Comparison

Pupillary Distance Measure X vs Interval Timer

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

Head to head
About

Pupillary Distance Measure X

This utility app automatically measures your pupillary distance using your iPhone's camera. Simply take a selfie and get an accurate reading to help with ordering glasses or adjusting VR headsets.

Highlights
  • Automatic PD measurement
  • Quick and accurate readings
  • Uses iPhone camera
  • Supports eyeglasses ordering
  • Helps adjust VR headsets
Read full description

Automatic, quick and accurate pupillary distance measurement on iPhone X+ devices. How to measure your PD: Look straight at the camera as taking a selfie, tap the button and see your PD. You can use your ipd results for ordering eyeglasses online or for adjusting your VR headset. If your device is not supported by this app please check out our Pupillary Distance Measure app for older devices: https://apps.apple.com/us/app/pupillary-distance-measure/id1424323835 Contact support@vistechprojects.com if you have any questions or need assistance.

About

Interval Timer

Create custom timer sequences for various activities like breathwork, workouts, focus sessions, and cooking. Features AI voice prompts and iCloud sync across Apple devices. Offers a clean, black-and-white interface.

Highlights
  • Customizable timer chains
  • Breathwork flow builder
  • Workout routine creator
  • Focus timer sequences
  • AI voice prompts
  • iCloud sync
  • Black and white UI
Features
Read full description

"Liquid Glass really comes to life on its widgets" - Michael Burkhardt, 9to5Mac. "What I like most about TimeWave, though, is its clean, black-and-white design" - John Voorhees, MacStories. "Best iPhone Apps of July, 2021" - Beau Hamilton, Slashdot. WHAT CAN YOU DO WITH TIMEWAVE? TimeWave allows you to combine your breathwork app, your workout app, your focus timer, cooking timer and much more into one single app. You can use TimeWave for: • Breathwork — build custom breathing flows like 4-7-8 Breathing to lower blood pressure, Physiological Sigh to reduce stress and anxiety, Wim Hof Breathing to increase alertness, Box Breathing to relax and much more. • Intermittent Fasting — Create your own intermittent fasting using various splits like 16:8, 12:12, 5:2, etc. You can create timer-splits for each day or for the entire week. • Workout Routines — create your own workouts by chaining excercise and break durations. You can make Tabata/HIIT workouts or even yoga routines. • 20-20-20 Rule — create a timewave to follow the 20-20-20 rule (Every 20 minutes look at something 20 ft away for 20 seconds) while working with screens to prevent eye-strain. • Focus Timers — create pomodoro timers or any kind of work-break timewaves. You are not restricted to 25 minute session, you can create any sequence that suits your preferences. • Cooking — ever had to keep resetting your timers after each whistle? well, now you wont have to. Just create a timewave for each recipe. • Everything — anything else that involves timed sequential tasks. SPECIAL FEATURES: • TimeWave A.I — TimeWave will tell you what has to be done for how long while the Calibre is running. For eg: "Breathe In For 4 Seconds" so you don't have to look at the screen. • iCloud Sync — Available on Mac, iPad, iPhone and Apple Watch and keeps everything up-to to date on all your devices with iCloud Sync. • Black & White UI — B&W is a lot of colours. If you are anything like us, you'll love our ironically modern black and white UI. MORE: • Personal touch — a hand-crafted Indie app. If you have any questions or feedback, you can reach out to us at timewave.team@gmail.com Privacy Policy: https://timewaveapp.com/privacy Terms of Use: https://timewaveapp.com/terms

Screenshots

Pupillary Distance Measure X4 screens
Interval Timer4 screens

Verdict

The call

The clearest difference is price: Interval Timer at Free against Pupillary Distance Measure X's $1.99. Interval Timer also leads on update cadence (fortnightly vs every 7 months) and review sentiment (86% vs 68%). Pupillary Distance Measure X's advantage is in-app purchases (none vs 3) and ratings volume (178 vs 25). On rating and ads 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

Interval Timer is free to download; Pupillary Distance Measure X costs $1.99 up front. Interval Timer sells 3 in-app purchases, starting at $1.99 per month. Pupillary Distance Measure X asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Pupillary Distance Measure X against 4.6 for Interval Timer. That said, the two scores are not equally well evidenced: Pupillary Distance Measure X has 178 ratings behind it against 25, so its average is the more settled of the two. Written reviews are what separate them: 68% of Pupillary Distance Measure X's written reviews are positive against 86% of Interval Timer's.

UpkeepUpdate frequency

Pupillary Distance Measure X ships an update every 7 months, Interval Timer fortnightly. Both last shipped on November 7, 2026.

Scorecard8 real differences · 2 level
Pupillary Distance Measure X versus Interval Timer: the parameters behind the verdict, then further details
ParameterPupillary Distance Measure XInterval Timer
Price$1.99Free — better
Rating4.5 (178 ratings)4.6 (25 ratings) — better
Positive reviews67.5% of reviews85.7% of reviews — better
Number of ratings178 — better25
Update frequencyEvery 7 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS12.0 — better26.0
Further details — not scored
Size17 MB49 MB
Age rating4+4+
DeveloperVisTech.Projects LLCMuhammed Sahil Arayakandy

Customer experience

Pupillary Distance Measure X

All ratings179 ratings
Positive87.2%
Neutral5.6%
Negative7.3%
Written reviews77 reviews
Positive67.5%
Neutral5.2%
Negative27.3%

Interval Timer

All ratings25 ratings
Positive92.0%
Neutral0.0%
Negative8.0%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

Bugs and requests

Pupillary Distance Measure X

Reported bugs

8 issues
  • Does not work on iPhone 8 running iOS 16
  • Does not work on Apple 12 Pro w/ iOS 15.7
  • Does not work on 2nd gen iPhone SE
  • Camera button not clickable
  • Keeps prompting to move face farther away
Show 3 more
  • Results vary, impossible to tell which is correct
  • Received NaN for distance
  • App wants review before use

Requested features

4 requests
  • Include left and right eye measurement with nasal bone consideration
  • Allow saving of results
  • Improve compatibility with older devices
  • Provide clearer instructions within the app

Interval Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Pupillary Distance Measure X

No in-app purchases

3 purchases

Interval Timer

Subscriptions2
  • Monthly Premium$1.991 Month
  • Yearly Premium7 Days trial$9.991 Year
One-time1
  • Lifetime Premium$24.99

Questions

Is Pupillary Distance Measure X free?
Pupillary Distance Measure X costs $1.99, with no in-app purchases.
Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Which has better reviews, Pupillary Distance Measure X or Interval Timer?
Interval Timer is rated higher. Pupillary Distance Measure X averages 4.5 out of 5 from 178 ratings, while Interval Timer averages 4.6 from 25 ratings.
Do Pupillary Distance Measure X or Interval Timer have ads?
Neither Pupillary Distance Measure X nor Interval Timer shows ads.
Which is updated more often, Pupillary Distance Measure X or Interval Timer?
Pupillary Distance Measure X ships an update every 7 months, and Interval Timer fortnightly. Most recently, Pupillary Distance Measure X was updated on November 7, 2026 and Interval Timer on November 7, 2026.

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