PD Measure: Pupillary Distance
Monocular PD for Glasses
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Measure total and monocular PD on a compatible iPhone with 3D face tracking. Keep your eyewear reference data privately on your device.
Need your pupillary distance before ordering glasses?
PD Measure uses the front camera and 3D face tracking on compatible iPhone models to help you estimate total pupillary distance (PD) and left and right monocular PD. Follow the on-screen guidance to view your results and measurement quality in about 30 seconds.
Key Features
• Total PD: View the reference distance between both pupils
• Monocular PD: View left and right eye measurements separately
• 3D face tracking: Detect face position and eye alignment in real time
• Live guidance: Adjust distance and posture using on-screen feedback
• Measurement quality: Check whether the result is stable
• Local history: Save and compare measurement results on your device
Subscription
The app includes 10 free measurements. PD Pro unlocks unlimited measurements, complete history records, and future Pro features.
Payment is charged to your Apple Account when you confirm the purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in Settings → Apple Account → Subscriptions on your iPhone.
Privacy Policy:
https://pupil.mobiusring.cn/legal.html?lang=en#privacy
Terms of Use and Subscription Terms:
https://pupil.mobiusring.cn/legal.html?lang=en#terms
Privacy
https://pupil.mobiusring.cn/legal.html?lang=zh-Hans#terms
Terms of Use (EULA)：
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Camera frames and face-tracking data are processed on device in real time. They are not saved as photos or videos, uploaded to a server, or shared with third parties. Measurement results are stored only on your device and can be deleted at any time.
Important Notice
Results are for eyewear-fitting reference only and are not an optometric prescription, medical diagnosis, or treatment advice. For prescription eyewear, children’s eyewear, progressive lenses, or vision concerns, please consult a qualified optician or eye-care professional.
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The developer, MobiusRing, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Beijing Wuqiong Gongli Culture Communication Co., Ltd.
- Size
- 21.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 3 more
- English, Japanese, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- PD Pro 月度会员 $3.99
- PD Pro 季度会员 $9.99
- PD Pro 年度会员 $19.99
- Copyright
- © MobiusRing