# Line Hum vs VAPolyTZFM

Line Hum and VAPolyTZFM both sit at 4.8 stars, but that hides the real split: 100% of Line Hum's written reviews are positive against 50% of VAPolyTZFM's. Line Hum also leads on price ($0.99 vs $14.99) and update cadence (every 4 months vs every 9 months). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Line Hum costs $0.99 and VAPolyTZFM $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VAPolyTZFM holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews complicate that: 100% of Line Hum's written reviews are positive against 50% of VAPolyTZFM's, so the app with the better star average is not the one people write more warmly about.

Line Hum ships an update every 4 months, VAPolyTZFM every 9 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Line Hum | VAPolyTZFM |
| --- | --- | --- |
| Price | **$0.99** | $14.99 |
| Rating | [4.8 (6 ratings)](https://appshunter.io/ios/app/line-hum/id1551681272/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/vapolytzfm/id6747690642/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | Paid | Paid |
| Size | 13 MB | 17 MB |
| Requires iOS | **12.4** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Henry Lowengard](https://appshunter.io/developer/288419654) | [Ryo Togawa](https://appshunter.io/developer/1474193056) |

## 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


### VAPolyTZFM

[App page](https://appshunter.io/ios/app/vapolytzfm/id6747690642)

This app is a polyphonic synthesizer that utilizes Through Zero FM for musical sound generation. It offers a standalone mode with Ableton Link and MIDI support, as well as an AudioUnit Extension for use with other music software. Built-in effects and iCloud Drive integration enhance its creative capabilities.

**Highlights:** Through Zero FM synthesis, AudioUnit Extension (AUv3) support, Ableton Link and MIDI connectivity, Built-in effects suite, iCloud Drive project sharing, Analog style step sequencer, Up to 8 voice polyphony

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Line Hum free?

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

### Is VAPolyTZFM free?

VAPolyTZFM costs $14.99, with no in-app purchases.

### Which has better reviews, Line Hum or VAPolyTZFM?

VAPolyTZFM is rated higher. Line Hum averages 4.8 out of 5 from 6 ratings, while VAPolyTZFM averages 5.0 from 3 ratings.

### Do Line Hum or VAPolyTZFM have ads?

Neither Line Hum nor VAPolyTZFM shows ads.

### Which is updated more often, Line Hum or VAPolyTZFM?

Line Hum ships an update every 4 months, and VAPolyTZFM every 9 months. Most recently, Line Hum was updated on October 24, 2026 and VAPolyTZFM 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.*