Comparison

PDCheck AR vs ArcX

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

ArcX

Control your smart ring, receive personalized music recommendations, and manage your profile. Features include SOS for emergencies and integration with smartwatches for heart rate-based music.

Highlights
  • Personalized music recommendations
  • Smart ring configuration
  • SOS emergency feature
  • Heart rate-based music adaptation
  • Profile management
  • Dashboard control hub
Features
Read full description

ArcX is the only fitness app that matches music to your live heart rate and mood in real time. Not recommendations. Not a curated playlist. A patented performance system that evolves with every rep, every stride, every beat. MUSICBOOST - PERFORMANCE MUSIC, POWERED BY SCIENCE Your mood sets the tone. Your heart rate writes the rest. Before your workout, tell MusicBoost how you're feeling, what you're doing and how hard you're going. Connect Spotify, link your wearable and press Play. From there, MusicBoost reads your live heart rate and adapts your music in real time - turning it up as you push harder and dialling it back as you ease off. No manual adjustments. No skipping tracks. Just the right song, at the right moment, every time. Research shows tempo-matched music delivers: +15% performance output -12% perceived fatigue +20% training endurance Spotify connected. Apple Music coming soon. Protected by US Patent No. 12,681,987. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PDCheck AR4 screens
ArcX4 screens

Verdict

The call

The clearest difference is review sentiment: PDCheck AR at 70% against ArcX's 0%. PDCheck AR also leads on rating (4.9 vs 1.7) and in-app purchases (none vs 2). ArcX's advantage is update cadence (every 3 weeks 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. ArcX sells 2 in-app purchases, starting at $4.99 per month. PDCheck AR asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PDCheck AR holds the better App Store score, 4.9 against 1.7. That said, the two scores are not equally well evidenced: PDCheck AR has 4.1K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 70% of PDCheck AR's written reviews are positive against 0% of ArcX's.

UpkeepUpdate frequency

PDCheck AR ships an update every 3 months, ArcX every 3 weeks. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

Scorecard7 real differences · 3 level
PDCheck AR versus ArcX: the parameters behind the verdict, then further details
ParameterPDCheck ARArcX
PriceFreeFree
Rating4.9 (4.1K ratings) — better1.7 (7 ratings)
Positive reviews70.5% of reviews — better0.0% of reviews
Number of ratings4.1K — better7
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size18 MB80 MB
Age rating4+4+
DeveloperEyeQue CorporationArcX Technology Ltd

Customer experience

PDCheck AR

All ratings3,016 ratings
Positive97.7%
Neutral1.2%
Negative1.1%
Written reviews88 reviews
Positive70.5%
Neutral5.7%
Negative23.9%

ArcX

All ratings7 ratings
Positive0.0%
Neutral28.6%
Negative71.4%
Written reviews6 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

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

ArcX

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

PDCheck AR

No in-app purchases

2 purchases

ArcX

Subscriptions2
  • Arcx Premium14 Days trial$4.991 Month
  • Arcx Premium14 Days trial$49.991 Year

Questions

Is PDCheck AR free?
PDCheck AR is free to download, with no in-app purchases.
Is ArcX free?
ArcX is free to download, with in-app purchases available.
Which has better reviews, PDCheck AR or ArcX?
PDCheck AR is rated higher. PDCheck AR averages 4.9 out of 5 from 4.1K ratings, while ArcX averages 1.7 from 7 ratings.
Do PDCheck AR or ArcX have ads?
Neither PDCheck AR nor ArcX shows ads.
Which is updated more often, PDCheck AR or ArcX?
PDCheck AR ships an update every 3 months, and ArcX every 3 weeks. Most recently, PDCheck AR was updated on October 30, 2026 and ArcX on October 27, 2026.

Other comparisons