Comparison

Callback Freeverb vs ChordFlowWiz

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

Head to head
About

Callback Freeverb

This app offers a classic algorithmic reverb effect based on the Freeverb algorithm. It adds depth, space, and atmosphere to audio sources, creating lush, spacious ambience. Designed for mono use, it provides a smooth, musical reverb tail suitable for vocals and synthesizers.

Highlights
  • Classic Freeverb algorithm
  • Schroeder/Moorer reverb topology
  • Comb and allpass filters
  • Mono operation
  • Adds depth and space to audio
  • Smooth, musical reverb tail
Features
Read full description

A classic algorithmic reverb effect based on the Freeverb algorithm by Jezar at Dreampoint. A Freeverb-style Schroeder/Moorer reverb based on the classic 8-comb + 4-allpass topology, with simplified controls and no stereo spread. This reverb creates lush, spacious ambience through a network of comb and allpass filters. Freeverb is widely used in electronic music production, ambient music, and sound design to add depth, space, and atmosphere to audio sources. The algorithm provides a smooth, musical reverb tail that works well on everything from vocals to synthesizers. This reverb only functions in mono and provides no stereo imaging, and the user can expect the same behavior as a classic Freeverb implementation otherwise.

About

ChordFlowWiz

Explore and practice guitar chords with an extensive library featuring clear finger diagrams. Discover chord relationships, substitutions, and build custom sets. Offers a metronome and practice modes for musicians of all levels.

Highlights
  • 100+ guitar chords with finger diagrams
  • Search and filter by root note or quality
  • Capo and Chords in Key tools
  • Chord Progression Player with metronome
  • Custom Chord Builder
  • Scale Viewer
  • PDF Export
Features
Read full description

ChordFlowWiz is the guitar chord library that gets out of your way. Find any chord in seconds, see exactly where your fingers go, hear how it sounds, and learn which chords belong together. FIND ANY CHORD INSTANTLY • 160+ chord diagrams across all 12 roots and 14 chord types: major, minor, 7th, major 7th, minor 7th, sus2, sus4, diminished, augmented, add9, 6th, minor 6th, 7sus4 and minor 7flat5 • Search by name, with sharps or flats: "Bb" and "A#" both work • Filter by root note and chord type, and jump back to recently viewed chords • Save favourites for one-tap access SEE IT. HEAR IT. • Clear diagrams with finger numbers, open and muted strings, barres and fret position • Tap to hear any chord strummed • Left-handed mode flips every diagram CAPO MADE EASY Set a capo anywhere from fret 1 to 11 and see what every chord actually sounds like. UNDERSTAND THE MUSIC • Key Finder shows every chord in any major or minor key, with Roman numerals • Each chord shows its notes, the chords in its key and related chords, plus a transpose tool GO FURTHER WITH PRO One-time purchase. No subscription. • Chord sets: build setlists for your songs and practice routines • Progression player: loop a set from 40 to 200 BPM with a practice countdown • Custom chord builder: tap the fretboard to create and save your own voicings • Strum and arpeggio playback • Alternate voicings for selected chords • Scale viewer: major, minor, pentatonic and blues positions on the fretboard • Smart chord substitutions: relative minors, tritone subs and passing chords, each explained in plain English • Metronome with tap tempo, 2/4, 3/4, 4/4 and 6/4 time signatures, and an audible click • PDF chord sheet export to print or share BUILT FOR YOUR DEVICE Designed for iPhone, iPad and iPhone Duo, with Dark Mode, Dynamic Type and VoiceOver support. PRIVATE BY DESIGN No account, no ads and no tracking. ChordFlowWiz doesn't collect your data.

Screenshots

Callback Freeverb4 screens
ChordFlowWiz4 screens

Verdict

The call

The clearest difference is in-app purchases: Callback Freeverb at none against ChordFlowWiz's 1. Callback Freeverb also leads on iOS requirement (17.0 vs 26.0). On price, rating, ratings volume 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

Both are free to download. ChordFlowWiz sells 1 one-off in-app purchase. Callback Freeverb 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 Callback Freeverb against 5.0 for ChordFlowWiz. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Scorecard3 real differences · 6 level
Callback Freeverb versus ChordFlowWiz: the parameters behind the verdict, then further details
ParameterCallback FreeverbChordFlowWiz
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequency—Every 3 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better26.0
Further details — not scored
Size7 MB5 MB
Age rating4+4+
DeveloperCallback Audio, LLCJames Roche

Customer experience

Callback Freeverb

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

ChordFlowWiz

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Callback Freeverb

No in-app purchases

1 purchases

ChordFlowWiz

One-time1
  • ChordFlowWiz Pro$2.99

Questions

Is Callback Freeverb free?
Callback Freeverb is free to download, with no in-app purchases.
Is ChordFlowWiz free?
ChordFlowWiz is free to download, with in-app purchases available.
Which has better reviews, Callback Freeverb or ChordFlowWiz?
Callback Freeverb and ChordFlowWiz are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Callback Freeverb or ChordFlowWiz have ads?
Neither Callback Freeverb nor ChordFlowWiz shows ads.

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