# Interpupillary Distance Meter vs HEMS (2.0)

The clearest difference is price: HEMS (2.0) at Free against Interpupillary Distance Meter's $0.99. HEMS (2.0) also leads on update cadence (every 3 months vs every 43 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

HEMS (2.0) is free to download; Interpupillary Distance Meter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Interpupillary Distance Meter ships an update every 43 months, HEMS (2.0) every 3 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Interpupillary Distance Meter | HEMS (2.0) |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.6 (514 ratings)](https://appshunter.io/ios/app/interpupillary-distance-meter/id1481753106/reviews)** | — |
| Number of ratings | **514** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 1 MB | 81 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Ubicolor Ltd](https://appshunter.io/developer/828691698) | [Advant](https://appshunter.io/developer/1558663663) |

## What reviewers say

### Interpupillary Distance Meter

[App page](https://appshunter.io/ios/app/interpupillary-distance-meter/id1481753106)

Quickly measure your inter pupillary distance using your iPhone or iPad. Achieve highly accurate results to 0.1mm for both near and far pupil distances. The app features large text for readability and supports dark mode.

**Highlights:** Accurate IPD measurement to 0.1mm, Near and far pupil distance, Glasses-free measurement for accuracy, Large, readable text, Dark mode support

**Features:** iPhone Duo support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Accurate measurements for some users
- 💡 Pure IPD measurement
- 👍 Works quickly
- 👍 Remarkable use of iPhone tech

**What reviewers complain about**

- 🐛 Inaccurate measurements reported
- 🐛 Compatibility issues with iPads
- 🐛 Does not work on older iPhones
- 🐛 Inability to read results without glasses
- 🐛 App crashes or fails to recognize eyes

**Reported bugs**

- Inaccurate IPD readings (up to 10% off)
- Does not work on iPad
- Incompatible with devices without true depth camera
- Cannot read results with glasses off
- App fails to recognize eyes

**Requested features**

- Allow measurement of near PD
- Improve compatibility information on App Store
- Fix compatibility for iPads and older iPhones
- Allow reading results with glasses on


### HEMS (2.0)

[App page](https://appshunter.io/ios/app/hems-20/id6751934572)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Interpupillary Distance Meter free?

Interpupillary Distance Meter costs $0.99, with no in-app purchases.

### Is HEMS (2.0) free?

HEMS (2.0) is free to download, with no in-app purchases.

### Do Interpupillary Distance Meter or HEMS (2.0) have ads?

Neither Interpupillary Distance Meter nor HEMS (2.0) shows ads.

### Which is updated more often, Interpupillary Distance Meter or HEMS (2.0)?

Interpupillary Distance Meter ships an update every 43 months, and HEMS (2.0) every 3 months. Most recently, Interpupillary Distance Meter was updated on November 3, 2026 and HEMS (2.0) on October 25, 2026.

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