# PD Meter vs Backfold Go

The clearest difference is in-app purchases: PD Meter at none against Backfold Go's 1. Backfold Go's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Backfold Go sells 1 one-off in-app purchase. PD Meter asks for nothing beyond the download.

## The numbers

| Metric | PD Meter | Backfold Go |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/pd-meter-pupillary-distance/id6784830581/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | — |
| Monetization | Ad-supported | — |
| Size | 95 MB | 1 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [heekyung moon](https://appshunter.io/developer/6779193748) | [UAU Srl](https://appshunter.io/developer/6818139404) |

## What reviewers say

### PD Meter

[App page](https://appshunter.io/ios/app/pd-meter-pupillary-distance/id6784830581)

Easily measure your pupillary distance at home using your phone's camera and a standard card. Get a quick, repeatable estimate in millimeters for ordering glasses online without needing a ruler or another person.

**Highlights:** Measure PD using front-camera selfie, Use standard card for scale, Get PD in millimeters, Single (binocular) PD measurement, Guided flow with on-screen tips, Re-measure and average results

**Features:** Vision Pro support

**In-app purchases:** none


### Backfold Go

[App page](https://appshunter.io/ios/app/backfold-go/id6818210828)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Backfold Go Full | $8.99 | one-time |


## Frequently asked questions

### Is PD Meter free?

PD Meter is free to download, with no in-app purchases.

### Is Backfold Go free?

Backfold Go is free to download, with in-app purchases available.

### Do PD Meter or Backfold Go have ads?

PD Meter shows ads; Backfold Go does not.

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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.*