# DDP Player vs Harmony Calipers

The clearest difference is price: DDP Player at Free against Harmony Calipers's $4.99. DDP Player also leads on iOS requirement (9.0 vs 16.0). Harmony Calipers's advantage is update cadence (monthly vs every 3 months). On ads, in-app purchases and device support there is nothing between them.

DDP Player is free to download; Harmony Calipers costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DDP Player ships an update every 3 months, Harmony Calipers monthly. The most recent releases landed on September 29, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | DDP Player | Harmony Calipers |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/ddp-player/id997565364/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | — |
| Size | 11 MB | 9 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pieter Stenekes](https://appshunter.io/developer/997565363) | [Salvatore Angelone](https://appshunter.io/developer/1896278497) |

## What reviewers say

### DDP Player

[App page](https://appshunter.io/ios/app/ddp-player/id997565364)

Listen to DDP images on your Apple device. This app allows artists and producers to review masters, checking CD text, ISRC codes, and track spacing. It supports loading DDPs from cloud storage, clipboard links, or iTunes.

**Highlights:** Reads DDP images, Supports industry-standard DDP protocol, Loads DDPs from Dropbox, clipboard, or iTunes, Displays CD text and ISRC codes, Shows track numbering and spacing, Requires desktop or OEM serial number/key

**Features:** macOS Compatibility

**In-app purchases:** none


### Harmony Calipers

[App page](https://appshunter.io/ios/app/harmony-calipers/id6794780361)

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

**In-app purchases:** none


## Frequently asked questions

### Is DDP Player free?

DDP Player is free to download, with no in-app purchases.

### Is Harmony Calipers free?

Harmony Calipers costs $4.99, with no in-app purchases.

### Do DDP Player or Harmony Calipers have ads?

Neither DDP Player nor Harmony Calipers shows ads.

### Which is updated more often, DDP Player or Harmony Calipers?

DDP Player ships an update every 3 months, and Harmony Calipers monthly. Most recently, DDP Player was updated on September 29, 2026 and Harmony Calipers on October 12, 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.*