Comparison

Fuzz Droid (Legacy) vs MusicKeyRoll

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fuzz Droid (Legacy)

This audio effect plugin offers two distinct distortion circuits for aggressive or smoother sounds. It includes digital extras like smoothing, bias control, and tone-shaping filters. Morph settings allow for dynamic transitions between two sound configurations.

Highlights
  • Two asymmetric distortion circuits
  • Custom smoothing function
  • Adjustable bias control
  • Flexible tone-shaping filters
  • Morph settings for transitions
  • AUv3 effect plugin
  • User presets synced across devices
Read full description

***This is now a legacy product. It will receive only maintenance updates. If you purchased Fuzz Droid using version 1.5 or earlier, you are eligible for a free upgrade to Fuzz Droid v2. You can claim your upgrade code inside the plug-in's settings menu.*** ***Please note purchases made as of version 1.6 are NOT eligible for a free upgrade to a v2 license.*** Fuzz Droid is a distortion effect based on the CP3 modular mixer. Its sharp, asymmetric discontinuity makes for a unique & aggressive sound! If you find the main circuit a little too rude, we also included a smoother curve from the same module. Finally, we took the opportunity to add some digital extras: a custom smoothing function, adjustable bias, and flexible tone-shaping filters to fine tune your sound. The result is the rudest effect we've created so far! Details: - Two asymmetric distortion circuits from OG CP3 module - CP3+: A sharp discontinuity generates massive harmonics - CP3-: A smoother curve for a less aggressive sound - Digital extras - Custom smoothing function for taming harsh artifacts - Bias control adjusts how you hit the asymmetries - Flexible high- and low-pass tone-shaping filters - Morph Settings lets you transition the plug-in between two settings. Useful for performance, modulation, automation, and more! Features: - Two-week free trial included, one-time purchase for full unlock - AUv3 effect plug-in runs in a compatible DAW - Standalone links to user manual and video tutorials - Universal purchase on Apple platforms - User presets synced across your devices - Clickless global bypass - Internal undo/redo - A/B settings comparison - High quality mode enables oversampling (plus advanced anti-aliasing techniques) - Output trim with perceived loudness matching - Global dry/wet - All parameters automatable - Optional auto gain - Mac version includes CLAP and VST3 plug-in formats Check out our YouTube: https://www.youtube.com/@sketchaudio Read the manuals: https://sketchaudio.com/manuals/ Preview audio credit: Freesound user wjoojoo

About

MusicKeyRoll

Features
Read full description

Elevate your piano sight-reading and musical skills with this versatile practice app, compatible with both MIDI keyboards and an intuitive on-screen keyboard. Explore a wide range of features designed to help you progress step-by-step: • Key Signature Selection: Easily choose your key signature using an interactive circle of fifths. • Sight-Reading Exercises: Improve note recognition with treble, bass, or grand staff reading drills. • Scale Drills & Fingering Guidance: Master scales and appropriate finger techniques. • Chords & Progressions: Strengthen your harmonic foundation through focused chord training and chord progression exercises. • Hanon Exercises: Enhance agility and technique with classic Hanon drills. • Simple Repertoire: Practice short, beginner-friendly pieces to apply your new skills. • Authentic Sounds: Experience realistic audio options, including General MIDI instruments or a rich Steinway Grand Piano sound. Develop your sight reading skills, speed, and confidence—one note at a time.

Screenshots

Fuzz Droid (Legacy)3 screens
MusicKeyRoll4 screens

Verdict

The call

The clearest difference is in-app purchases: MusicKeyRoll at none against Fuzz Droid (Legacy)'s 2. MusicKeyRoll also leads on update cadence (weekly vs every 8 months). On price, ads, device support and iOS requirement 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

Both are free to download. Fuzz Droid (Legacy) sells 2 one-off in-app purchases. MusicKeyRoll asks for nothing beyond the download.

UpkeepUpdate frequency

Fuzz Droid (Legacy) ships an update every 8 months, MusicKeyRoll weekly. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 8 level
Fuzz Droid (Legacy) versus MusicKeyRoll: the parameters behind the verdict, then further details
ParameterFuzz Droid (Legacy)MusicKeyRoll
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 8 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, MaciPhone, iPad, iPod, Mac
Requires iOS15.0 — better15.6
Further details — not scored
Size6 MB182 MB
Age rating4+4+
DeveloperSketch Audio, LLCMozusystems, LLC

In-app purchases

2 purchases

Fuzz Droid (Legacy)

One-time2
  • Two-Week TrialFree
  • Full Unlock$9.99
None

MusicKeyRoll

No in-app purchases

Questions

Is Fuzz Droid (Legacy) free?
Fuzz Droid (Legacy) is free to download, with in-app purchases available.
Is MusicKeyRoll free?
MusicKeyRoll is free to download, with no in-app purchases.
Do Fuzz Droid (Legacy) or MusicKeyRoll have ads?
Neither Fuzz Droid (Legacy) nor MusicKeyRoll shows ads.
Which is updated more often, Fuzz Droid (Legacy) or MusicKeyRoll?
Fuzz Droid (Legacy) ships an update every 8 months, and MusicKeyRoll weekly. Most recently, Fuzz Droid (Legacy) was updated on November 4, 2026 and MusicKeyRoll on November 8, 2026.

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