voice bot vs VAPolyMkII
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
voice bot
Transform your voice into a robotic sound using a real-time channel vocoder. Shape sounds with spectral information, play live through the microphone, record loops, and apply various audio effects. Supports MIDI input and can be used standalone or as a plugin.
- Real-time channel vocoder
- Microphone input
- Audio effects (bit crusher, delay, flanger)
- MIDI support (Core MIDI, MPE)
- Standalone and AUv3 plugin
- Loop recording and playback
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Voice bot is a real time channel vocoder. A vocoder takes the spectral information of one sound also known as a modulator and uses it to shape another sound called a carrier. The resulting sound is a bit like a singing robot. Use the microphone to play live or record your own loops for playback, with a few different trigger modes using the keyboard. Further process the sound with a bit and sample crusher, delay and flanger. Play with the built in 25 key dynamic keyboard or using core MIDI with options for MPE. Run voice bot stand alone on iPad and iPhone or as a AUv3 plugin in your favourite host. Connections to other apps are also available through Audiobus and Inter Appp Audio. +++ Microphone input +++ Vocoder with up 128 filter bands +++ Polyphonic carrier source or Mono with glide settings +++ Built in 3 Oscillator carrier source, with saw, square and noise shapes +++ Record or import carrier sample loops +++ Freeze spectrum +++ Bit and sample rate crusher +++ Pitch tracking using Yin algorithm +++ 4 tap stereo delay +++ flanger +++ Multiple sample loop trigger modes +++ 25 key dynamic keyboard +++ Core Midi, Bluetooth Midi, Inter App Audio Midi and AUv3 MIDI +++ Midi CC available for all audio parameters +++ Limited MPE Midi support +++ Modulateble parameters: bands, bit crush, sample crush, delay feedback, flanger mix, vibrator and pitch bend
VAPolyMkII
This virtual analog synthesizer offers a 16-voice bitimbral polyphonic sound engine with two distinct filter models and extensive modulation options. It includes a built-in sequencer, various effects, and supports AudioUnit Extension for integration with DAWs. Projects can be synced across iPhone, iPad, and Mac via iCloud.
- 16-voice bitimbral polyphonic synthesizer
- Two analog-modeled filter types
- Extensive modulation capabilities
- Built-in piano roll sequencer
- Multiple audio effects
- AudioUnit Extension (AUv3) support
- iCloud Drive project syncing
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VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer for iPhone, iPad and Mac. It features 16 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3). Stand Alone supports Ableton Link, MIDI and audio file export. The synthesizer consists of two 8 voice synthesizer, which features two oscillators, two ADSR envelopes, resonant high pass and low pass filter and an amplifier per voice. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit and cascaded OTA filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor. The sequencer features piano roll and parameter automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. - Main Features - Virtual analog 16 voice bitimbral polyphonic synthesizer Two type of Lowpass filter, cascaded OTA model and Sallen-key model. Patch points for modulation. Support MIDI 2.0 New User Interface built by SwiftUI for improved performance. Built-in Sequencer. 16 bar patterns per clip. Total 8 clips. Piano Roll and Parameter automation. Support Audio Unit Extension (AUv3) 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. - System Requirements - A13 Fusion or above is recommended. 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 price: voice bot at $4.99 against VAPolyMkII's $14.99. voice bot also leads on rating (4.7 vs 4.5) and iOS requirement (11.0 vs 16.6). VAPolyMkII's advantage is update cadence (weekly vs every 2 months) and review sentiment (67% vs 43%). On ratings volume, 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
voice bot costs $4.99 and VAPolyMkII $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
voice bot holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 18 and 11 respectively. Written reviews complicate that: 43% of voice bot's written reviews are positive against 67% of VAPolyMkII's, so the app with the better star average is not the one people write more warmly about.
voice bot ships an update every 2 months, VAPolyMkII weekly. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.
| Parameter | voice bot | VAPolyMkII |
|---|---|---|
| Price | $4.99 — better | $14.99 |
| Rating | 4.7 (18 ratings) — better | 4.5 (11 ratings) |
| Positive reviews | 42.9% of reviews | 66.7% of reviews — better |
| Number of ratings | 18 — better | 11 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 13 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Erik Sigth | Ryo Togawa |
Customer experience
voice bot
VAPolyMkII
In-app purchases
voice bot
No in-app purchases
VAPolyMkII
No in-app purchases









