# PD Meter

> AI-powered app for contactless interpupillary distance measurement. (iPhone/iPad app by 杭州美戴科技有限公司.)

- Source: https://appshunter.io/ios/app/pd-meter/id1497268134 (this page in markdown: same URL + `.md`)
- Developer: [杭州美戴科技有限公司](https://appshunter.io/developer/1123653009)
- Category: Utilities
- Price: Free
- Rating: 2.00/5 from 4 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 93 MB
- Languages: English, Chinese
- Released: 2020-02-27
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pd-meter/id1497268134/reviews.md

## What is PD Meter?

MEIDAI Interpupillometer is the world's first app which using AI technology for binocular interpupillary measurement. Using it can avoid the risk that traditional handheld interpupillometers requiring doctors and users facing each other in a extreme close distance (approximately 20cm).

[Accuracy] 0.1mm
[Result error] 0.3-0.5mm
[Tips for use] For FPD measurement, focus at least 4 meters away. For NPD measurement, please follow the "distance reminder".
[Steps]
(1) Adjusting the face to the camera
(2) Keep your face steady when prompted
(3) Focus distance required to adjust sight
* Use interpupillary distance for distance, look beyond the "tip arrow" to see the distance
* Close to interpupillary distance, focus on "tip arrow" camera
(4)) Click [Measure] to get interpupillary results
(5) The errors in AI's pupil recognition can be corrected manually.

For further technical support from professional organizations, please contact us:
WeChat: 13957778558
Email: support@meidaitech.com
Official Website: https://www.meidaitech.com

## Key features

- AI-powered binocular interpupillary measurement
- Contactless measurement method
- High accuracy (0.1mm)
- Manual error correction
- Supports FPD and NPD measurements

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/pd-meter/id1497268134/reviews.md

### 1/5 — A depth sensor is required to continue.

*2022-04-13*

Don’t know what that is, I assume it’s only on newer iPhones. Should mention this in the text before downloading.

### 5/5 — Best PD measurement app I could find.

*2021-06-10*

I like that this app allows you to take a picture and allows you to adjust bullseye circles over your pupils for precise measurement. You can also manually measure with a ruler in the app. I completed the measurement three times and was within 0.5 mm each time, so it is consistent and reliable. Much better than other apps that just spit out a number and don’t allow you to adjust measurements exactly over your pupils.

### 1/5 — Totally useless, don’t bother!

*2020-09-03*

I need to measure my eye PD for an glasses online purchase, so thought this app would be perfect. Not so. 
First you are required to agree to their terms and privacy, ok but it’s written totally in Chinese characters so goodness knows what I agreed to!
Then when I tried the app it can’t work as an error message says a distance measure is required, without saying what to do or where to get one. 
Totally useless, don’t bother!

### 1/5 — Don’t waste your time

*2020-05-16*

Does not even work

## Frequently asked questions about PD Meter

### What is PD Meter used for?

PD Meter is used for binocular interpupillary distance measurement utilizing AI technology. It provides a contactless way to obtain measurements with high accuracy.

### How accurate is PD Meter?

PD Meter boasts an accuracy of 0.1mm for interpupillary distance measurement, with a result error ranging from 0.3-0.5mm.

### Can PD Meter be used offline?

The provided description does not specify offline functionality. However, as a measurement tool, it is likely to require device camera access which may necessitate an internet connection for AI processing.

### Does PD Meter have ads?

No, PD Meter does not contain advertisements.

### What devices support PD Meter?

PD Meter is supported on iPhone, iPad, and iPod devices.

### How often is PD Meter updated?

The latest version, 2.1.1, was released on September 3, 2020. Further update frequency information is not available in the provided data.

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

PD Meter has an age rating of 4+, making it suitable for a wide range of users.

### What are the measurement tips for PD Meter?

For FPD measurement, focus at least 4 meters away. For NPD measurement, follow the 'distance reminder'. Ensure your face is steady and adjust focus distance as prompted by the app.

## Version history (last 4 releases)

### 2.1.1 — 2020-09-03

1、optimization algorithm

### 1.4.1 — 2020-08-03

fixed some bugs

### 1.3.0 — 2020-04-01

accuracy optimization of the PD resulte

### 1.2.0 — 2020-02-27

No release notes.

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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 2026-06-25.*