Comparison

ButterSynth vs VS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ButterSynth

This powerful synthesizer app offers a hybrid approach, combining wavetable, FM, and sample-based synthesis. Create unique sounds with a vast sonic range, advanced modulation, and a built-in effects rack. It caters to both experienced sound designers and beginners with extensive presets.

Highlights
  • Hybrid 6-oscillator synthesis (wavetable, FM, sample)
  • Built-in wavetable editor
  • FM engine with 4 operators
  • Sample and Granulator engines
  • 32-slot modulation matrix
  • Internal FX rack with 16 modules
  • Extensive preset library
Features
Read full description

ButterSynth is a hybrid 6-oscillator wavetable/FM/sample-based AUV3 and standalone synthesizer with a vast sonic range, from gentle pads to screaming leads and basslines. Mix any combination of wavetable, FM, sample and other synthesis engines for one truly massive sound. For the more advanced users, you'll love using ButterSynth's thoughtfully designed interface, incredibly powerful modulation matrix, fully-featured internal FX rack, factory waveform and sample libraries, and almost limitless scope for fun, experimentation and sound design. For less experienced synth programmers, ButterSynth includes a library of hundreds of ready-to-use presets, sparking your creativity to start making music right away. Headline features include - Mix and match any combination of 6 synthesis engines to either emulate your favourite synths of yester-year or build a synth ready for the future. - Dual-wavetable engines also feature 9 phase modes, wave folding, and deep unison controls modelled on vintage hardware synths. - Built-in wavetable editor gives you the ability to tweak, morph, and hand-draw your own custom wavetables, with each wavetable supporting up to 256 frames. - FM engine offers 4 operators with a selection of 12 modulation paths. Each operator can be loaded with any waveform from the factory or user library, and can also self-modulate via the feedback dial. - Sample and Granulator engines both let you load samples (either imported or from the factory library) and control precisely how they are chopped, triggered and layered. Both also feature the same powerful unison modes available in the WT engine. - Highly configurable 32-slot modulation matrix featuring precise mix/max ranges, self-modulation (via the amount target), plus configurable response curves and layer modes. Simply long-tap any parameter to set it as a Mod destination! - Full suite of versatile control sources which includes: 4x MSEG-style looping curve envelopes, 4x LFOs, 4x step sequencers, X/Y pad with motion recording, 8x Macro dials and a powerful arpeggiator inspired by Kirnu Interactive’s Cream. - The EFX rack lets you build your own insert effects chain using any combination of the 16 built-in FX modules. Modules available at launch include delay, reverb, distortion, chorus, OTT compression etc. Note - FX parameters can also be targeted by the mod matrix, unlocking the possibility to program ‘per voice’ modulated effects. - All presets, wavetables, samples and other settings are stored in the Files app, making bulk import/export, backup and community sharing quick and easy. - All of this is housed in an irresistibly designed 4-tab UI that makes synth programming quick and fun.

About

VS

Generate dynamic, audio-reactive visuals for your music projects. This app offers extensive customization with layers, shaders, images, and video, allowing you to perform visuals live or record them for your tracks. Integrate seamlessly with DAWs and external displays.

Highlights
  • 8 polyphonic visual layers
  • Shader, image, and video materials
  • Modulation matrix
  • AUv3 plugin support
  • Live performance output
  • Built-in video recorder
  • Custom shader editor
Features
Read full description

VS provides a creative way to generate beautiful graphical representations of your music projects. Driven by both audio and MIDI data, VS is the visual equivalent of a traditional synthesizer. VS takes the concept of music visualisation to a whole new level of customisation and expression, putting you in control and giving you the power to perform however you want. VS is powered by 8 flexible layers which can use shaders, images or videos, allowing you to create generative graphics that you can interact with and layer on top of each other to create complex evolving visuals. With customizable parameters, a modulation matrix and an array of blend modes, use your audio and/or MIDI to trigger and manipulate your layers accordingly with your music. You can even import and create your own shaders to give your visuals a more personal feeling. As the name suggests, VS - Visual Synthesizer can be played live like an audio synthesizer; use your MIDI keyboard to make each layer come alive with the concept of ‘polyphonic visual voices’. As well as a standalone app, VS includes an AUv3 plugin version, so you can run it directly inside your favourite iOS DAW programs like AUM, Drambo, BAM, Cubasis, Loopy Pro, Groove Rider 2, Logic Pro etc. You can now give your existing projects a visual touch of creativity. Simply route the MIDI and audio of your tracks and watch the magic happen. You can connect your mobile device to an external screen or projector for a live visual performance. If you prefer to create a video for your music, the built-in recorder lets you capture both visuals and audio. Record in landscape or portrait mode, with multiple output resolutions available. We partnered with new media artist ‘Perplex On’ to bring you a factory preset bank full of amazing interactive visuals you can start using right away to create dazzling animations and make your music move in a whole new medium. With an ever growing collection of expansions, you can further augment your visual arsenal with preset packs created by handpicked new media art talents. Features: - 8 Polyphonic visual layers (with blend modes) - 4 voices per layer - 32 built-in material effects - Layer material can be a shader, image or a video - Background layer with solid color/image/video - 4 LFO’s with SIN, SQR, TRI, SAW, S&H and filtered S&H - 2 EG’s with ADSR controls - 4 Dual-mode Audio Modulators (envelope and frequency band detection) - Modulation matrix - Full Screen mode - HDMI output for external screen/projector - NDI output - Built-in audio player with MIDI support - Built-in video recorder - Built-in material code editor for custom material creation - Exclusive factory presets by Perplex On

