# PD Measure Ruler vs Swift Flatbed

The clearest difference is in-app purchases: Swift Flatbed at none against PD Measure Ruler's 4. On price, update cadence, ads and device support 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. Swift Flatbed asks for nothing beyond the download.

PD Measure Ruler ships an update every 6 days, Swift Flatbed every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PD Measure Ruler | Swift Flatbed |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (41 ratings)](https://appshunter.io/ios/app/pd-measure-ruler/id6670557555/reviews)** | — |
| Number of ratings | **41** | — |
| Positive reviews | 27.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Armando Salinas](https://appshunter.io/developer/1755443670) |

## 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 |


### Swift Flatbed

[App page](https://appshunter.io/ios/app/swift-flatbed/id6755739677)

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

**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 Swift Flatbed free?

Swift Flatbed is free to download, with no in-app purchases.

### Do PD Measure Ruler or Swift Flatbed have ads?

Neither PD Measure Ruler nor Swift Flatbed shows ads.

### Which is updated more often, PD Measure Ruler or Swift Flatbed?

PD Measure Ruler ships an update every 6 days, and Swift Flatbed every 3 days. Most recently, PD Measure Ruler was updated on October 24, 2026 and Swift Flatbed on October 25, 2026.

---

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