# HARMONY DSP vs SpecCheck Pro

The clearest difference is in-app purchases: HARMONY DSP at none against SpecCheck Pro's 1. HARMONY DSP also leads on iOS requirement (11.0 vs 17.6). SpecCheck Pro's advantage is update cadence (every 6 months vs every 19 months). On price, ads and device support there is nothing between them.

Both are free to download. SpecCheck Pro sells 1 one-off in-app purchase. HARMONY DSP asks for nothing beyond the download.

HARMONY DSP ships an update every 19 months, SpecCheck Pro every 6 months. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | HARMONY DSP | SpecCheck Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/speccheck-pro/id6751605124/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 6 months** |
| Size | 3 MB | 13 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APEX Italy](https://appshunter.io/developer/1446565085) | [Jaime McGauley](https://appshunter.io/developer/1814207689) |

## What reviewers say

### HARMONY DSP

[App page](https://appshunter.io/ios/app/harmony-dsp/id1638244924)

**Features:** macOS Compatibility

**In-app purchases:** none


### SpecCheck Pro

[App page](https://appshunter.io/ios/app/speccheck-pro/id6751605124)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpecCheck Premium | $4.99 | one-time |


## Frequently asked questions

### Is HARMONY DSP free?

HARMONY DSP is free to download, with no in-app purchases.

### Is SpecCheck Pro free?

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

### Do HARMONY DSP or SpecCheck Pro have ads?

Neither HARMONY DSP nor SpecCheck Pro shows ads.

### Which is updated more often, HARMONY DSP or SpecCheck Pro?

HARMONY DSP ships an update every 19 months, and SpecCheck Pro every 6 months. Most recently, HARMONY DSP was updated on October 3, 2026 and SpecCheck Pro on October 24, 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.*