Measures 3 mm lower than lens store
I’m not sure I trust the accuracy. It varied quite a bit measuring anywhere from 1 mm less to 3 mm less than with a lens store measured
Brilliant
Works as advertised, appreciate privacy first approach.
Free
In-App Purchases
About
Accurately measure your interpupillary distance (PD) using advanced iPhone sensors. Get precise results in seconds for ordering glasses, setting up VR, or tracking vision. Offers both free basic measurements and advanced pro features via in-app purchase.
✓TrueDepth sensor accuracy
✓Fast, no-guesswork measurements
✓Free basic PD measurement
✓Pro features via in-app purchase
✓History and profile saving
✓PDF report export
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What's New in Pupillary Distance Ruler
1.0
September 25, 2025
Subscription plans
Pro Yearly Subscription
Get all Pro features for 1 year
$5.991 Year
2
In-App Purchases
$9.99
Pro Forever
Advanced features for a one-time payment
User reviews
Developer apps
FAQ
What is Pupillary Distance Ruler?
Pupillary Distance Ruler is an iPhone application that uses the device's TrueDepth camera sensors to measure your interpupillary distance (PD). This measurement is crucial for ordering prescription glasses and optimizing VR headset fit.
How accurate is Pupillary Distance Ruler?
The app leverages advanced TrueDepth sensors for precise 3D measurements, offering greater accuracy than traditional ruler and mirror methods. Pro features enhance accuracy further with more samples and outlier rejection.
Is Pupillary Distance Ruler free to use?
Yes, the core functionality of measuring distance PD is available for free. Advanced features like monocular PD, history saving, and PDF export require a Pro upgrade through an in-app purchase.
What are the Pro features of Pupillary Distance Ruler?
Pro features include Advanced Accuracy Mode for more precise readings, Monocular PD to measure each eye separately, History & Profiles to save multiple measurements, and Export & Share functionality for PDF reports.
Is my data safe with Pupillary Distance Ruler?
Yes, the app prioritizes privacy with 100% on-device processing. Your face data never leaves your device, and no photos, meshes, or videos are stored. Only the numerical results you choose to save are kept locally.
What devices support Pupillary Distance Ruler?
Pupillary Distance Ruler is supported on iPhones and iPads that are equipped with TrueDepth camera sensors, which are necessary for the app's core measurement functionality.
How often is Pupillary Distance Ruler updated?
The app was last updated on September 25, 2025, with version 1.0. Future updates will likely focus on improving accuracy, adding new features, and ensuring compatibility with the latest iOS versions.
What is the age rating for Pupillary Distance Ruler?
Pupillary Distance Ruler has an age rating of 4+. This indicates it is suitable for users aged 4 and above, with no specific content concerns.
