# Harmonitron vs KP Viewer

The clearest difference is price: Harmonitron at $2.99 against KP Viewer's $19.99. KP Viewer's advantage is iOS requirement (15.0 vs 17.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Harmonitron costs $2.99 and KP Viewer $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Harmonitron against 5.0 for KP Viewer. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

## The numbers

| Metric | Harmonitron | KP Viewer |
| --- | --- | --- |
| Price | **$2.99** | $19.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/harmonitron/id6790326853/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/kp-viewer/id6807597087/reviews) |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Monetization | Paid | Paid |
| Size | 3 MB | 3 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Konstantin Torsten Schutz](https://appshunter.io/developer/6778600016) | [DEREK BERNARD](https://appshunter.io/developer/6807597090) |

## What reviewers say

### Harmonitron

[App page](https://appshunter.io/ios/app/harmonitron/id6790326853)

This app creates a rich, swirling harmonic tremolo effect, distinct from standard volume pulsing. It splits sound into low and high bands, modulating them in opposite phases for a lush, phaser-like character. Apply it to various instruments or full mixes as a standalone app or AUv3 effect.

**Highlights:** True harmonic tremolo with anti-phase modulation, Voice control for morphing between classic and harmonic tremolo, Split & Tilt for band crossover and balance, Tube Drive and tone shaping, Adjustable Rate and LFO Shapes, Tempo Sync with musical note divisions, Stereo Spread for auto-pan and width

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

**In-app purchases:** none


### KP Viewer

[App page](https://appshunter.io/ios/app/kp-viewer/id6807597087)

This app provides a clear, at-a-glance display for Kemper Profiler Player users during live performances. It shows current bank, rig name, effect status, morph status, and an automatic tuner, turning older devices into a dedicated stage display.

**Highlights:** Live performance display, Bank and Rig information, Rig name display, Effect status indicators, Automatic tuner, Dedicated stage display

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

**In-app purchases:** none


## Frequently asked questions

### Is Harmonitron free?

Harmonitron costs $2.99, with no in-app purchases.

### Is KP Viewer free?

KP Viewer costs $19.99, with no in-app purchases.

### Which has better reviews, Harmonitron or KP Viewer?

Harmonitron and KP Viewer are both rated 5.0 out of 5 on the App Store, from 2 and 3 ratings respectively.

### Do Harmonitron or KP Viewer have ads?

Neither Harmonitron nor KP Viewer shows ads.

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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.*