Comparison

PD Measure Ruler vs Max Read

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PD Measure Ruler

Accurately measure your pupillary distance (PD) for eyeglasses and VR headsets. Offers both manual and automatic measurement modes for precise results. Optimize your eyewear fit with this user-friendly tool.

Highlights
  • Manual PD measurement
  • Automatic PD measurement
  • Accurate and precise readings
  • User-friendly interface
  • Eyeglass fitting assistance
  • VR headset adjustment
Features
Read full description

Unlock the perfect fit for your eyeglasses with our PD Ruler App – your fast and accurate tool for measuring pupillary distance (PD) using your iPhone! Accuracy and verifiability of the result are the main priority of this application for precise inter pupillary distance measurement, making it the best app for ordering glasses online, or just keeping track of your eye measurements. *** Manual Measurement *** (Requires subscription) Our app includes a highly accurate manual measurement mode, that works for most devices. Follow the intuitive on-screen guides to ensure precise results every time, no matter what device you're using. *** Quick & Automatic *** (Requires subscription) PD Measurement Effortlessly measure your pupillary distance with just one tap on supported devices (iPhone X +). Using your iPhone camera's advanced features, our app automatically detects and calculates your PD in a matter of seconds – giving you precise results for all your eyewear needs. Perfect for Glasses & VR Headsets Whether you’re buying new eyeglasses, adjusting a VR headset, or simply checking your PD for other purposes, our app makes the process hassle-free and accurate. Key Features: - Manual Measurement Mode: Perfect for most devices, ensuring no one is left behind (with a subscription). - Automatic PD Measurement: Fast, precise results using your camera's advanced features (with a subscription). - Accuracy & Precision: Our algorithm is fine-tuned for optimal performance to give accurate readings. - User-Friendly Interface: Simple and clear instructions guide you through the measurement process effortlessly. Take the guesswork out of your eyeglass fitting process with our app. Enjoy seamless accuracy. Optimize Your Vision. Optimize Your Fit. Manual and Automatic measure features require a subscription to use. By subscribing to the app you will be able to enjoy the full functionality of the app and measure pd distance using the manual method, which works on all devices, and optionally the automatic method if your device is supported. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. You can cancel your subscription at any time from your App Store account. Enjoy the app! Please contact support@vistechprojects.com for questions or inquiries. Terms of Use: https://www.vistechprojects.com/term-of-use Privacy Policy: https://www.vistechprojects.com/privacy-policy

About

Max Read

Features
Read full description

Max Read shows you one word at a time, right where your eyes are already looking. No lines to follow, no jumping back — just words arriving at the pace you choose. WHY IT WORKS When you read normally, your eyes spend most of their time moving between words instead of taking them in. Max Read removes those jumps: every word appears in the same spot, aligned to a highlighted anchor letter. Your eyes rest, your focus sharpens, and your pace climbs. READ ANYTHING • Import EPUB and PDF files • Open web articles from a link • Paste any text from your clipboard • Scan printed pages with your camera — OCR turns photos into readable text YOUR PACE, YOUR RULES • Set your speed from 100 to 1,000 words per minute • Add a natural pause at the end of each sentence • Feel the rhythm with subtle haptic feedback MAKE IT YOURS • Four backgrounds, including a calm animated gradient • Serif, sans-serif and typewriter fonts in three sizes • Eight anchor colors and adjustable guide lines PICK UP WHERE YOU LEFT OFF • Your Library keeps every document with reading progress and time left • The Content Explorer shows the full text so you can jump anywhere Max Read speaks your language: English, Danish, German, Spanish, Arabic, Turkish, Swedish, Chinese, Japanese, Greek, French, Dutch, Italian and Russian. Questions or ideas? Write to info@sebaexhibits.com — feedback goes straight to the developer. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PD Measure Ruler4 screens
Max Read4 screens

Verdict

The call

The clearest difference is update cadence: PD Measure Ruler at every 6 days against Max Read's fortnightly. PD Measure Ruler also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PD Measure Ruler sells 4 in-app purchases, starting at $2.99 per 7 days and Max Read sells 2 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PD Measure Ruler ships an update every 6 days, Max Read fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
PD Measure Ruler versus Max Read: the parameters behind the verdict, then further details
ParameterPD Measure RulerMax Read
PriceFreeFree
Rating4.0 (41 ratings) — better—
Positive reviews27.3% of reviews—
Number of ratings41 — better—
Update frequencyEvery 6 days — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size24 MB2 MB
Age rating4+4+
DeveloperVisTech.Projects LLCSensonet

In-app purchases

4 purchases

PD Measure Ruler

Subscriptions4
  • Weekly$2.997 Days
  • Weekly$4.997 Days
  • Weekly$7.997 Days
Show 1 more
  • Monthly$14.991 Month
2 purchases

Max Read

Subscriptions1
  • Unlimited Yearly3 Days trial$1.991 Year
One-time1
  • Max Read Lifetime$5.99

Questions

Is PD Measure Ruler free?
PD Measure Ruler is free to download, with in-app purchases available.
Is Max Read free?
Max Read is free to download, with in-app purchases available.
Do PD Measure Ruler or Max Read have ads?
Neither PD Measure Ruler nor Max Read shows ads.
Which is updated more often, PD Measure Ruler or Max Read?
PD Measure Ruler ships an update every 6 days, and Max Read fortnightly. Most recently, PD Measure Ruler was updated on October 24, 2026 and Max Read on October 25, 2026.

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