# Line Hum vs Air Synth

The clearest difference is rating: Air Synth at 5.0 against Line Hum's 4.8. Air Synth also leads on update cadence (every 2 months vs every 4 months). Line Hum's advantage is ratings volume (6 vs 1) and device support (3 vs 1). On ads, in-app purchases and monetization model there is nothing between them.

Line Hum costs $0.99 and Air Synth $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Air Synth holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Line Hum has 6 ratings behind it against 1, so its average is the more settled of the two.

Line Hum ships an update every 4 months, Air Synth every 2 months. The most recent releases landed on October 13, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Line Hum | Air Synth |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | [4.8 (6 ratings)](https://appshunter.io/ios/app/line-hum/id1551681272/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/air-synth/id6746959898/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 13 MB | 43 MB |
| Requires iOS | **12.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Henry Lowengard](https://appshunter.io/developer/288419654) | [Air Dev](https://appshunter.io/developer/1819194799) |

## What reviewers say

### Line Hum

[App page](https://appshunter.io/ios/app/line-hum/id1551681272)

This audio unit plugin adds authentic analog noise and distorted wave forms to your music productions. It can drone on any frequency and ring modulate input for added distortion, offering a unique sound for electronic music creators.

**Highlights:** Authentic analog noise, Synthesized analog instruments, Noisy wave forms, Drones on any frequency, Ring modulation, Distortion effects

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

**In-app purchases:** none


### Air Synth

[App page](https://appshunter.io/ios/app/air-synth/id6746959898)

Transform your phone into a motion-controlled musical instrument. Explore a simplified mode for younger users or dive into advanced synthesis features. Experience expressive soundscapes controlled by your movements.

**Highlights:** Motion-controlled pitch and effects, Camera, gyroscope, and accelerometer tracking, Adjustable sensitivity settings, Diverse expressive presets, Advanced synthesis parameters (oscillators, LFO, filters), Simplified mode for kids, Save custom presets

**In-app purchases:** none


## Frequently asked questions

### Is Line Hum free?

Line Hum costs $0.99, with no in-app purchases.

### Is Air Synth free?

Air Synth costs $1.99, with no in-app purchases.

### Which has better reviews, Line Hum or Air Synth?

Air Synth is rated higher. Line Hum averages 4.8 out of 5 from 6 ratings, while Air Synth averages 5.0 from 1 ratings.

### Do Line Hum or Air Synth have ads?

Neither Line Hum nor Air Synth shows ads.

### Which is updated more often, Line Hum or Air Synth?

Line Hum ships an update every 4 months, and Air Synth every 2 months. Most recently, Line Hum was updated on October 13, 2026 and Air Synth on September 23, 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.*