# Thesys vs Harmonizer audio effect

The clearest difference is price: Thesys at Free against Harmonizer audio effect's $1.99. Thesys also leads on rating (4.7 vs 3.0) and review sentiment (59% vs 23%). Harmonizer audio effect's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads there is nothing between them.

Thesys is free to download; Harmonizer audio effect costs $1.99 up front. Thesys sells 1 one-off in-app purchase. Harmonizer audio effect asks for nothing beyond the download.

Thesys holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Thesys has 85 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 59% of Thesys's written reviews are positive against 23% of Harmonizer audio effect's.

Thesys ships an update every 3 months, Harmonizer audio effect every 8 months. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Thesys | Harmonizer audio effect |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.7 (85 ratings)](https://appshunter.io/ios/app/thesys/id655513441/reviews)** | [3.0 (9 ratings)](https://appshunter.io/ios/app/harmonizer-audio-effect/id1209475596/reviews) |
| Number of ratings | **85** | 9 |
| Positive reviews | **59.3% of reviews** | 23.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 28 MB | 14 MB |
| Requires iOS | 17.6 | **10.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sugar Bytes GmbH](https://appshunter.io/developer/614418826) | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) |

## What reviewers say

### Thesys

[App page](https://appshunter.io/ios/app/thesys/id655513441)

This app is a powerful and intuitive MIDI step sequencer for creating complex musical patterns. It offers extensive control over MIDI devices, enabling organic bass lines, leads, and pads for studio or live performance. Advanced features allow for real-time pattern manipulation directly from a MIDI keyboard.

**Highlights:** MIDI Step Sequencer, Pattern Creation, Live Performance Options, Real-time Pattern Manipulation, Integrated Synth, Action Section (Gatetime, Looper, Slowdown), Ableton Link Support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thesys Full Version | $19.99 | one-time |


### Harmonizer audio effect

[App page](https://appshunter.io/ios/app/harmonizer-audio-effect/id1209475596)

This real-time audio effect app shifts pitch and adds harmonies to your original sound. It functions as an Audio Unit plugin or a standalone effect using your device's microphone or external audio interfaces. The pitch shifting preserves the original timing and tempo.

**Highlights:** Real-time pitch shifting, Two harmony voices, Smooth pitch shift controls, Adjustable voice volumes, Master reverb effect, Standalone mode via microphone

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Thesys free?

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

### Is Harmonizer audio effect free?

Harmonizer audio effect costs $1.99, with no in-app purchases.

### Which has better reviews, Thesys or Harmonizer audio effect?

Thesys is rated higher. Thesys averages 4.7 out of 5 from 85 ratings, while Harmonizer audio effect averages 3.0 from 9 ratings.

### Do Thesys or Harmonizer audio effect have ads?

Neither Thesys nor Harmonizer audio effect shows ads.

### Which is updated more often, Thesys or Harmonizer audio effect?

Thesys ships an update every 3 months, and Harmonizer audio effect every 8 months. Most recently, Thesys was updated on October 8, 2026 and Harmonizer audio effect on October 7, 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.*