Gravity Machine vs Track8
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Generative music creation
- Physics-based orb interactions
- Customizable scales and tunings
- Multiple world shapes
- AUv3 and standalone modes
- MIDI output
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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.
Track8
This app offers a focused 8-track audio and MIDI recorder for mobile devices and Mac. It provides essential recording, arranging, editing, and mixing tools without the complexity of a full DAW. Projects are compatible with dedicated hardware.
- 8 audio and 8 MIDI tracks
- Looping and punch in/out
- Markers for arrangement
- Audio and MIDI editing
- Clipboard Modifier tools
- Track and master effects
- AUv3 hosting
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Track8 is a focused 8-track recorder for iPad, iPhone and Mac: press record, play, done. It is the same software that runs on the Track8 hardware recorder, so it works as a complete recorder on its own, and it opens the hardware's projects unchanged if you own one. No timeline to arrange, no plug-in chains to manage before you can record. Eight audio tracks and eight MIDI tracks, a loop, punch in and out, markers for structure, and a mixer with track and master effects. Every control has one job and sits on the panel in front of you: tap the buttons, drag the encoders, and use the screen in the middle for editing, exactly as on the hardware. What you can do - Record audio and MIDI on eight tracks each, with loop, punch, count-in and a metronome - Arrange with markers: jump, loop, copy and move whole sections - Edit audio and MIDI on the device, with undo - Reshape recordings with the Clipboard Modifier: time, pitch, granular, spectral, filter and voice tools, for audio and for MIDI - Mix with track and master effects, sends and automation - Host AUv3 instruments and effects as outboard gear, wired like a hardware synth or pedal - Use any audio interface, including multi-channel ones, with low latency on recent iPads and iPhones - Map USB, Bluetooth and network MIDI controllers with MIDI Learn - Export mixes and stems to a folder of your choice With or without the hardware Projects are plain files that move between the app and the Track8 hardware in both directions. Record on the go, finish on the desk, or use the app as your only recorder. Track8 is not a DAW and does not try to be one. It is a recording instrument: immediate, obvious and fast, so the idea gets recorded while it is still an idea.
Screenshots
Verdict
The clearest difference is update cadence: Track8 at every 3 days against Gravity Machine's weekly. Track8 also leads on ratings volume (3 vs 1) and price ($8.99 vs $9.99). Gravity Machine's advantage is iOS requirement (15.0 vs 17.0). On rating, ads, in-app purchases and monetization model 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
Gravity Machine costs $9.99 and Track8 $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Gravity Machine against 5.0 for Track8. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
Gravity Machine ships an update weekly, Track8 every 3 days. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.
| Parameter | Gravity Machine | Track8 |
|---|---|---|
| Price | $9.99 | $8.99 — better |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Number of ratings | 1 | 3 — better |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Touchmachines | Thingstone GmbH |
Customer experience
Gravity Machine
Track8
In-app purchases
Gravity Machine
No in-app purchases
Track8
No in-app purchases









