# Pupil Distance PD Express — user reviews > 13 indexed App Store user reviews of Pupil Distance PD Express by Tech Positive, rated 4.50/5 from 98 ratings. - Source: https://appshunter.io/ios/app/pupil-distance-pd-express/id1438873499/reviews - App overview in markdown: https://appshunter.io/ios/app/pupil-distance-pd-express/id1438873499.md - Rating breakdown: 5★ 78 · 4★ 9 · 3★ 0 · 2★ 2 · 1★ 9 ## Most critical reviews (10 lowest-rated) ### 1/5 — Not accurate *2022-04-14* Not accurate ### 1/5 — Not supported when stated it was *2022-02-24* I paid $10 to purchase this app after looking at the specs to make sure it was supported on my device only to be immediately given a screen stating it was not supported. Under compatibility it clearly states it is compatible but I’m guessing I’ll get a robot response to this review stating that it does not state that as in an earlier review I noticed. ### 1/5 — Bull excreta *2020-04-23* Description says works with 6s. It does not. **Developer response:** As our app description says, app works with iPhone X or later. ### 1/5 — Said it was compatible with my phone and iPad, but was not *2020-04-10* Compatibility section mentioned my iPhone 8 Plus and iPad 6th gen models. Once I paid and installed it, I found out it is not compatible. I paid for the app because the free ones said that I needed an iPhone X. Not happy at all. **Developer response:** As our app description says, app works with iPhone X or later. ### 1/5 — Warning needed *2019-08-11* The description says that you need an iPhone X (which I have) but does not explain that Face ID is used (mine doesn’t work). Wasted $3. **Developer response:** Sorry to hear that the app is not up to your expectation. What error are you getting when trying to use the app? Please email us at support@techpositive.co and we will make it right. ### 1/5 — ONLY WORKS WITH iPhone X!!! Don’t waste your $ *2019-01-27* Only AFTER I bought this does it warn that it won’t work on my iPhone 8. Poor execution. **Developer response:** Hello, We are sorry to hear that your phone is incompatible with the app. App description clearly states the phone models, this app will work with. Please contact Apple for a refund of your payment in this case. ### 2/5 — No instructions at all *2023-06-18* There are no instructions at all. Yes it is easy to just open the app and use it but each time im getting different readings. Is there a distance I should be doing the measurement from. When I try to get help from the app support it just takes me to a generic web page. ### 2/5 — Constant Ratings Nag - wild measurement results swing *2019-09-02* Constantly NAGS to give App Store rating ... not sure about accuracy, keeps giving readings that are between 3mm apart. Other free “Eye Measure App” got closer to in-store doctor measurements. Measured with glasses on and with glasses off. Using iPhone X. **Developer response:** We take pride in total customer satisfaction. Please email us at support@techpositive.co and let us know the problem you are facing with the app and we will be happy to help you resolve it. ### 4/5 — Great to have *2024-08-13* As the online optical industry grows, its great to have an accurate way to measure PD. No more guesswork. Thank you. ### 4/5 — Simple and pretty accurate *2019-01-07* Simplifies getting your PD. It was off by 1/2 mm from my optician’s reading at first but after multiple passes it matched about 1/2 the time. **Developer response:** Thank you for your kind words. We are always working to make the app better. ## Most praised reviews (3 highest-rated) ### 5/5 — My Screen is Black *2024-06-14* Help! I have been using your app for a few years and it recently started displaying a black screen. I have uninstalled and reinstalled it several times, this seemed to have temporarily fixed the issue. It has since reverted to permanently showing a black screen when I open the app. I tried to contact you through your tech support feature, to no avail. Thanks! ### 5/5 — Easy! *2019-08-02* Very easy to use! Other apps seemed complicated; glad I chose this one. It does all the work for you. **Developer response:** Thank you for your kind words. We are always working to make the app better. ### 5/5 — Easy to use *2018-12-31* Excellent app! It was easy to use and it matched the same measurements I just received at the optometrist. **Developer response:** Thank you for your kind words. We are always working to make the app better. --- *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 2026-08-24.*