Comparison

PDCheck AR vs Assay

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

Head to head
About

PDCheck AR

Instantly measure your pupillary distance using your phone's camera and augmented reality. This app provides accurate measurements for both distance and near viewing, essential for ordering glasses or adjusting VR headsets. Compatible with Face ID-enabled iPhones.

Highlights
  • Measures far pupillary distance
  • Measures near pupillary distance
  • No external tools required
  • Compatible with Face ID iPhones
  • Share results via email
  • Useful for ordering eyewear
  • Adjust VR headset fit
Features
Read full description

Use Augmented Reality (AR) technology to instantly measure your pupillary distance, one of the numbers needed for ordering glasses. All you need to measure your pupillary distance is your phone! Disclaimer: Your phone must be iPhone X or newer and must support Face ID. Features Measures your far pupillary distance, including your left and right pupillary distance, for distance viewing Measures your near pupillary distance for near viewing No tape measure, credit card, or other objects required Works with all iPhones that have Face ID capabilities Perfect for ordering EyeQue’s Try-On Glasses before spending on designer glasses. Use for ordering eyewear or adjusting your virtual reality (VR) headset This app works with: iPhone X, XS, XR, XS Max, and later models that use Face ID technology

About

Assay

Features
Read full description

Your apps track. Your training should respond. Your workout log knows what you lifted. Your wearable knows how you slept. Your food log knows what you ate. But connecting those numbers to what you should do next still falls on you. Assay closes that gap. It brings your training, recovery and nutrition together, builds your strength plan around your goals, and adjusts planned sessions as your recovery, performance and circumstances change. YOUR BODY REPORTS IN Connect Apple Health and Assay compares your sleep, heart rate variability (HRV) and resting heart rate with your own baseline. The same number can mean different things for different people. Your recent history gives it context. YOUR TRAINING ANSWERS A rough night? Assay can reduce today’s planned work and show the reason. Last session felt easy? Your logged reps, weight and effort help guide the next prescription. Less time today? Shorten the session to fit. Your recovery becomes something your training can respond to. YOUR GYM. YOUR EQUIPMENT. YOUR TIME. A plan should work in the room you’re actually training in. Build sessions around the equipment at your gym, at home or when travelling. Change locations, swap an exercise or adjust your available time—and keep training. FOLLOW YOUR BODY’S RESPONSE Track your weight, body composition and training by muscle group. Connect a compatible Withings scale for additional measurements. Supported left/right muscle measurements can guide extra work for the weaker side. FUEL YOUR TRAINING Give your eating a purpose with calorie and protein targets built around your goal. Log meals manually or save your usual meals for quick entry. With Premium, log from a photo or describe what you ate. YOUR WEEKLY REVIEW With Premium, review your training and nutrition, revisit previous targets and set priorities for the week ahead. Ask Coach about your plan and history. Coach chat can propose changes to your plan for you to confirm. BUILT FOR THE GYM FLOOR • Exercise video demonstrations, warm-ups, suggested weights and rest timers • Log reps, weight and effort to guide progression • Live Activities and Dynamic Island support for following your session • My Routines for building and saving your own workouts • Offline workout logging that syncs when you reconnect • Session shortening when your schedule changes • Yoga, mobility and cardio options alongside strength training ON YOUR WRIST Log sets, reps, weight and effort from Apple Watch. Follow haptic rest timers, see your live heart rate and save your workout to Apple Health. WHO IT’S FOR People who lift and want their training to respond to real life. Your goals matter. So do your recovery, your equipment and the time you actually have. START FREE Free access includes workout logging, a training plan, a readiness score and manual meal logging. Premium adds detailed readiness insights, full workout history, unlimited session shortening, photo and text meal logging, weekly reviews and Coach chat. Your 14-day Premium trial starts when you complete your first workout. No payment details are required to start the trial. An Apple Watch or smart scale is optional. Connected features depend on the data you choose to share. Workout loads currently use kilograms. Premium is available through monthly and annual subscriptions. Prices are shown in the app. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Manage or cancel subscriptions in your Apple Account settings. Assay — Body Intelligence. Your body reports in. Your training answers. Terms of Use: https://assay.fit/terms Privacy Policy: https://assay.fit/privacy

Screenshots

PDCheck AR4 screens
Assay4 screens

Verdict

The call

The clearest difference is in-app purchases: PDCheck AR at none against Assay's 2. PDCheck AR also leads on iOS requirement (13.0 vs 17.0). Assay's advantage is update cadence (daily vs every 3 months). On price, ads 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. Assay sells 2 in-app purchases, starting at $16.99 per month. PDCheck AR asks for nothing beyond the download.

UpkeepUpdate frequency

PDCheck AR ships an update every 3 months, Assay daily. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
PDCheck AR versus Assay: the parameters behind the verdict, then further details
ParameterPDCheck ARAssay
PriceFreeFree
Rating4.9 (3.8K ratings) — better—
Positive reviews70.6% of reviews—
Number of ratings3.8K — better—
Update frequencyEvery 3 monthsDaily — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS13.0 — better17.0
Further details — not scored
Size18 MB22 MB
Age rating4+4+
DeveloperEyeQue CorporationCoded Matter FZ LLE

Bugs and requests

PDCheck AR

Reported bugs

2 issues
  • Measure button not working
  • Measurements changing every time

Requested features

2 requests
  • Dark mode option
  • Ability to save and share measurements

Assay

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

PDCheck AR

No in-app purchases

2 purchases

Assay

Subscriptions2
  • Premium Monthly$16.991 Month
  • Premium Annual$89.991 Year

Questions

Is PDCheck AR free?
PDCheck AR is free to download, with no in-app purchases.
Is Assay free?
Assay is free to download, with in-app purchases available.
Do PDCheck AR or Assay have ads?
Neither PDCheck AR nor Assay shows ads.
Which is updated more often, PDCheck AR or Assay?
PDCheck AR ships an update every 3 months, and Assay daily. Most recently, PDCheck AR was updated on October 17, 2026 and Assay on October 1, 2026.

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