Comparison

MIDIRack vs Wind Chimes

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

Head to head
About

MIDIRack

Design custom MIDI control surfaces with a variety of instruments and sequencers. Unlock advanced features like a visual MIDI processing graph for complex routing and generative music creation. Use it standalone, as an AUv3 plugin, or to control desktop DAWs.

Highlights
  • Customizable touch surface design
  • KB-1 keyboard suite with MPE support
  • Advanced step and matrix sequencers
  • Visual MIDI processing graph
  • Built-in instruments and samplers
  • Connects to desktop DAWs via USB or Bluetooth
Features
Read full description

MIDIRack is a MIDI toolkit for iPad. Build a custom touch surface from the KB-1 keyboard suite, an all-new sequencer suite, knobs, faders, buttons and more — then unlock a visual MIDI processing graph (one time in-app purchase) and wire it into anything, from a simple custom controller to a full-on groovebox or a self-playing generative composer. Play it on its own and send MIDI anywhere, as an AUv3 plugin in your favourite host or a standalone instrument. THE BASE APP — PERFORMANCE SURFACE Design a custom control surface on a snapping grid: • The KB-1 keyboard suite — piano, diatonic chord pads, scale-locked keyboard, MPE Seaboard ribbon, MPE Strings grid (4ths), and a 4×4 GM drum-pad grid. Each is its own routable node with latch and octave shift. Successor to the KB-1 Expressive Keyboard Suite. • A suite of sequencers — drum, melody, chord, analog and CC step grids and a Matrix note grid, with a moving playhead, swing and microtiming. Per-step velocity, probability, tie and trigger conditions; pattern chaining and 4-pad scene switching for full arrangements; a knob-per-step analog machine that re-roots live as you play. • Knobs, faders, XY pads, buttons and live visualizers — bind to raw MIDI CC or graph parameters. On its own: a rich custom control surface builder — send MIDI and CC to any synth, app or hardware, no graph required. WITH YOUR DESKTOP DAW Expressive MPE hardware costs hundreds. MIDIRack turns the iPad you already own into a controller for Logic, Live, Bitwig, Cubase or any desktop DAW: • Two MPE surfaces — the Seaboard ribbon and the Strings grid send per-note pitch bend, slide and pressure to any MPE-capable instrument on your desk. • A controller that changes per track — MPE ribbon for the lead, drum pads for the beat, chord pads for the progression, faders mapped to CC for a mix move. Rearrange in seconds; save a surface per project. • Sequence it too — clock the step lanes to your DAW and drive its tracks. • Easy to connect — one USB cable to a Mac via IDAM (Inter-Device Audio and MIDI), or wirelessly over Bluetooth MIDI. No driver, no helper app. UNLOCK — MIDI GRAPH (in-app purchase) Wire MIDI In → processors → MIDI Out on a visual canvas: • 60+ node kinds — arpeggiators, scale/key quantizers, transposers, chords, echoes, swing, humanize, euclidean rhythms, random/generative melodies, LFOs, CC tools, an analog knob-per-step sequencer, a Matrix sequencer and a Counter. • Built-in instruments — Synth, Drums, a Sampler and a loop Slicer make sound right in the graph; no external synth required. • Emergence generators — Conway's Game of Life, Turing machine, Wolfram rules, Markov, bouncing balls, Lorenz attractor — for evolving, living patterns. • Presets — factory patches grouped by category (control surfaces, generators, keyboards, utilities): Amen Engine, Starfield, Conway Choir, Turing Bass, Cellular Drums… Save your own. ROUTING & MPE • MIDI Out exposes all 16 channels plus an MPE connector — multitimbral, multi-instrument setups. The built-in synth responds to MPE. • Every keyboard is its own node — process and route each one independently. PLAYS OUT OF THE BOX • Built-in polyphonic synth, drum kit, sampler & slicer or send MIDI to your gear via CoreMIDI and an always-on virtual port.

