# PDCheck AR vs Assay

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.

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.

PDCheck AR ships an update every 3 months, Assay daily. The most recent releases landed on October 20, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PDCheck AR | Assay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (3.8K ratings)](https://appshunter.io/ios/app/pdcheck-ar/id1563806777/reviews)** | — |
| Number of ratings | **3.8K** | — |
| Positive reviews | 70.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Monetization | Free | — |
| Size | 18 MB | 22 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [EyeQue Corporation](https://appshunter.io/developer/1127114607) | [Coded Matter FZ LLE](https://appshunter.io/developer/6787039059) |

## What reviewers say

### PDCheck AR

[App page](https://appshunter.io/ios/app/pdcheck-ar/id1563806777)

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:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Quick and easy to use
- 👍 Straight-forward, no fuss
- 👍 Accurate and consistent measurements
- 👍 Detailed measurements (far PD, near PD, individual eye PDs)
- 👍 Convenient for online orders

**What reviewers complain about**

- 🐛 Inconsistent or inaccurate measurements
- 🐛 Doesn't work on some devices

**Reported bugs**

- Measure button not working
- Measurements changing every time

**Requested features**

- Dark mode option
- Ability to save and share measurements


### Assay

[App page](https://appshunter.io/ios/app/assay-adaptive-training/id6804771050)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $16.99 | per month |
| Premium Annual | $89.99 | per year |


## Frequently asked 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 20, 2026 and Assay on October 1, 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.*