guidance. Overall, it’s convenient but not dependable for professional eyewear prescriptions.

Pros

Accurate and precise PD measurements.
User-friendly and easy to use interface.
Convenient for pocket on-the-go PD checks.
Voice-guided instructions for measuring.
Includes seg height measurement.

Cons

PD results are often inaccurate and vary across attempts.
Not reliable for prescription decisions; should be verified by an optician.
Results frequently do not match optician’s measurements.
App stability issues (crashes).
Frame size recommendations can be inaccurate.

Recent reviews

This app is incredibly misleading and functionally broken. I downloaded this because I’m trying to order my very first pair of glasses. I spent an hour perfectly lit by a ring light, adjusting the phone's position back and forth because it kept giving me ridiculous strings of numbers like 5286, 6491, and 7735. The consistent error message at the top stating “fail” with the words "frame size" below it. What was I to think other than I’m out of frame? I’m not positioned correctly after spending an hour plus trying. I was fed up. Finally, I saw an option to upload a photo in the settings. But when I went to use it, the app forced me to pay a $7.99 "lifetime membership" fee for this "advanced feature." I begrudgingly paid it. I submitted my perfectly lit photo, and the app instantly rejected it because I wasn't wearing glasses. The whole point of the app is to get measurements so you can buy my FIRST pair of glasses, and their own promotional images literally show a little girl taking her PD without them! I don't own glasses yet! I deleted the app. Waited for the charge to clear. Then I contacted Apple, and they denied my refund, saying the purchase was ineligible for a refund. “This decision is final." Not eligible? Even though the app is completely unusable for its advertised purpose. Absolutely awful experience. Save your money and do not download this.