ButterSynth vs BLEASS Megalit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
BLEASS Megalit
This powerful music synthesizer offers a vast sonic palette with advanced wavetable and subtractive oscillators, flexible filtering, and extensive modulation sources. Its intuitive interface makes complex sound design accessible to all musicians.
- Advanced wavetable oscillators
- Per-oscillator unison mode
- Noise generator with filtering
- Resonant filters and waveshaper
- Multiple LFOs for complex modulation
- Motion Sequencer for repeating patterns
- Built-in multi-band compressor
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With its blend of wavetable and classic subtractive oscillators, flexible filtering and post-processing, and an extensive set of advanced modulation sources, BLEASS Megalit provides sound designers with a vast palette of timbral tints, shades, and colours to explore. Thanks to BLEASS' super-intuitive interface design, that entire sonic palette is within easy reach of even the most non-technical musicians. Megalit includes many innovations that will empower your sound designs: * Advanced wavetable oscillators with independent wavetable position and Fold controls across more than 130 wavetables. * Per-oscillator Unison mode for creating rich, layered sounds without loading additional synth instances. * Dedicated noise generator with high-pass and low-pass filters for flexible non-tonal sounds and sound components. * Resonant high-pass and low-pass filters, plus built-in Waveshaper and Bit Crusher processors for powerful sound shaping. * Four LFOs with independent timing curves and output smoothing for highly detailed modulation. * Advanced Motion Sequencer for creating complex repeating modulation patterns. * Per-patch performance controller response curves for expressive and predictable playability. * Built-in preset randomizer that generates inspiring, usable sounds at the touch of a button. * Built-in multiband upward/downward compressor for precise control over dynamics, punch, and presence. All of Megalit's parameters, settings, and controls are presented with intuitive visual feedback, so you always know exactly what the synth is doing. Despite its immense sonic capabilities, Megalit remains exceptionally CPU-efficient, leaving plenty of headroom for additional instruments, effects, or simply more instances of Megalit. BLEASS Megalit is available as an AUv3 plug-in or standalone app. Also available for Windows and Mac. More information: https://www.bleass.com/megalit
Screenshots
Verdict
The clearest difference is rating: BLEASS Megalit at 4.6 against ButterSynth's 4.0. BLEASS Megalit also leads on review sentiment (72% vs 60%). ButterSynth's advantage is in-app purchases (none vs 13) and update cadence (every 2 months vs every 6 months). On price, ratings volume, ads 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
ButterSynth costs $19.99 and BLEASS Megalit $19.99 up front. BLEASS Megalit sells 13 one-off in-app purchases. ButterSynth asks for nothing beyond the download.
BLEASS Megalit holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 62 and 32 respectively. Written reviews point the same way: 60% of ButterSynth's written reviews are positive against 72% of BLEASS Megalit's.
ButterSynth ships an update every 2 months, BLEASS Megalit every 6 months. The most recent releases landed on September 16, 2026 and September 20, 2026 respectively.
| Parameter | ButterSynth | BLEASS Megalit |
|---|---|---|
| Price | $19.99 | $19.99 |
| Rating | 4.0 (62 ratings) | 4.6 (32 ratings) — better |
| Positive reviews | 59.6% of reviews | 72.2% of reviews — better |
| Number of ratings | 62 — better | 32 |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Paid |
| Best chart rank | #190 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 468 MB | 172 MB |
| Age rating | 4+ | 4+ |
| Developer | Arto Vaarala | BLEASS |
Customer experience
ButterSynth
BLEASS Megalit
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
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- 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 moreShow fewer
- 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
BLEASS Megalit
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ButterSynth
No in-app purchases
BLEASS Megalit
- Electronisounds Presets PackFree
- Conrad Keely Preset PackFree
- FXs & Risers Preset PackFree
Show 10 moreShow fewer
- Oddity Preset Pack$0.99
- Lektrique Preset Pack$0.99
- Pogman Preset Pack$1.99
- VNR Preset Pack$1.99
- Instant Sounds Preset Pack$1.99
- ERAE Preset Pack$3.99
- Megalight Preset Pack$3.99
- Expressive Presets Pack #1$3.99
- The Sound Test Room Pack$3.99
- The Sound Test Room Pack #2$4.99
Questions
Is ButterSynth free?
Is BLEASS Megalit free?
Which has better reviews, ButterSynth or BLEASS Megalit?
Do ButterSynth or BLEASS Megalit have ads?
Which is updated more often, ButterSynth or BLEASS Megalit?
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