# Pupil Distance PD Express — Instant Pupil Distance Measure

> Instant, accurate pupillary distance measurement using TrueDepth camera. (iPhone/iPad app by Tech Positive.)

- Source: https://appshunter.io/ios/app/pupil-distance-pd-express/id1438873499 (this page in markdown: same URL + `.md`)
- Developer: [Tech Positive](https://appshunter.io/developer/580207852)
- Category: Medical, Health & Fitness
- Price: $4.99
- Rating: 4.50/5 from 98 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 1 MB
- Languages: American English
- Released: 2018-10-28
- Data updated: 2026-08-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pupil-distance-pd-express/id1438873499/reviews.md

## What is Pupil Distance PD Express?

● 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

## Key features

- Instant measurement
- No cards required
- No steps involved
- Highly accurate
- Detects pupils automatically
- Provides distance and reading PDs

## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/pupil-distance-pd-express/id1438873499/reviews.md

### 4/5 — Great to have

*2024-08-13*

As the online optical industry grows, its great to have an accurate way to measure PD. No more guesswork. Thank you.

### 5/5 — My Screen is Black

*2024-06-14*

Help! I have been using your app for a few years and it recently started displaying a black screen.  I have uninstalled and reinstalled it several times, this seemed to have temporarily fixed the issue. It has since reverted to permanently showing a black screen when I open the app. I tried to contact you through your tech support feature, to no avail. 
Thanks!

### 2/5 — No instructions at all

*2023-06-18*

There are no instructions at all. Yes it is easy to just open the app and use it but each time im getting different readings. Is there a distance I should be doing the measurement from. When I try to get help from the app support it just takes me to a generic web page.

### 1/5 — Not accurate

*2022-04-14*

Not accurate

### 1/5 — Not supported when stated it was

*2022-02-24*

I paid $10 to purchase this app after looking at the specs to make sure it was supported on my device only to be immediately given a screen stating it was not supported. Under compatibility it clearly states it is compatible but I’m guessing I’ll get a robot response to this review stating that it does not state that as in an earlier review I noticed.

### 1/5 — Bull excreta

*2020-04-23*

Description says works with 6s. 
It does not.

**Developer response:** As our app description says, app works with iPhone X or later.

### 1/5 — Said it was compatible with my phone and iPad, but was not

*2020-04-10*

Compatibility section mentioned my iPhone 8 Plus and iPad 6th gen models. Once I paid and installed it, I found out it is not compatible. I paid for the app because the free ones said that I needed an iPhone X. Not happy at all.

**Developer response:** As our app description says, app works with iPhone X or later.

### 2/5 — Constant Ratings Nag - wild measurement results swing

*2019-09-02*

Constantly NAGS to give App Store rating ... not sure about accuracy, keeps giving readings that are between 3mm apart.  Other free “Eye Measure App” got closer to in-store doctor measurements.  Measured with glasses on and with glasses off.  Using iPhone X.

**Developer response:** We take pride in total customer satisfaction. Please email us at support@techpositive.co and let us know the problem you are facing with the app and we will be happy to help you resolve it.

### 1/5 — Warning needed

*2019-08-11*

The description says that you need an iPhone X (which I have) but does not explain that Face ID is used (mine doesn’t work). Wasted $3.

**Developer response:** Sorry to hear that the app is not up to your expectation. What error are you getting when trying to use the app? Please email us at support@techpositive.co and we will make it right.

### 5/5 — Easy!

*2019-08-02*

Very easy to use! Other apps seemed complicated; glad I chose this one. It does all the work for you.

**Developer response:** Thank you for your kind words. We are always working to make the app better.

## Frequently asked questions about Pupil Distance PD Express

### What is Pupillary Distance (PD) and why do I need it?

Pupillary Distance (PD) is the distance between the centers of your pupils in millimeters. This measurement is crucial for accurately fitting prescription eyeglasses and prescription Virtual Reality (VR) headsets, ensuring they are centered correctly for optimal vision and comfort.

### How does this app measure my pupillary distance?

The app utilizes your device's advanced TrueDepth front-facing camera to automatically detect your pupils. It then calculates and provides your pupillary distance in under one second, offering both distance and reading PD measurements.

### Is this app free to use?

Yes, this application is completely free to download and use. There are no in-app purchases or advertisements to disrupt your experience.

### What devices are compatible with this app?

This app requires a device equipped with a TrueDepth front-facing camera. It is compatible with iPhone X, XS, XR, XS Max, and later models, as well as iPad Pro 3rd Gen (2018) and later models.

### Can I use this app to get a prescription for glasses?

While this app accurately measures your pupillary distance, which is a key component for prescription glasses, it does not provide a full eye examination or prescription. You will still need to consult with an eye care professional for a comprehensive eye exam and prescription.

## Version history (last 4 releases)

### 1.1.2 — 2026-05-07

- Minor bug fixes.

### 1.1.1 — 2022-10-11

Bugfixes & Improvements.

### 1.1 — 2019-02-25

● 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.

### 1.0 — 2018-10-27

No release notes.

## Apps similar to Pupil Distance PD Express

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*