About

Wind Chimes

This app generates MIDI notes based on a physics simulation of colliding wind chimes. Customize chime properties, scales, and timing for unique generative music. It runs as an AUv3 MIDI generator in compatible hosts or standalone with a built-in sampler.

Highlights
  • Physics-based wind chime simulation
  • Generative MIDI note output
  • Customizable chime properties
  • AUv3 MIDI generator support
  • Standalone sampler included
  • Visual themes and timing options
Features
Read full description

Wind Chimes is a generative MIDI instrument built around a physically simulated row of wind chimes. A simulated wind field sways the chimes, and when two collide, the struck one fires a MIDI note. Play it by hand, or let the wind play on its own. REAL WIND, REAL COLLISIONS • Up to 16 chimes hang in a graduated row • Chimes ring by knocking into each other, not a clapper • Tap, hold, or drag any chime to play it by hand • Gusts sweep across the row instead of hitting all at once CUSTOMIZE EVERY CHIME • Choose anywhere from 2 to 16 chimes • Spread the row from tightly packed to wide open • Length and Weight shape each chime's swing and reach • Go full screen for a bigger, more zen performance A GENERATIVE MIDI PLAYGROUND • Every chime's note comes from the current key and scale • Turn any chime's note off, or reassign it freely • Every chime's real swing angle can drive generative CC modulation • Up to 16 chimes across up to 16 channels, endless generative variety MAKE IT YOURS • Pick from a set of beautifully designed visual themes • Switch between Free timing and a quantized grid • New Wind reseeds the sequence, keeping every setting the same • Randomize rolls a brand-new layout, tuning, and wind in one tap BUILT FOR AUV3 HOSTS • Runs as a full AUv3 MIDI Generator in any compatible host • Automate every wind and tuning parameter from the host • MIDI timing is sample-accurate, synced to the host's own tempo • Presets sync over iCloud across devices, the app, and AUv3 Play standalone with a built-in sampler for instant sound, or load Wind Chimes as a silent-audio AUv3 MIDI Generator and route it into any instrument you like.

Screenshots

MIDIRack4 screens
Wind Chimes4 screens

Verdict

The call

The clearest difference is price: Wind Chimes at $4.99 against MIDIRack's $14.99. Wind Chimes also leads on in-app purchases (none vs 1) and review sentiment (100% vs 67%). MIDIRack's advantage is ratings volume (8 vs 1). On update cadence, ads 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

MIDIRack costs $14.99 and Wind Chimes $4.99 up front. MIDIRack sells 1 one-off in-app purchase. Wind Chimes asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Wind Chimes holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: MIDIRack has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of MIDIRack's written reviews are positive against 100% of Wind Chimes's.

UpkeepUpdate frequency

MIDIRack ships an update every 4 days, Wind Chimes every 3 days. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

Scorecard7 real differences · 3 level
MIDIRack versus Wind Chimes: the parameters behind the verdict, then further details
ParameterMIDIRackWind Chimes
Price$14.99$4.99 — better
Rating4.8 (8 ratings)5.0 (1 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings8 — better1
Update frequencyEvery 4 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size28 MB14 MB
Age rating4+4+
DeveloperKai ArasCem Olcay

Customer experience

MIDIRack

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Wind Chimes

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

MIDIRack

One-time1
  • Graph Editor Unlock$7.99
None

Wind Chimes

No in-app purchases

Questions

Is MIDIRack free?
MIDIRack costs $14.99, and also offers in-app purchases.
Is Wind Chimes free?
Wind Chimes costs $4.99, with no in-app purchases.
Which has better reviews, MIDIRack or Wind Chimes?
Wind Chimes is rated higher. MIDIRack averages 4.8 out of 5 from 8 ratings, while Wind Chimes averages 5.0 from 1 ratings.
Do MIDIRack or Wind Chimes have ads?
Neither MIDIRack nor Wind Chimes shows ads.
Which is updated more often, MIDIRack or Wind Chimes?
MIDIRack ships an update every 4 days, and Wind Chimes every 3 days. Most recently, MIDIRack was updated on September 20, 2026 and Wind Chimes on September 21, 2026.

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