JAX SR vs VAPolyMT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JAX SR
This audio effect processor allows selective frequency range processing for modulation effects. It offers a classic chorus with MIDI control and aims to avoid negative side effects by targeting specific frequency bands.
- Selective frequency range processing
- Classic chorus modulation
- Optional direct MIDI control
- Universal app for multiple Apple platforms
- Avoids negative side effects of full-range effects
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The manual is available at : https://audio.digitster.com/wp-content/uploads/2024/05/JAX-SR-Chorus-Manual.pdf The JAX SR Series are AudioUnits (AUv3), which allow to select a frequency range for effect processing. This one provides a classic chorus modulation effect with optional direct MIDI control assignment to the parameters. If (especially) modulation effects are applied to the entire frequency range, this usually will introduce negative side effects. The JAX [SR] Series allow a selective frequency range and dynamic adjustment of the mix easily. More information can be found on the product website at: https://audio.digitster.com/ Please note, that AudioUnits (AUv3) require a supporting host application to perform. This build (like all our latest releases) is truly 'universal', meaning, the audio unit is available for: - MacOS (Apple Silicon) - iOS (all actual iPhones) - iPadOS (all actual iPads) - visionOS (Apple Vision Pro) Requirements: MacOS 10.15++ iOS 14.0++
VAPolyMT
This powerful synthesizer app offers bi-timbral polyphony with analog-style sequencers and assignable macro controls. It functions as a standalone application or an AudioUnit Extension, supporting MIDI, Ableton Link, and audio export. Project files are savable via iCloud Drive for cross-platform access.
- Bi-timbral polyphonic synthesizer
- Analog-style step sequencer per timbre
- Assignable macro controls
- AudioUnit Extension (AUv3) support
- Ableton Link and MIDI support
- iCloud Drive project sharing
- Built-in effects and piano roll editor
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VAPolyMT is a bi-timbral polyphonic synthesizer for iPhone, iPad and Mac. It features analog style step sequencer per timbre and assignable macro controls. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. Each synthesizer consists of two oscillators, mixer, resonant low pass filter, resonant hight pass filter and amplifier. The synthesizers can be layered or can be split. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. VAPolyMT also includes sequencer which features piano roll editor and parameter automation. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. Main Features Bi-timbral polyphonic subtractive synthesizer. Analog Style Step Sequencer per timbre. Eight Assignable Controllers. Maximum 8 voice polyphony. it depends on performance of the device it is running. Built-in effects and piano roll sequencer. Support Audio Unit Extension (AUv3). Support MIDI 2.0. Support Foot Pedal and Per Note Control. Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Ableton Link, Bluetooth MIDI, MIDI In / Out. Include more than 200 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 macOS 14.0 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
The clearest difference is update cadence: JAX SR at monthly against VAPolyMT's every 11 months. JAX SR also leads on iOS requirement (14.0 vs 16.6). VAPolyMT's advantage is price ($3.99 vs $6.99) and ratings volume (4 vs 1). On rating, ads, in-app purchases and monetization model 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
JAX SR costs $6.99 and VAPolyMT $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for JAX SR against 5.0 for VAPolyMT. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
JAX SR ships an update monthly, VAPolyMT every 11 months. The most recent releases landed on September 23, 2026 and October 26, 2026 respectively.
| Parameter | JAX SR | VAPolyMT |
|---|---|---|
| Price | $6.99 | $3.99 — better |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 4 — better |
| Update frequency | Monthly — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 14.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 21 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Guell | Ryo Togawa |
Customer experience
JAX SR
VAPolyMT
In-app purchases
JAX SR
No in-app purchases
VAPolyMT
No in-app purchases
Questions
Is JAX SR free?
Is VAPolyMT free?
Which has better reviews, JAX SR or VAPolyMT?
Do JAX SR or VAPolyMT have ads?
Which is updated more often, JAX SR or VAPolyMT?
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