# Pupillary Distance Measure X vs Interval Timer

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.

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.

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.

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

## The numbers

| Metric | Pupillary Distance Measure X | Interval Timer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.5 (178 ratings)](https://appshunter.io/ios/app/pupillary-distance-measure-x/id1501962819/reviews) | **[4.6 (25 ratings)](https://appshunter.io/ios/app/interval-timer-timewave/id1524345488/reviews)** |
| Number of ratings | **178** | 25 |
| Positive reviews | 67.5% of reviews | **85.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 17 MB | 49 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Muhammed Sahil Arayakandy](https://appshunter.io/developer/1524345491) |

## What reviewers say

### Pupillary Distance Measure X

[App page](https://appshunter.io/ios/app/pupillary-distance-measure-x/id1501962819)

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Quick results
- 🎯 Accurate measurements
- 💡 Useful for ordering glasses
- ✅ Works as intended

**What reviewers complain about**

- ❌ Inconsistent results
- ❌ Does not work on all devices
- ❌ Requires specific phone models
- ❌ App prompts for review too early
- ❌ Technical issues/bugs

**Reported bugs**

- 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

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/interval-timer-timewave/id1524345488)

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:** Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.99 | per month |
| Yearly Premium | $9.99 | per year |
| Lifetime Premium | $24.99 | one-time |


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*