# Harmonium vs Rotary Mod

The clearest difference is rating: Rotary Mod at 4.3 against Harmonium's 3.0. Rotary Mod also leads on review sentiment (80% vs 39%) and ratings volume (23 vs 3). Harmonium's advantage is price ($0.99 vs $7.99) and update cadence (every 6 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Harmonium costs $0.99 and Rotary Mod $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rotary Mod holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Rotary Mod has 23 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 39% of Harmonium's written reviews are positive against 80% of Rotary Mod's.

Harmonium ships an update every 6 weeks, Rotary Mod every 3 months. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Harmonium | Rotary Mod |
| --- | --- | --- |
| Price | **$0.99** | $7.99 |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/harmonium/id301027289/reviews) | **[4.3 (23 ratings)](https://appshunter.io/ios/app/rotary-mod/id1463786028/reviews)** |
| Number of ratings | 3 | **23** |
| Positive reviews | 38.8% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 13 MB | 24 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [C.BARATAY](https://appshunter.io/developer/287107572) | [Eventide](https://appshunter.io/developer/546518026) |

## What reviewers say

### Harmonium

[App page](https://appshunter.io/ios/app/harmonium/id301027289)

This app provides a virtual harmonium with customizable tuning for both Indian and Western music styles. It offers two distinct sound flavors and features automatic transposition for playing in any key. Enjoy playing along with your own music library.

**Highlights:** Customizable tuning for Indian and Western scales, Two sound flavors: Traditional Harmonium & Modern Flute Organ, Automatic transposition for playing in any key, Adjustable tuning frequency (380 Hz - 470 Hz), Play along with iPhone/iPad music library, Single or double reed options

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

**In-app purchases:** none


### Rotary Mod

[App page](https://appshunter.io/ios/app/rotary-mod/id1463786028)

This app emulates a Leslie speaker, creating a pulsing vibrato effect for instruments and vocals. It offers precise control over rotor and horn speeds, cabinet size, and includes advanced features like frequency modulation and a unique Ribbon control for simultaneous parameter adjustments.

**Highlights:** Independent rotor and horn speed control, Frequency modulation with secondary LFO, Selectable cabinet size (Standard/Giant), Hicut control for tone shaping, Tap Tempo for BPM sync, Innovative Ribbon control, Mix Lock for preset scrolling

**In-app purchases:** none


## Frequently asked questions

### Is Harmonium free?

Harmonium costs $0.99, with no in-app purchases.

### Is Rotary Mod free?

Rotary Mod costs $7.99, with no in-app purchases.

### Which has better reviews, Harmonium or Rotary Mod?

Rotary Mod is rated higher. Harmonium averages 3.0 out of 5 from 3 ratings, while Rotary Mod averages 4.3 from 23 ratings.

### Do Harmonium or Rotary Mod have ads?

Neither Harmonium nor Rotary Mod shows ads.

### Which is updated more often, Harmonium or Rotary Mod?

Harmonium ships an update every 6 weeks, and Rotary Mod every 3 months. Most recently, Harmonium was updated on October 15, 2026 and Rotary Mod on October 14, 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.*