# P.M.M.D Calculator vs Volume Master

The clearest difference is price: Volume Master at Free against P.M.M.D Calculator's $3.99. Volume Master also leads on update cadence (every 2 months vs every 22 months). P.M.M.D Calculator's advantage is in-app purchases (none vs 1) and iOS requirement (13 vs 16.0). On ads and device support there is nothing between them.

Volume Master is free to download; P.M.M.D Calculator costs $3.99 up front. Volume Master sells 1 one-off in-app purchase. P.M.M.D Calculator asks for nothing beyond the download.

P.M.M.D Calculator ships an update every 22 months, Volume Master every 2 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | P.M.M.D Calculator | Volume Master |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[4.2 (216 ratings)](https://appshunter.io/ios/app/volume-master-volume-control/id6475276906/reviews)** |
| Number of ratings | — | **216** |
| Positive reviews | — | 54.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 4 MB |
| Requires iOS | **13** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Heng Jia Liang](https://appshunter.io/developer/1532000635) | [娜 张](https://appshunter.io/developer/1517893827) |

## What reviewers say

### P.M.M.D Calculator

[App page](https://appshunter.io/ios/app/pmmd-calculator/id1631470538)

**Features:** macOS Compatibility

**In-app purchases:** none


### Volume Master

[App page](https://appshunter.io/ios/app/volume-master-volume-control/id6475276906)

Easily set and manage your preferred audio levels for music, videos, and audiobooks. Save favorite volume settings for quick access and add them to your home screen for instant recall.

**Highlights:** Set custom volume levels, Manage favorite volume settings, Add favorites to home screen, Quick access to saved volumes, Control music, video, and audiobook volume

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is P.M.M.D Calculator free?

P.M.M.D Calculator costs $3.99, with no in-app purchases.

### Is Volume Master free?

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

### Do P.M.M.D Calculator or Volume Master have ads?

Neither P.M.M.D Calculator nor Volume Master shows ads.

### Which is updated more often, P.M.M.D Calculator or Volume Master?

P.M.M.D Calculator ships an update every 22 months, and Volume Master every 2 months. Most recently, P.M.M.D Calculator was updated on October 27, 2026 and Volume Master on October 27, 2026.

---

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