# Bark vs PD Meter

The clearest difference is review sentiment: Bark at 98% against PD Meter's 25%. Bark also leads on rating (4.9 vs 2.0) and ratings volume (109 vs 4). PD Meter's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Bark sells 2 in-app purchases, starting at $2.69 per year. PD Meter asks for nothing beyond the download.

Bark holds the better App Store score, 4.9 against 2.0. That said, the two scores are not equally well evidenced: Bark has 109 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 98% of Bark's written reviews are positive against 25% of PD Meter's.

Bark ships an update every 3 weeks, PD Meter monthly. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Bark | PD Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (109 ratings)](https://appshunter.io/ios/app/bark-custom-notifications/id1403753865/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/pd-meter/id1497268134/reviews) |
| Number of ratings | **109** | 4 |
| Positive reviews | **98.4% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 32 MB | 93 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [丰 黄](https://appshunter.io/developer/1090589311) | [杭州美戴科技有限公司](https://appshunter.io/developer/1123653009) |

## What reviewers say

### Bark

[App page](https://appshunter.io/ios/app/bark-custom-notifications/id1403753865)

Send custom push notifications to your iPhone via an HTTP API. Supports advanced features like custom icons, grouping, and critical alerts. Offers privacy-protected, end-to-end encrypted pushes with self-deployable server options.

**Highlights:** HTTP API for push notifications, Custom icons and grouping, Continuous and critical alerts, End-to-end push encryption, Self-deployable server options, Privacy-protected notifications

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Continuous support | $2.69 | per year |
| One-time donation | $2.69 | one-time |


### PD Meter

[App page](https://appshunter.io/ios/app/pd-meter/id1497268134)

This application uses AI technology to measure interpupillary distance accurately. It offers a contactless method for measurement, avoiding close proximity required by traditional devices. Users can manually correct any AI recognition errors for precise results.

**Highlights:** AI-powered binocular interpupillary measurement, Contactless measurement method, High accuracy (0.1mm), Manual error correction, Supports FPD and NPD measurements

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bark free?

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

### Is PD Meter free?

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

### Which has better reviews, Bark or PD Meter?

Bark is rated higher. Bark averages 4.9 out of 5 from 109 ratings, while PD Meter averages 2.0 from 4 ratings.

### Do Bark or PD Meter have ads?

Neither Bark nor PD Meter shows ads.

### Which is updated more often, Bark or PD Meter?

Bark ships an update every 3 weeks, and PD Meter monthly. Most recently, Bark was updated on October 14, 2026 and PD Meter on October 5, 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.*