Musix Pro vs GridStep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Musix Pro
This app offers an intuitive musical instrument and MIDI controller with an isomorphic layout that arranges notes based on harmonic relationships. It allows users of all skill levels to explore music theory, create melodies easily, and connect with DAWs and synthesizers.
- Isomorphic note arrangement
- Customizable layouts
- MIDI and OSC support
- Audiobus integration
- Built-in instruments
- Note labeling and coloring
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Are you a Pro Musician who wants the best MIDI playing surface or a music newcomer who wants to play melodies more intuitively? Musix Pro packs more notes on the screen than any other app and does so with customizable layouts that bake music theory in. Step up your musical abilities by downloading now. What do people say about Musix Pro? "Anyone who loves music, regardless of skill level, owes it to themselves to experience Musix. Simply exploring the app will open musical doors you never knew existed." - 148apps.com "Musix is a Killer App!" - apps4idevices.com See Musix Pro in action: http://www.youtube.com/shiverware Traditional musical instruments are difficult to learn because notes are arranged based on physical constraints. Musix Pro arranges notes based on their harmonic and musical relationships instead, allowing shapes and patterns to emerge that unlock the mathematical beauty of music. What is Musix Pro: - A professional musical instrument and midi controller - Learn one pattern and instantly play in any key - Explore the harmonic relationships between notes - Play music easily without sacrificing virtousity - An isomorphic layout creator and experimentation app - A melody exploration device Features: - Core / Virtual / Bluetooth Midi, OSC - Supports all MIDI / Audiobus DAWs - Touch Velocity Dynamics - 8 Built-in instruments - AudioBus Support (MIDI sender, Audio sender, State Saving) - Hexagonal and Rectangular layouts - Multiple built-in note arrangements - Custom layout generation and saving - Colourize different notes based on key, scale, and mode - Label notes based on Solfege, or Note name - Multiple note sizes - Multiple color patterns - Note Overlap (play 3-note chords with one finger) - Full iPhone Support Unlike other music apps, Musix Pro provides a wide range of octaves, scales, keys, chords and modes, without limiting your creativity. With multiple built-in instruments and support for OSC and Core/Virtual Midi, most existing synthesizers work beautifully with Musix Pro as a controller. ADDITIONAL INFORMATION: Musix Pro is key agnostic, which means is that once you have learned a musical pattern (like a chord or a scale) that pattern is the same for all keys, even the dreaded A-Flat! Sharps and flats appear in the right place automatically, through the mathematical magic of isomorphism. You can learn to play melodies on a traditional keyboard by playing them on Musix Pro and watching where the sharps and flats go. Songwriters benefit by discovering new melodies and musical relationships. Novices find it easy to learn to play. Experienced musicians are rewarded with an intuitive interface. Keys can be resized to fit your style - start with "epic"-sized keys, and as you get better you can shrink the keys fill the screen with notes. Isomorphic keyboards are found on traditional and new instruments, from concertinas, accordions, and "jammers" to Janko keyboards, harmonic-table devices and more. Musix Pro is the only way to access all isomorphic note arrangements in one powerful customizable application. Musix Pro comes with a set of built-in layouts, each with its own pros and cons. The harmonic table layout allows you to play any major chord by touching three hexes with one finger. Wicki-Hayden makes modulating between pentatonic scales a breeze. Try them all and find one that works for you. Musix Pro allows you to change the colour of the notes in your layout. You can colour the notes white and black like a piano; you can colour the notes of any scale or mode (like D-flat mixolidian) and you can colour notes based on tone centre.
GridStep
A professional MIDI step sequencer offering a focused grid-based workflow for clear, controlled, and predictable music creation. It functions as a standalone app and an AUv3 plugin, ideal for both live performance and composition.
- Grid-based MIDI step sequencing
- Explicit edit modes for notes, velocity, slides, and mutes
- Trigger-based step advance
- Controlled pattern generation
- AUv3 MIDI effect plugin
- Standalone app functionality
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GridStep is a professional MIDI step sequencer designed for clarity, control, and predictable results. It works as a standalone app as well as an AUv3 plugin. GridStep provides a focused grid-based workflow with explicit edit modes, per-step inspection, and one-shot generation tools. Every interaction is intentional, allowing patterns to evolve without ambiguity. Core Features Explicit Edit Modes - Dedicated modes for Notes, Velocity, Slides, and Mutes - Clear, consistent interactions across the grid Precision Grid Editing - Step-based grid with visible playhead and pattern length - Per-step inspector for detailed control - Efficient editing without leaving the main view Trigger-Based Step Advance - Advance the sequence using incoming MIDI triggers instead of the host clock - Enables irregular rhythms, external control, and non-linear playback - Fully compatible with standard clocked playback Controlled Generation - Pattern generation for notes, velocity, slides, and mutes - Apply generation globally, per lane, or per selection - Designed to support musical intent Performance-Focused Design - Deterministic, repeatable sequencing behaviour - Stage-safe interface optimized for quick adjustments - Predictable timing within AUv3 hosts AUv3 MIDI Effect - Works in AUv3 hosts such as AUM, Drambo, Logic, and Cubasis - MIDI-only design compatible with any synth or sampler Built for both live performance and composition, GridStep emphasizes stability, readability, and repeatable behaviour.
Screenshots
Verdict
The clearest difference is rating: GridStep at 5.0 against Musix Pro's 4.6. GridStep also leads on price ($3.99 vs $9.99) and update cadence (every 2 weeks vs every 6 weeks). Musix Pro's advantage is ratings volume (136 vs 3) and chart position (#185 vs unranked). On ads, in-app purchases, monetization model 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
Musix Pro costs $9.99 and GridStep $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
GridStep holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Musix Pro has 136 ratings behind it against 3, so its average is the more settled of the two.
Musix Pro ships an update every 6 weeks, GridStep every 2 weeks. The most recent releases landed on November 10, 2026 and November 5, 2026 respectively.
| Parameter | Musix Pro | GridStep |
|---|---|---|
| Price | $9.99 | $3.99 — better |
| Rating | 4.6 (136 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 77.9% of reviews | — |
| Number of ratings | 136 — better | 3 |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #185 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.2 — better | 17.6 |
| Further details — not scored | ||
| Size | 16 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Shiverware | Joe Topjian |
Customer experience
Musix Pro
GridStep
In-app purchases
Musix Pro
No in-app purchases
GridStep
No in-app purchases









