# PDgo vs Haptic Interval Timer

The clearest difference is price: PDgo at Free against Haptic Interval Timer's $0.99. Haptic Interval Timer's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

PDgo is free to download; Haptic Interval Timer costs $0.99 up front. PDgo sells 2 in-app purchases, starting at $15.99 per year. Haptic Interval Timer asks for nothing beyond the download.

## The numbers

| Metric | PDgo | Haptic Interval Timer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdgo-pupillary-distance/id6778687480/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Xiamen Guangxu Zaodong Network Technology Co., Ltd.](https://appshunter.io/developer/6778687482) | [FatCouple OÜ](https://appshunter.io/developer/1883272580) |

## What reviewers say

### PDgo

[App page](https://appshunter.io/ios/app/pdgo-pupillary-distance/id6778687480)

Measure your pupillary distance (PD) accurately and quickly using your iPhone's camera. Get total and monocular PD, plus conversion for reading distances. All processing is done on your device for privacy.

**Highlights:** Pupillary distance measurement, Total and monocular PD, Near PD conversion, Measurement confidence rating, Local measurement history, Lens guidance suggestions

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Unlimited | $15.99 | per year |
| Single Result Unlock | $3.99 | one-time |


### Haptic Interval Timer

[App page](https://appshunter.io/ios/app/haptic-interval-timer/id6804729626)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PDgo free?

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

### Is Haptic Interval Timer free?

Haptic Interval Timer costs $0.99, with no in-app purchases.

### Do PDgo or Haptic Interval Timer have ads?

Neither PDgo nor Haptic Interval Timer shows ads.

---

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