# ButterSynth vs FabFilter Twin 3

The clearest difference is rating: FabFilter Twin 3 at 4.6 against ButterSynth's 4.0. FabFilter Twin 3 also leads on review sentiment (86% vs 59%). ButterSynth's advantage is update cadence (every 2 months vs every 19 months) and price ($19.99 vs $24.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

ButterSynth costs $19.99 and FabFilter Twin 3 $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FabFilter Twin 3 holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 63 and 42 respectively. Written reviews point the same way: 59% of ButterSynth's written reviews are positive against 86% of FabFilter Twin 3's.

ButterSynth ships an update every 2 months, FabFilter Twin 3 every 19 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | ButterSynth | FabFilter Twin 3 |
| --- | --- | --- |
| Price | **$19.99** | $24.99 |
| Rating | [4.0 (63 ratings)](https://appshunter.io/ios/app/buttersynth/id1497419006/reviews) | **[4.6 (42 ratings)](https://appshunter.io/ios/app/fabfilter-twin-3/id1671810470/reviews)** |
| Number of ratings | **63** | 42 |
| Positive reviews | 59.2% of reviews | **86.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 19 months |
| Monetization | Paid | Paid |
| Size | 468 MB | 11 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arto Vaarala](https://appshunter.io/developer/890886114) | [FabFilter](https://appshunter.io/developer/421796789) |

## What reviewers say

### ButterSynth

[App page](https://appshunter.io/ios/app/buttersynth/id1497419006)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

- 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


### FabFilter Twin 3

[App page](https://appshunter.io/ios/app/fabfilter-twin-3/id1671810470)

This powerful virtual analog synthesizer offers a vast array of sound-shaping tools, including multiple oscillators, filters, and a comprehensive modulation system. Create a wide range of synth sounds with an intuitive interface and a rich factory preset library.

**Highlights:** Four flexible oscillators, Four vintage-style filters, Extensive modulation system, All-new FX section, Arpeggiator with groove controls, Full-featured preset browser, Analog-modelled drift

**In-app purchases:** none


## Frequently asked questions

### Is ButterSynth free?

ButterSynth costs $19.99, with no in-app purchases.

### Is FabFilter Twin 3 free?

FabFilter Twin 3 costs $24.99, with no in-app purchases.

### Which has better reviews, ButterSynth or FabFilter Twin 3?

FabFilter Twin 3 is rated higher. ButterSynth averages 4.0 out of 5 from 63 ratings, while FabFilter Twin 3 averages 4.6 from 42 ratings.

### Do ButterSynth or FabFilter Twin 3 have ads?

Neither ButterSynth nor FabFilter Twin 3 shows ads.

### Which is updated more often, ButterSynth or FabFilter Twin 3?

ButterSynth ships an update every 2 months, and FabFilter Twin 3 every 19 months. Most recently, ButterSynth was updated on October 27, 2026 and FabFilter Twin 3 on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*