Line Hum vs VAPolyTZFM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Line Hum
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.
- Authentic analog noise
- Synthesized analog instruments
- Noisy wave forms
- Drones on any frequency
- Ring modulation
- Distortion effects
Read full descriptionHide full description
Your mix is full of synthesized analog instruments - but something is missing! YES! THE SOUND OF A CABLE LYING ON THE FLOOR SOMEWHERE NEAR AN ELECTRIC LINE. Line Hum gives you this missing piece of Analog authenticity, As well as a variety of noisy wave forms, this Audio Unit is also able to just sit there and drone on any frequency and ring modulate its input for added distortion. It's actually pretty useful, especially when you run a bunch of them serially or in parallel. Because this is an Audio Unit, you need to run the (non functioning) Line Hum app to install it.
VAPolyTZFM
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.
- 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
Read full descriptionHide full description
VAPolyTZFM is polyphonic synthesizer featuring Through Zero FM, which is a type of linear frequency modulation and it is capable to maintain the pitch therefore it can deliver more musical results. VAPolyTZFM operates as a stand alone or as an AudioUnit Extension (AUv3) for iPhone, iPad and Mac. Stand Alone supports Ableton Link, MIDI and audio file export. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. Main Features Through Zero FM Analog Style Step Sequencer. Eight Assignable Controllers. Maximum 8 voice polyphony. it depends on performance of the device it is running. Built-in effects and piano roll sequencer. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Audio Unit Extension (AUv3). Support MIDI 2.0. Support Foot Pedal and Per Note Control. Support Ableton Link, Bluetooth MIDI, MIDI In / Out. Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Include 256 Factory Presets. Improvements Support MIDI Foot Pedal (CC#11, CC#64) Support MIDI2.0 Per Note Control Messages MIDI CC Settings are saved. It will be recovered when the app launched in the next time. System Requirements iOS 17.0 or later Devices with Apple Silicon are recommended. A13 Fusion or above is highly recommended. if sound is distorted when using a device with less CPU power, reduce number of voices. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Line Hum | VAPolyTZFM |
|---|---|---|
| Price | $0.99 — better | $14.99 |
| Rating | 4.8 (6 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 6 — better | 3 |
| Update frequency | Every 4 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.4 — better | 16.6 |
| Further details — not scored | ||
| Size | 13 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Henry Lowengard | Ryo Togawa |
Customer experience
Line Hum
VAPolyTZFM
In-app purchases
Line Hum
No in-app purchases
VAPolyTZFM
No in-app purchases
Questions
Is Line Hum free?
Is VAPolyTZFM free?
Which has better reviews, Line Hum or VAPolyTZFM?
Do Line Hum or VAPolyTZFM have ads?
Which is updated more often, Line Hum or VAPolyTZFM?
Other comparisons
