# PD Meter: Pupillary Distance — Measure PD for Glasses Online

> Measure pupillary distance for online glasses using your phone camera and a card. (iPhone/iPad app by heekyung moon.)

- Source: https://appshunter.io/ios/app/pd-meter-pupillary-distance/id6784830581 (this page in markdown: same URL + `.md`)
- Developer: [heekyung moon](https://appshunter.io/developer/6779193748)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 17+
- Requires: iOS 16.4 · 67 MB
- Languages: American English
- Released: 2026-07-01
- Data updated: 2026-09-01
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/pd-meter-pupillary-distance/id6784830581/reviews.md

## What is PD Meter?

Ordering glasses online and need your PD? PD Meter helps you measure your pupillary distance (PD) in millimeters using a front-camera selfie and any standard-size card, like a credit card, for scale — no ruler, no second person, no trip to the optician.

Your pupillary distance is the gap between the centers of your pupils. Online eyewear stores ask for it so your lenses are centered correctly in the frame. PD Meter gives you a quick, repeatable estimate from the comfort of your home.

HOW IT WORKS

• Hold a standard card (a credit card, ID or any ISO-size card) under your eyes — its known width gives the app a real-world scale.
• Take a front-camera selfie, looking straight at the lens.
• Mark the center of each pupil and the edges of the card.
• PD Meter converts pixels to millimeters and shows your PD instantly.

WHAT YOU GET

• PD in millimeters, ready to enter at checkout.
• Single (binocular) PD, the value most retailers request.
• A clear, guided flow with on-screen tips for good lighting and head position.
• Re-measure as many times as you like and average your results for confidence.

WHO IT'S FOR

Anyone buying prescription or blue-light glasses online, parents checking a child's fit, or anyone who simply wants their PD on hand without booking an appointment.

A NOTE ON ACCURACY

PD Meter provides an estimate based on your photo and the card scale. Results depend on lighting, camera angle and how precisely you place the markers. For high prescriptions or progressive lenses, confirm your PD with an optician. This app is not a medical device.

## Key features

- Measure PD with phone camera
- Use standard card for scale
- Get PD in millimeters
- Guided measurement process
- Repeatable results for confidence
- Single (binocular) PD measurement


## Frequently asked questions about PD Meter

### How do I measure my PD with PD Meter?

Hold a standard card under your eyes, look into your phone's front camera, and tap to mark the center of each pupil and the edges of the card. PD Meter then calculates your pupillary distance in millimeters.

### What is PD Meter used for?

PD Meter is used to measure your pupillary distance (PD), which is required by online eyewear stores to ensure your lenses are centered correctly in the frames for prescription or blue-light glasses.

### Is PD Meter accurate for all prescriptions?

PD Meter provides an estimate that depends on lighting, camera angle, and marker precision. For high prescriptions or progressive lenses, it's recommended to confirm your PD with an optician.

### Does PD Meter have ads?

Yes, PD Meter contains advertisements. This allows the app to be offered for free to users.

### What devices does PD Meter support?

PD Meter is currently supported on iPhone devices.

### How often is PD Meter updated?

The latest version is 1.0.19, and the app was last updated on August 22, 2026. Update frequency may vary based on developer releases.

### What is the age rating for PD Meter?

PD Meter has an age rating of 17+, indicating it may contain content suitable for mature users.

### Can I average my PD results with PD Meter?

Yes, you can re-measure your PD as many times as you like and average your results within PD Meter to increase confidence in the measurement.

## Version history (last 5 releases)

### 1.0.19 — 2026-08-22

You can now rest the reference card on your forehead or your cheek — whichever lies flat against your face — for a steadier, more accurate measurement. The on-screen guide shows both spots, with clearer tips when the card isn't level with your eyes.

### 1.0.18 — 2026-08-18

Your PD now appears once you've marked four points — marking your nose bridge is optional and only adds the per-eye numbers. Points now land where you aim: press, drag to line it up in the magnifier, then let go. And if the camera was turned off by accident, there's now a way back to Settings.

Thanks for the reviews and feedback!

### 1.0.17 — 2026-08-17

Your measurement now checks itself: if the card looks tilted, marked on the wrong edge, or your face is too small in the photo, the app says exactly what to fix before you trust the number. The reading is always shown either way.

Thanks for the reviews and feedback!

### 1.0.16 — 2026-08-15

Fixed an interruption that could land right as you retook a photo, before you had a chance to see the measurement you just took.
Your PD result now settles on screen before anything else happens, so you can read it and check the frame fit without being rushed.
Stability fixes for devices that were closing the app during a measurement.

### 1.0.13 — 2026-08-14

Accuracy fixes from your reports.

• Results read slightly low: the reference card sits closer to the camera than your eyes, and the scale now accounts for that.
• Fine-tuning a marker moves it at a third of finger speed, so repeat measurements agree much more closely.
• Each result now shows its accuracy range.

Please re-measure — older results use the old calculation and are left out of your average.

## Apps similar to PD Meter

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Eye Measure-Ruler&,Distance,PD](https://appshunter.io/ios/app/eye-measure-ruler-and-distancepd/id6753977204) | 4.5 (15) | Free | Utilities |
| [Measure Face](https://appshunter.io/ios/app/measure-face/id6753777831) | — | Free | Utilities |
| [pupillary distance measure AR](https://appshunter.io/ios/app/pupillary-distance-measure-ar/id6739691886) | 4.0 (5) | Free | Utilities |
| [企商宝](https://appshunter.io/ios/app/id6458691350) | — | Free | Utilities |
| [Pupillary Distance: Vision PD](https://appshunter.io/ios/app/pupillary-distance-vision-pd/id6751781578) | 3.4 (10) | Free | Utilities |
| [PDgo: Pupillary Distance](https://appshunter.io/ios/app/pdgo-pupillary-distance/id6778687480) | — | Free | Utilities |

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All apps by heekyung moon: https://appshunter.io/developer/6779193748

## Related topics

[free pupil distance pd measure](https://appshunter.io/ios/topics/free-pupil-distance-pd-measure)

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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 2026-09-01.*