Comparison

Fretwork vs 4Comp

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

Head to head
About

Fretwork

This music reference app generates chord shapes, scale positions, and voicings dynamically from music theory, rather than relying on pre-set databases. It supports any tuning, string count, and instrument, offering comprehensive tools for guitarists and musicians.

Highlights
  • Dynamic chord and scale generation
  • Supports any tuning and string count
  • Comprehensive chord types and scales
  • Interactive CAGED system visualization
  • Circle of Fifths with diatonic chords
  • Integrated tuner and metronome
Features
Read full description

Fretwork is a guitar reference that derives everything from music theory — so it isn't limited to the tunings and instruments someone thought to put in a table. Most chord and scale apps ship a fixed database of shapes: standard tuning, a handful of others, six strings, and that's the edge of the map. Fretwork has no database. Every chord shape, scale position, and voicing is worked out on the spot from the notes themselves. Change the tuning, add or drop a string, hand it an instrument it's never seen — and it just keeps working. What's inside: • Chords — every chord type from triads to altered 13ths, with real playable voicings ranked by how they actually sit under your hand. • Scales — major, minor, the modes, harmonic and melodic minor, jazz, altered, symmetric, and world scales, across the whole neck, with the chords and progressions inside each. • CAGED — the five shapes laid out along one neck, color-coded and connected, so you can finally see how they link end to end. • Circle of Fifths — every key, its diatonic chords, and how they pull toward home. • Tab reading — a short, interactive lesson, with every example playable. • Tuner — listens through your microphone and tunes to any tuning, including custom ones. All processing happens on your device. • Metronome — adjustable tempo, beats, subdivisions, eight click sounds, tap tempo, and volume. Any tuning. Any string count. Nothing looked up. No accounts. No ads. No tracking. Nothing you do ever leaves your device.

About

4Comp

This audio plugin offers four distinct analog-style compressor models (FET, VCA, Optical, Vari-Mu), each with its own sound and interface. It provides advanced features like stereo linking, sidechain filtering, and real-time transfer curve visualization.

Highlights
  • Four analog compressor models (FET, VCA, Optical, Vari-Mu)
  • Unique DSP engine and interface for each model
  • Live transfer curve visualization
  • Stereo link and sidechain high-pass filter
  • Dry/wet mix and auto make-up gain
  • 17 presets included
  • 0-sample latency
Features
Read full description

Four analog-style compressors in one AUv3 plugin: FET, VCA, Optical and Vari-Mu. Each is its own DSP engine with its own sound, and the whole interface — face, knobs, meters — changes to match the one you pick. New in 1.1: tap ? for a quick start and a guide to each model, and watch the live transfer curve on VCA. FET Fast gain reduction from a feedback detector, with an all-buttons mode. Hi-hats, drum buses, spiky guitars. Ice-blue face. VCA Bus glue with program-dependent AUTO release. Tames transients and spikes without grabbing. Crimson face. Optical Smooth, level-dependent release from a modelled photocell — the cell's light memory. Vocals, brass, strings. Brushed-steel face, ivory meter. Vari-Mu A ratio that rises with level, plus harmonic colour that thickens thin tracks. Mix bus and mastering. Brass face. Four separate DSP paths Each model is its own compressor engine rather than a preset over one circuit: feedback FET, two-stage VCA, photocell release, rising-ratio tube. Switch faceplates mid-session and the plugin animates to the new model's look. Complement it Stereo link (Linked or Dual Mono), sidechain high-pass, dry/wet mix, input/output and auto make-up gain, a gain-reduction meter styled for each model and 17 presets. Real-time-safe DSP, 0-sample latency by default. Works in GarageBand, AUM, Cubasis, Loopy Pro and other AUv3 hosts on iPhone and iPad.

Screenshots

Fretwork4 screens
4Comp4 screens

Verdict

The call

The clearest difference is price: Fretwork at Free against 4Comp's $4.99. 4Comp's advantage is in-app purchases (none vs 1). On rating, ratings volume, update cadence and ads 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

Fretwork is free to download; 4Comp costs $4.99 up front. Fretwork sells 1 one-off in-app purchase. 4Comp asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Fretwork against 5.0 for 4Comp. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Fretwork ships an update every 4 days, 4Comp weekly. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 6 level
Fretwork versus 4Comp: the parameters behind the verdict, then further details
ParameterFretwork4Comp
PriceFree — better$4.99
Rating5.0 (2 ratings)5.0 (2 ratings)
Number of ratings22
Update frequencyEvery 4 days — betterWeekly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhoneiPhone, iPad — better
Requires iOS16.416.0 — better
Further details — not scored
Size49 MB8 MB
Age rating4+4+
DeveloperSTEPHEN CARROLL HAGERNATHAN THOMAS MATHIS

Customer experience

Fretwork

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

4Comp

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Fretwork

One-time1
  • Fretwork Pro$5.99
None

4Comp

No in-app purchases

Questions

Is Fretwork free?
Fretwork is free to download, with in-app purchases available.
Is 4Comp free?
4Comp costs $4.99, with no in-app purchases.
Which has better reviews, Fretwork or 4Comp?
Fretwork and 4Comp are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do Fretwork or 4Comp have ads?
Neither Fretwork nor 4Comp shows ads.
Which is updated more often, Fretwork or 4Comp?
Fretwork ships an update every 4 days, and 4Comp weekly. Most recently, Fretwork was updated on October 31, 2026 and 4Comp on November 6, 2026.

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