Screenshots

ButterSynth4 screens
VS4 screens

Verdict

The call

The clearest difference is rating: VS at 4.6 against ButterSynth's 4.0. VS also leads on review sentiment (80% vs 59%). ButterSynth's advantage is in-app purchases (none vs 6) and price ($19.99 vs $24.99). On ratings volume, update cadence, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

ButterSynth costs $19.99 and VS $24.99 up front. VS sells 6 one-off in-app purchases. ButterSynth asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

VS holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 63 and 125 respectively. Written reviews point the same way: 59% of ButterSynth's written reviews are positive against 80% of VS's.

UpkeepUpdate frequency

ButterSynth ships an update every 2 months, VS every 6 weeks. The most recent releases landed on October 21, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
ButterSynth versus VS: the parameters behind the verdict, then further details
ParameterButterSynthVS
Price$19.99 — better$24.99
Rating4.0 (63 ratings)4.6 (125 ratings) — better
Positive reviews59.2% of reviews80.4% of reviews — better
Number of ratings63125 — better
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.1
Further details — not scored
Size468 MB787 MB
Age rating4++4
DeveloperArto VaaralaImaginando Lda

Customer experience

ButterSynth

All ratings63 ratings
Positive73.0%
Neutral7.9%
Negative19.0%
Written reviews71 reviews
Positive59.2%
Neutral11.3%
Negative29.6%

VS

All ratings125 ratings
Positive91.2%
Neutral1.6%
Negative7.2%
Written reviews51 reviews
Positive80.4%
Neutral3.9%
Negative15.7%

User reviews

ButterSynth

From 63 App Store ratings

What we love

  • ✨ Deep sound design capabilities
  • 🎛️ Versatile modulation matrix
  • 🔊 Great sound quality
  • 💡 Innovative wavetable generator
  • 🌟 Serum-like experience

Room to improve

  • 📱 Fiddly on small screens
  • 🐛 Crashes frequently
  • 🐛 Disappears in Cubasis
  • 🐛 Spikes CPU usage
  • 🐛 Crashes on patch change

VS

From 125 App Store ratings

What we love

  • ✨ Awesome audiovisual workflow
  • 💡 Powerful yet easy to use
  • 🎨 Great for getting vibes out
  • 🌟 Expands musical aspirations visually
  • 🎛️ Easy to work with (Imaginando apps)

Room to improve

  • 🐛 No elegant way for live synchronized video out
  • 🔌 Popout to external displays only in standalone app
  • 🚫 Standalone app can't run in background
  • 🎛️ Doesn't work well plugged into looper or DAW
  • ❌ Not fun at all

