# PD+ : Easy Pupillary Distance — user reviews > 23 indexed App Store user reviews of PD+ by Zernike LLC, rated 4.70/5 from 509 ratings. - Source: https://appshunter.io/ios/app/pd-plus-easy-pupillary-distance/id1560353383/reviews - App overview in markdown: https://appshunter.io/ios/app/pd-plus-easy-pupillary-distance/id1560353383.md - Rating breakdown: 5★ 434 · 4★ 37 · 3★ 14 · 2★ 2 · 1★ 22 ## What do users think of PD+? Overall sentiment: mixed **Pros** - 👍 Easy and quick measurement - 💡 Clever and innovative app - ⭐ Highly accurate measurements - 👍 Friendly and easy to use - 🗣️ Voice instructions included - ✅ Reliable PD and seg height measurements **Cons** - 📉 Unstable measurements - ❓ Measurement inconsistency - ❌ Inaccurate PD readings - 🤔 Measurements not trustworthy - 📏 PD off by several mm - 🤷‍♀️ Incorrect frame size recommendations - 😵‍💫 No two consecutive measures the same - 📱 Not working on iPad - 💥 App keeps crashing **Commonly reported bugs** - Face size unstable - Camera distance sensitive - App keeps crashing - PD feature doesn't work on iPad - Page stays black on iPad **Most requested features** - Can this app measure the PD for progressive lenses for right and left eyes? ## Newest reviews (3 of 23) ### 5/5 — Friendly use *2023-08-10* friendly use and accurate. ### 5/5 — Artist/ painter *2022-09-24, version 1.2* Like it very much . Very convenient and will follow up and discover more detail functions ### 5/5 — Only reliable seg height measurement app in the store *2022-08-30, version 1.1.1* Very accurate PD and seg height measurements ## Most critical reviews (10 lowest-rated) ### 1/5 — Wrong measurement! *2026-05-10, version 1.7.7* I remember at shop they measured 62 for my pd and the app is showing 56? lol pd don’t change over a year so user beware. Download more apps to get a consistent trend. ### 1/5 — Measurements way off *2026-04-17, version 1.7.7* My PD is 67 and this gave me 56 after measuring 3 times. It also recommended extra small frame when I always need extra large frames ### 1/5 — Which measurement to trust *2026-04-10, version 1.7.7* Measured 4 times, get 4 different results…it’s a NO GO for me, cannot trust it. ### 1/5 — pd is so far off *2026-02-13, version 1.7.6* not even close 20% off from several others, i have a giant wide face and it says small frames bahahah ### 1/5 — Do not order based on this app *2026-01-19, version 1.7.6* No 2 consecutive measures the same and does not come close to optician’s measure. ### 1/5 — Won’t open *2025-08-11, version 1.7.5* Keeps crashing ### 1/5 — Incorrect results *2023-08-05, version 1.6.0* Bad results. There’s no way my PD is 54 … don’t trust this app. ### 1/5 — Not working on my iPad *2022-10-10* The PD feature doesn’t work on my iPad. Page stays black, buttons do nothing. Useless. Deleted. **Developer response:** Thank you for your feedback John, and we apologize for the experience. We have since tested on a number of iPads and getting great results. If you would be so kind and give the app another try, we would be grateful. ### 3/5 — Unstable measure *2026-06-14, version 1.7.7* Face size went small, large, small again and seems to be very camera distance sensitive. This instability casts doubt on the overall measurement ability ### 3/5 — PD not quite there *2023-06-22, version 1.6.0* Using an iPhone SE. PD’s for myself and my coworkers were constantly off by 4-6 mm. Calculations are a great tool to have for the pocket access, but since most people will probably use this to measure their PD for online glasses prescriptions, I would not recommend this. Best to get it measured by a real optician. ## Most praised reviews (10 highest-rated) ### 5/5 — Great app *2026-07-18, version 1.7.7* Good great grand wonderful ### 5/5 — PD *2026-06-09, version 1.7.7* Easy and quick way for measuring. Really good ### 5/5 — Mr C *2026-05-26, version 1.7.7* Best PD app yet, very clever. ### 5/5 — Excellent App *2026-05-08, version 1.7.7* I love the actual preciseness of the app. ### 5/5 — Most Accurate by testing *2026-04-25, version 1.7.7* This app gave me the most accurate results by far, all the other apps rely on lidar depth sensors and some AI guesstimates to give you a generic result which is way off, but this one lets you face in a green zone to accurately determine the PD. I still say the credit card and photoshop method works the best if you want accuracy. ### 5/5 — Friendly use *2025-05-03, version 1.7.4* friendly use and accurate. ### 5/5 — Progressive lenses *2025-04-22, version 1.7.4* Can this app measure the PD for progressive lenses for right and left eyes? ### 5/5 — Five stars *2024-06-08, version 1.7.1* Five of five ### 5/5 — Works great *2023-12-08, version 1.6.3* There were a couple others that I tried but this one worked great. It even has voice instructions. I would highly recommend this app ### 5/5 — So far so good *2023-08-10* I like it. Have no complaints --- *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 2026-09-08.*