Comparison

Gravity Machine vs Jacquardi4

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

Head to head
About

Gravity Machine

Create music by manipulating a miniature solar system. Fling orbs that bounce off walls, generating notes based on physics and chosen scales. Customize worlds, sounds, and tunings for unique generative compositions.

Highlights
  • Generative music creation
  • Physics-based orb interactions
  • Customizable scales and tunings
  • Multiple world shapes
  • AUv3 and standalone modes
  • MIDI output
Features
Read full description

A tiny solar system that plays piano. Four orbs, a gravity well, and walls that ring like bells. Fling an orb and it falls, ricochets, and plays notes. Where it hits a wall decides what it plays; the physics decide when. You don't write the music. You build a small world and curate what it sings. Gravity is a touch instrument first. Grab an orb and it follows your finger; let go and the throw becomes its velocity. Drag the gravity well and every orbit in the room bends. Set Pulse and the well breathes in time with the tempo, so chaos starts keeping a schedule. EVERYTHING LANDS IN KEY Every impact point along the boundary maps to a note of the current scale, low at one end, high at the other. Pick from 16 scales and 11 tuning systems (12-TET, just intonation, maqam, shruti and more). The scale strip along the bottom is a key-change timeline: tap a segment, change the key, and the whole world modulates on the bar. EIGHT WORLDS TO BOUNCE IN Rectangle, circle, triangle, hexagon, pentagon, octagon, diamond, star. Sharp corners ricochet hard and play jagged. Round shapes glide and play smooth. SOUND A 16-voice pluck engine through a double-bass body and reverb. Octave, key range, quantize from 1/32 to 1/2, orb-to-orb collisions on or off. Presets to start from, themes for the visuals. AUv3 AND STANDALONE Use Gravity full-screen as a standalone instrument, or load it as an AUv3 in GarageBand, AUM, Logic Pro, Cubasis, Loopy Pro and any other Audio Unit host. Each orb has its own MIDI channel, so Gravity can drive other instruments in your host. ONE PRICE No account, no ads, no in-app purchases, no data collected. Buy it once and it's yours. The same engine ships as a VST3 and AU plugin for Windows and macOS at touchmachines.com.

About

Jacquardi4

Read full description

Concept: “Jacquardi4” is an AUv3 instrument that does not make any sounds but can send out 4 analog-like “Envelope” signals via MIDI control changes (MIDI CC). That is, the app contains 4 MIDI modules of envelope generator. The user can use them for modulating any parameter of 3rd-party’s plugins that can be assigned to MIDI CC , for example, cutoff frequency. System Requirements: AUv3 host that has a flexible capability of MIDI routing (AUM, apeMatrix, LoopyPro, etc). Usage: Just assign MIDI keyboard to Jacquardi4's MIDI IN (it needs to trigger Jacquardi4) and assign Jacquardi4's MIDI OUT to 3rd party's plugins. Explanation of sliders: Channel: determines MIDI channel. Control Rate: determines the resolution of MIDI processing. Higher value, higher resolution. Active: turn on or off the module. Useful when using MIDI learn functionality of 3rd party plugin. MIDI CC: determines MIDI control number. (text-editable) Amp: determines amplitude in dB Offset: determines an initial value. Attack: attack value. Decay Time: decay time value. Decay Curve: decay curve value. Sustain: sustain value. Release: release value. Explanation of Preset File System: At first make a new bank folder, in which you can save a preset file. And push "Save As" button. Also the user can export or import preset files.

Screenshots

Gravity Machine1 screens
Jacquardi42 screens

Verdict

The call

The clearest difference is price: Jacquardi4 at $5.99 against Gravity Machine's $9.99. On update cadence, 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

Gravity Machine costs $9.99 and Jacquardi4 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

Scorecard1 real difference · 8 level
Gravity Machine versus Jacquardi4: the parameters behind the verdict, then further details
ParameterGravity MachineJacquardi4
Price$9.99$5.99 — better
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size12 MB12 MB
Age rating4+4+
DeveloperTouchmachinesSatoshi Kajii

In-app purchases

None

Gravity Machine

No in-app purchases

None

Jacquardi4

No in-app purchases

Questions

Is Gravity Machine free?
Gravity Machine costs $9.99, with no in-app purchases.
Is Jacquardi4 free?
Jacquardi4 costs $5.99, with no in-app purchases.
Do Gravity Machine or Jacquardi4 have ads?
Neither Gravity Machine nor Jacquardi4 shows ads.
Which is updated more often, Gravity Machine or Jacquardi4?
Gravity Machine ships an update weekly, and Jacquardi4 weekly. Most recently, Gravity Machine was updated on October 7, 2026 and Jacquardi4 on October 8, 2026.

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