Bugs and requests

ButterSynth

Reported bugs

39 issues
  • App crashing with AUM
  • Disappears in Cubasis randomly
  • Crashes all the time inside Logic
  • Changing a patch spikes CPU to 99%
  • Crashes on every patch change
Show 34 more
  • No audio when rendering or freezing track
  • Keyboard doesn't load on iPhone
  • iOS18 broke ButterSynth (audio recording issues)
  • Failed to load as Auv3
  • Crashes as soon as a preset is selected
  • Some patches hanging/sounding without input
  • CPU spikes to 100% on preset switching
  • Audio crackles on preset switching
  • Sample module has consistent buzz
  • LFOs are extremely simple (no phase offset)
  • Square wave LFO is not square (has slew)
  • Step sequencer always has glide/slew
  • Cannot save custom presets
  • No undo function in wave table editor
  • AUv3 plugin resets when ButterSynth crashes
  • Does not show up as auv3 in Cubasis, AUM, or Audio Evolution
  • Crashes regularly even on newest iPad
  • Preset changes every time play is pressed
  • Not resizing appropriately on smaller screens
  • Crashes with unison function in AUM
  • White noise on crash with unison
  • Sound continues after song stops in GarageBand
  • Preset changes on stop, rewind, or play in GarageBand
  • Keeps crashing in GarageBand (AUv3)
  • Patches in standalone sound different as AUv3
  • Crashes when hitting play with arpeggiator/sequencer on iPhone
  • No keyboard appears in iPhone standalone mode
  • Audio Unit Extension quit error on export
  • Lots of crashes in standalone and hosted in AUM
  • MIDI not working
  • Automation still doesn’t work in Logic Pro
  • Random LFO is great for recording sequences
  • Preset browser closes each time a new preset is selected
  • Works as AUv3 after starting in standalone mode

Requested features

20 requests
  • MPE popup possible on top of the auv3
  • Button to hide built-in keyboard
  • Buffer size option
  • Additional MIDI mappings (e.g., arpeggiator toggle)
  • Sustain pedal support
Show 15 more
  • Longer LFO speed for evolving soundscapes
  • Alternative skins/color themes
  • Pinable preset browser
  • Virtual keyboard to remain active while browser is pinned
  • Make app take up whole screen (no black borders)
  • Master detune
  • Parameter lock
  • More presets
  • Fix square wave LFO to be truly square
  • Fix step sequencer glide/slew for discrete steps
  • Undo function in wave table editor
  • Filter key follow button
  • Adjust envelope curves (especially release)
  • Easier way to adjust modulation matrix amount
  • Phase distortion inclusion

VS

Reported bugs

15 issues
  • No elegant way to get live synchronized video out
  • Popout to external displays only in standalone app, which can’t run in background
  • Video record export issue: videos are 30+ minutes when recorded for shorter duration
  • NDI stream not working
  • App crashes frequently
Show 10 more
  • Cannot cope with 'large' MP3 files (around 10MB)
  • No way to seek to anywhere but the beginning of audio files
  • Does not support .aiff files (only .aif)
  • Missing Bluetooth MIDI support
  • App is not smooth and freezes
  • No MP3 support
  • Jaggy and slow performance with video file background and one material layer
  • Unresponsive interface and frame rate drops with HD video
  • In-app help does not work
  • AUv3 mode displays AUM stuff and app menus, destroying aesthetics

Requested features

20 requests
  • Integrate an audio tool for Spotify/other audio sources
  • Allow using any graphic or photo content as a layer
  • Hope for Metal rendering for super performance shaders
  • More ways to interact between layers (displacement, feedback)
  • Post-processing effects (luma key, feedback, kaleidoscope, mirror)
Show 15 more
  • Option to load videos and images in layers other than B layer
  • More flexible/bigger choice of MIDI controllable artifacts
  • Use MIDI to trigger pre-programmed words
  • Ability to change font size in materials code editor
  • Pause and resume feature for audio playback
  • Ability to set play cursor anywhere in the middle of the file
  • iCloud file sharing
  • HDMI output for live use
  • Save audio file with the patch in standalone mode
  • Deeper mutating possibilities for items
  • Other textural possibilities with imported images
  • More mod sources for audio reactivity, device tilt, camera brightness, gestures
  • Option to create own materials from scratch (shader coding)
  • Cover the whole display in AUv3 mode (e.g., two-finger double tap)
  • Add shaders to the library

In-app purchases

None

ButterSynth

No in-app purchases

6 purchases

VS

One-time6
  • Retina Refill Preset Pack$17.99
  • Textural Memories Preset Pack$17.99
  • Cyber Spells Preset Pack$17.99
Show 3 more
  • Retro Riot Preset Pack$17.99
  • Raw Reflections Preset Pack$17.99
  • Noir Cuts Preset Packs$17.99

Questions

Is ButterSynth free?
ButterSynth costs $19.99, with no in-app purchases.
Is VS free?
VS costs $24.99, and also offers in-app purchases.
Which has better reviews, ButterSynth or VS?
VS is rated higher. ButterSynth averages 4.0 out of 5 from 63 ratings, while VS averages 4.6 from 125 ratings.
Do ButterSynth or VS have ads?
Neither ButterSynth nor VS shows ads.
Which is updated more often, ButterSynth or VS?
ButterSynth ships an update every 2 months, and VS every 6 weeks. Most recently, ButterSynth was updated on October 21, 2026 and VS on October 15, 2026.

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