Comparison

ChordWeaver vs MidiDeep

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

Head to head
About

ChordWeaver

Compose music using advanced harmonic techniques with this app. Explore 3636 chord resolutions and 10 instrument ensembles. It guides you through chord progressions, allowing you to listen, transpose, and save your compositions.

Highlights
  • Modern harmony composition
  • 3636 chord resolutions
  • 10 instrument ensembles
  • Listen to chord resolutions
  • Transpose chords
  • Save as .chords or .mid
  • Mirror to main system
Features
Read full description

ChordWeaver is a music composition app based on 5-part modern harmony extensively used in symphonic scores, cinematic soundtracks, jazz chord changes and contemporary songwriting. ChordWeaver offers 3636 chord resolutions/combinations and 10 instrument or ensembles with 1920 sound files. The techniques used include altered chords (or unresolved appoggiaturas), parallel ninths, giant steps, tritone substitutions, bi-tonal ambiguities as well as traditional chord progressions. For some composers ChordWeaver will provide a fast, easy way to work with modern harmony. For other composers it offers a whole new world of possibilities and variations on traditional progressions. For the seasoned pro, it is a huge time saver. Here is how ChordWeaver efficiently guides you through the composition process. You choose your starting chord, and ChordWeaver instantly shows you and lets you listen to multiple resolutions to that chord, traditional ones and more creative, unusual ones. With each subsequent chord choice, the process is repeated. ChordWeaver seamlessly guides you to multiple possible chord options (some you will be familiar with and others you will not have considered), lets you listen to your work in progress, offers the option to transpose up or down and allows you to save your final product as a .chords file or .mid file and export or share it. You can also mirror ChordWeaver on your main system, play back the audio and improvise on your favorite instrument. Likewise, you could import the MIDI file into your sequencer and play back the harmonies using your preferred sample libraries. These chord options in ChordWeaver are the result of decades of studying the scores of the masters in various genres. They reflect the actual use of these chord progressions and resolutions by these composers and are not simply based on purely theoretical considerations.

About

MidiDeep

Features
Read full description

MidiDeep is a real-time MIDI processor. It makes no sound of its own: it reshapes what you play before your instruments ever hear it. You build a chain of effects, block by block, and you hear the result straight away. THE BLOCKS Chord — builds a diatonic chord from a single note. Degrees, inversions, sus2, sus4, sixths, sevenths, ninths, and an octave setting per block. Arpeggio — arpeggiates held notes. Six directions, divisions from whole note to 64th, gate, swing, octaves, latch, transpose. Steps — a polyphonic step sequencer, up to sixteen steps. Per step: semitone, length, ratchet, velocity, tie. Delay — synchronised MIDI repeats. Harmonize — parallel voices. Every block runs on its own internal clock or follows the MIDI clock of your sequencer. KEY AND SCALE One tonic and one scale shared by the whole chain. Fourteen scales, from major to diminished by way of the pentatonics and whole tone. Notes outside the scale are pulled to the nearest one, so you never play a wrong note. MULTIPLE TIMELINES Open as many TimeLines as you need — up to four on iPhone and iPad, up to eight windows on Mac. Each one is independent: its own effect chain, its own channel filters, its own clock, its own MIDI ports. Each TimeLine shows up as a separate port in your DAW — Ableton Live, Logic Pro or any other MIDI host. Preferences and presets stay shared across all of them. CONNECTIONS A virtual MIDI port for other apps on your device. USB MIDI interfaces. Network MIDI to your other machines. BLE MIDI. Input channel filtering, output channel remapping, and a matrix that decides, for each destination, what goes out: notes, clock, controllers. MACROS AND PRESETS Four macros, assignable to any parameter and drivable by CC from your controller. One preset per effect, plus patches that recall the entire chain. ONE PURCHASE, ALL YOUR DEVICES MidiDeep is a Universal Purchase: buy it on iPhone or iPad and it's on your Mac too; buy it on Mac and it follows you to iOS.

Screenshots

MidiDeep4 screens

Verdict

The call

The clearest difference is update cadence: MidiDeep at monthly against ChordWeaver's every 3 months. MidiDeep also leads on iOS requirement (16.6 vs 18.6). On price, ads, in-app purchases and device support 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

ChordWeaver costs $9.99 and MidiDeep $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ChordWeaver ships an update every 3 months, MidiDeep monthly. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 8 level
ChordWeaver versus MidiDeep: the parameters behind the verdict, then further details
ParameterChordWeaverMidiDeep
Price$9.99$9.99
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPadiPhone, iPad — better
Requires iOS18.616.6 — better
Further details — not scored
Size474 MB4 MB
Age rating4+4+
DeveloperJeannot WelterDIRECT GRAPHIC S.A.S.

In-app purchases

None

ChordWeaver

No in-app purchases

None

MidiDeep

No in-app purchases

Questions

Is ChordWeaver free?
ChordWeaver costs $9.99, with no in-app purchases.
Is MidiDeep free?
MidiDeep costs $9.99, with no in-app purchases.
Do ChordWeaver or MidiDeep have ads?
Neither ChordWeaver nor MidiDeep shows ads.
Which is updated more often, ChordWeaver or MidiDeep?
ChordWeaver ships an update every 3 months, and MidiDeep monthly. Most recently, ChordWeaver was updated on October 1, 2026 and MidiDeep on October 8, 2026.

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