# PD Measure Ruler vs Nara Command Center

The clearest difference is rating: Nara Command Center at 5.0 against PD Measure Ruler's 4.0. Nara Command Center also leads on in-app purchases (none vs 4). PD Measure Ruler's advantage is update cadence (every 6 days vs every 5 weeks) and ratings volume (41 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PD Measure Ruler sells 4 in-app purchases, starting at $2.99 per 7 days. Nara Command Center asks for nothing beyond the download.

Nara Command Center holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: PD Measure Ruler has 41 ratings behind it against 1, so its average is the more settled of the two.

PD Measure Ruler ships an update every 6 days, Nara Command Center every 5 weeks. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PD Measure Ruler | Nara Command Center |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (41 ratings)](https://appshunter.io/ios/app/pd-measure-ruler/id6670557555/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nara-command-center/id6785341956/reviews)** |
| Number of ratings | **41** | 1 |
| Positive reviews | 27.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 24 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Arun Menon](https://appshunter.io/developer/6785341958) |

## What reviewers say

### PD Measure Ruler

[App page](https://appshunter.io/ios/app/pd-measure-ruler/id6670557555)

Accurately measure your pupillary distance (PD) for eyeglasses and VR headsets. Offers both manual and automatic measurement modes for precise results. Optimize your eyewear fit with this user-friendly tool.

**Highlights:** Manual PD measurement, Automatic PD measurement, Accurate and precise readings, User-friendly interface, Eyeglass fitting assistance, VR headset adjustment

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Weekly | $7.99 | per 7 days |
| Monthly | $14.99 | per month |


### Nara Command Center

[App page](https://appshunter.io/ios/app/nara-command-center/id6785341956)

Manage personal and family records, track health metrics like calories, and prepare for medical appointments. Seamlessly integrate data from Apple HealthKit and wearables to find appropriate care.

**Highlights:** Record management, Health metric tracking, Calorie tracking, Doctor visit preparation, Care coordination, Wearable integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PD Measure Ruler free?

PD Measure Ruler is free to download, with in-app purchases available.

### Is Nara Command Center free?

Nara Command Center is free to download, with no in-app purchases.

### Which has better reviews, PD Measure Ruler or Nara Command Center?

Nara Command Center is rated higher. PD Measure Ruler averages 4.0 out of 5 from 41 ratings, while Nara Command Center averages 5.0 from 1 ratings.

### Do PD Measure Ruler or Nara Command Center have ads?

Neither PD Measure Ruler nor Nara Command Center shows ads.

### Which is updated more often, PD Measure Ruler or Nara Command Center?

PD Measure Ruler ships an update every 6 days, and Nara Command Center every 5 weeks. Most recently, PD Measure Ruler was updated on October 24, 2026 and Nara Command Center on October 14, 2026.

---

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