ButterSynth

🇺🇸 United States
Arto Vaarala  | 
27
ASO score
Text
4/100
Reviews
50/100
Graphic
60/100
Other
0/100
rating
App Rating
4.1
rating
Votes
207
rating
App Age
2y 9m
rating
Last Update
Dec 08, 2023

Compare with Category Top Apps

Metrics
Current App
Category Top Average
Difference
Rating
4.11
4.57
-10%
Number of Ratings (Voted)
207
583.3K
-100%
App Age
2y 8m
8y 4m
-67%
In-app Purchases Price
$0
$43
Update Frequency
751d
28d
+2 550%
Title Length
11
25
-56%
Subtitle Length
0
27
Description Length
2 718
2 715
+0%
Number of Screenshots
663
1246
-47 %
Size
468MB
230MB
+103 %

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Top Dec 20, 2025 Dec 27, 2025
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Ranking Keywords in United States

Keywords App Rank
Illustration
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Text ASO

Title (
Characters: 11 of 30
)
ButterSynth
Subtitle (
Characters: 0 of 30
)
Description (
Characters: 2718 of 4000
)
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.}
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Visual ASO

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Rating & Reviews

Reviews Overview
🧐 Coming Soon…
Rating
4.1
207 voters

Some Latest Reviews

AstroRaph
07 Dec, 2025
4
Amazing Synth. Great for DnB. Unfortunately one major issue for Cubasis users is that it randomly disappears from time to time leaving entire parts of your track missing. This makes it impossible to work with.
Mario Scuri
31 Aug, 2025
3
I am trying to use it as a vst in Roland Zenbeats, it crashes after a few seconds of usage. Other free plugins (king Fm) do not create the same problem. Might it be a system bug?
FastGhostMusic
03 Aug, 2025
3
This used to be my go-to synth for sound design but without even a bugfix release in over a year I’ve sadly come to the conclusion that it’s abandoned. It crashes all the time inside Logic, and desperately needs a button to hide the built in keyboard.
Burned Ice
12 May, 2025
2
This synth has great features and I love playing around with it. However right now it frequently crashes in Logic Pro. If you are building your sound it might crash when you tap to go to Logic Pro’s project overview. On reloading the project, the synth has lost all its modifications and is back to the default saw settings. There have also been random crashes when playing the synth through a MIDI track, usually clicking “Reload plugin” fixes it, but annoying nonetheless. So those are two major bugs that prevent me from recommending this synth right now. It’s may 2025 now and there haven’t been patches in a year’s time, so hopefully the dev is still supporting this product and I get to change my review soon.
Valuedcustomer8
03 May, 2025
2
Changing a patch spikes my m4 to 99 percent. No way to contact the developer on their website.
brendanmakes
25 Apr, 2025
1
I have made many great sounds with this app across multiple songs, and in every song this app crashes. Totally unstable and disappointing.
iavrou
30 Mar, 2025
1
It loads but on changing a patch it just disappears
the person that use your app
06 Mar, 2025
4
this synth is good but it keeps crashing and bugging out and when I try to freeze or render it to audio it either crash or doesn’t show the audio or it will have like a little bit of the sound and the rest is gone in a bad way. Please fix this bc I use the sample for 808 and it’s good for sound design. Please fix this
Alligatoah1.
27 Feb, 2025
1
Nice Synth, i get the good reviews, but the amount of crashes i had in one session was unbearable. Unusable as Auv3 and bad Interapp Audio Integration. So basicly just usable as Destop App. Sadly, i wish i could get my money back (or better, an update adressing these issues)

Other

Additional Information
Rating:
4.11
Voted: 207
App Store Link:
Website:
Email: -
Privacy Policy:
Categories: Music, Productivity
Size: 467MB
App Age: 2 years 9 months
Release Date: Apr 13, 2023
Last Update: Dec 08, 2023
Version: 1.04
Version history
1.04
Dec 08, 2023
- Fixed: Note panning issue which occurred at the beginning of the note
1.03
Nov 28, 2023
- Fixed MIDI learn - Added new Setting to disable/enable show save preset confirm dialog

More by Arto Vaarala

Version history