Comparison

ButterSynth vs Salome

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

Salome

This app lets you record or import sounds, transform them into seamless loops, and play them polyphonically using MPE or MIDI controllers. It offers a fast workflow with onscreen keypads and MPE/MIDI input/output for creative sound manipulation.

Highlights
  • Record or import sounds
  • Create seamless loops
  • Polyphonic MPE/MIDI playback
  • Onscreen MPE keypads
  • Latch mode for fader control
  • AUv3 plugin for iOS and macOS
Read full description

Salome is a tool for recording (or importing) sounds, turning them into seamless loops, and then polyphonically play them using MPE or MIDI. CONTROL: The onscreen keypads can be latched, turning them into 2-dimensional faders for controlling various modulations. Additionally, software and hardware MPE controllers can be used (or normal MIDI, in a pinch). WORKFLOW: The entire process from sampling to playing was designed to be a fast and fluid as possible. Speed > features. UNIVERSAL: AUv3 plugins for iOS (iPhone, iPad) and MacOS (ARM, Intel) are included*. - Full Audio Unit compatibility (note that not all hosts support all AU features) - Built-in MPE keypads for multidimensional onscreen control - MPE/MIDI input and output from the Audio Unit, so you can record your performance or even control other MPE synths - 12 mode filter, based on the Oberheim Xpander design - Latch-mode lets you play the instrument using faders - Basic standalone mode included (for connectivity use the AU plugin) - Record or import sounds (WAV, AIF, MP3) and instantly play them as a polyphonic instrument - Effortless seamless loops using the non-destructive X-Fade feature Find the user manual on ruismaker.com * not all MacOS DAWs fully support Audio Unit plugins. This is not a VST plugin.

Screenshots

ButterSynth4 screens
Salome3 screens

Verdict

The call

The clearest difference is price: Salome at $7.99 against ButterSynth's $19.99. Salome also leads on rating (4.7 vs 4.0) and update cadence (every 9 days vs every 2 months). 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

CostPrice · In-app purchases · Ads · Monetization

ButterSynth costs $19.99 and Salome $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Salome holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 63 and 30 respectively. Written reviews point the same way: 59% of ButterSynth's written reviews are positive against 83% of Salome's.

UpkeepUpdate frequency

ButterSynth ships an update every 2 months, Salome every 9 days. Both last shipped on November 7, 2026.

Scorecard4 real differences · 6 level
ButterSynth versus Salome: the parameters behind the verdict, then further details
ParameterButterSynthSalome
Price$19.99$7.99 — better
Rating4.0 (63 ratings)4.7 (30 ratings) — better
Positive reviews59.2% of reviews83.3% of reviews — better
Number of ratings63 — better30
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS14.013 — better
Further details — not scored
Size468 MB37 MB
Age rating4+4+
DeveloperArto VaaralaBram Bos

Customer experience

ButterSynth

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

Salome

All ratings30 ratings
Positive90.0%
Neutral3.3%
Negative6.7%
Written reviews18 reviews
Positive83.3%
Neutral11.1%
Negative5.6%

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

Salome

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ButterSynth

No in-app purchases

None

Salome

No in-app purchases

Questions

Is ButterSynth free?
ButterSynth costs $19.99, with no in-app purchases.
Is Salome free?
Salome costs $7.99, with no in-app purchases.
Which has better reviews, ButterSynth or Salome?
Salome is rated higher. ButterSynth averages 4.0 out of 5 from 63 ratings, while Salome averages 4.7 from 30 ratings.
Do ButterSynth or Salome have ads?
Neither ButterSynth nor Salome shows ads.
Which is updated more often, ButterSynth or Salome?
ButterSynth ships an update every 2 months, and Salome every 9 days. Most recently, ButterSynth was updated on November 7, 2026 and Salome on November 7, 2026.

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