# ButterSynth vs Riffler

The clearest difference is rating: Riffler at 4.7 against ButterSynth's 4.0. Riffler also leads on update cadence (every 10 days vs every 2 months) and review sentiment (86% vs 59%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

ButterSynth costs $19.99 and Riffler $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Riffler holds the better App Store score, 4.7 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 86% of Riffler's.

ButterSynth ships an update every 2 months, Riffler every 10 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ButterSynth | Riffler |
| --- | --- | --- |
| Price | $19.99 | **$14.99** |
| Rating | [4.0 (63 ratings)](https://appshunter.io/ios/app/buttersynth/id1497419006/reviews) | **[4.7 (125 ratings)](https://appshunter.io/ios/app/riffler/id1556225557/reviews)** |
| Number of ratings | 63 | **125** |
| Positive reviews | 59.2% of reviews | **86.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Paid | Paid |
| Size | 468 MB | 504 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arto Vaarala](https://appshunter.io/developer/890886114) | [Jonathan Bell](https://appshunter.io/developer/1061939293) |

## 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


### Riffler

[App page](https://appshunter.io/ios/app/riffler/id1556225557)

Instantly generate unlimited, copyright-free guitar riffs with customizable settings. Export as MIDI or audio, and use as a standalone app or AUv3 plugin. Perfect for guitarists, composers, and producers seeking creative inspiration.

**Highlights:** Unlimited copyright-free riff generation, Preset musical styles, Customizable settings (tempo, scale, tuning, etc.), Guitar tablature display, MIDI and audio export (.wav, .mid), AUv3 plugin compatibility, Realistic guitar tones

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Awesome concept and app
- 👍 Generates great hard rock and heavy metal riffs
- 👍 Integrates well with common hosts
- 👍 Good onboard sounds
- 👍 Excellent for inspiration and creating original music

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🐛 Compatibility problems with Logic Pro
- 🐛 MIDI export issues (max velocity, monophonic)
- 🐛 Inability to disable internal sequencer for MIDI input
- 🔍 Small screen size makes it difficult to use on iPhone

**Reported bugs**

- Crashes and freezes, especially on older devices
- Issues with exporting audio and MIDI
- Compatibility problems with certain DAWs and software
- Inconsistent behavior when loading saved riffs

**Requested features**

- Add MIDI input functionality
- Implement song mode to chain multiple riffs
- Add more scale and chord options
- Implement advanced guitar techniques (hammer-ons, slides, harmonics, etc.)
- Add drum sequencer or preset drum loops


## Frequently asked questions

### Is ButterSynth free?

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

### Is Riffler free?

Riffler costs $14.99, with no in-app purchases.

### Which has better reviews, ButterSynth or Riffler?

Riffler is rated higher. ButterSynth averages 4.0 out of 5 from 63 ratings, while Riffler averages 4.7 from 125 ratings.

### Do ButterSynth or Riffler have ads?

Neither ButterSynth nor Riffler shows ads.

### Which is updated more often, ButterSynth or Riffler?

ButterSynth ships an update every 2 months, and Riffler every 10 days. Most recently, ButterSynth was updated on October 29, 2026 and Riffler on October 30, 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.*