# GridInstrument — Grid-based musical instrument

> Grid-based musical instrument app for iOS with MIDI and Launchpad support. (iPhone/iPad app by Decidedly, LLC.)

- Source: https://appshunter.io/ios/app/gridinstrument/id1296511558 (this page in markdown: same URL + `.md`)
- Developer: [Decidedly, LLC](https://appshunter.io/developer/783782943)
- Category: Music, Entertainment
- Price: $3.99
- Rating: 4.50/5 from 11 App Store ratings · 24 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 15 MB
- Languages: American English
- Released: 2017-10-16
- Data updated: 2026-09-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gridinstrument/id1296511558/reviews.md

## What is GridInstrument?

GridInstrument lets you play your iOS device like a musical instrument. Instead of a piano keyboard, notes are arranged on a grid. It also lets you hook up your Launchpad device (using the Apple Camera Connection Kit) and play that as well!

Features:

- Launchpad integration (connect your Launchpad Mini in low-power mode without a hub or any other Launchpad with a powered hub)
- Change octaves
- Change keys
- Change from over 20 musical modes ("Major, Minor, Dorian, Mixolydian, etc.")
- Choose between three grid layouts ("Diatonic", "Chromatic/4ths String Layout", "Drum rack"), as well as row note offset/overlap setting
- Core MIDI out so that you use GridInstrument to control your other instruments
- Audiobus 3 MIDI support
- MIDI note input so that you can see notes triggered by other devices on your grid

Want to see some other feature implemented? Contact us at the Decidedly website.

## Key features

- Grid-based note arrangement
- Launchpad integration
- Over 20 musical modes
- Multiple grid layouts
- Core MIDI out
- Audiobus 3 MIDI support

## Recent user reviews (10 of 24)

All indexed reviews: https://appshunter.io/ios/app/gridinstrument/id1296511558/reviews.md

### 4/5 — Pretty good.

*2024-03-13*

Please add buttons to quick switch midi channel.

### 5/5 — Great! Missing option of pitch and mod wheels. One issue with Audiobus3

*2023-02-23*

It’s good. 5 stars because I liked it and it saved me of something the push 2 couldn’t, but!... Could be better! Still! Something weird happens when triggered by Audiobus3: Rightmost column keys can only be played in the left half of them. No matter if you spin the iPad around. And the leftmost column keys miss the light at the very left but still sound. These last details don’t happen without Audiobus3. I would add the option to show the modulation and pitch wheels, or more.

### 5/5 — Great tool! DAW input & teaching/exploring/learning.

*2022-10-10*

This is a great tool that serve so many of my needs at the same time! On an iPad 12.9 inch in landscape mode you get a grid of pads 13 wide and 8 high. You can also go portrait mode 10 wide, 12 high. From left to right you can choose to have the diatonic notes of a scale, key-center highlighted, or you can go chromatic and have the key-center and diatonic notes highlighted while the notes out-of-scale are grayed out but still playable. And with 13 pads wide, you get all 12 tones + the key-center on top in one row - try to buy a physical launchpad that big! Independent from that you can select the interval step in which the notes from bottom to top are stacked. And you can play 10 notes at the same time!

You can use this as a input method for your DAW, or for teaching/exploring/learning! Set up octaves from bottom to top and check out the overtone-series. Stack thirds or forths to construct chords easily - more time hearing/exploring/experience harmonic ideas in the first place! How should you learn and recognize the modes on your instrument if you have no idea of their sounds beforehand? Highlight the notes of a mode on a chromatic layout and create melodies right away. Damn piano keyboard only allows to experience C Major easily (exaggerated). In this app you can experience all scales as easy as C Major on a piano.

Some feature request for educational purposes:

interval-stack bottom to top starts with minor 2nd. Please add option unison (+0).
options to go without highlights at all. So key = „none“ and scale = „none“.

### 5/5 — 最高。買ってよかった。

*2022-03-16, version 1.1*

ノートモードとトリガーモードを切り替えられると、更に売れると思う。

### 5/5 — Ableton Push 2

*2022-02-12, version 1.1*

Add Ableton Push 2 support please

### 4/5 — Like Launchpad Pro Scale mode

*2022-02-07*

Great MIDI controller like Launchpad Pro’s scale mode.  It would be nice if this was an 8 X 8 grid though or something we can customize.

### 1/5 — Not working with Launchpad Pro

*2021-06-24*

I was interested in getting this app after watching some videos. Unfortunately, after defining device and correct model I’m able to see the grid on Launchpad Pro, but no sound after pressing pads. I’d welcome some support. Thank you

### 4/5 — Nice for iPad

*2021-03-27*

I like the app on the iPad but on the iPhone I am missing a horizontal screen (=feature request ^^).

### 5/5 — もっと早く知りたかった

*2020-07-26, version 1.1*

これがあるとlaunch padがノートモードで使えるようになります。
もちろんmk3は元々出来ますけど、mk2以前のものでもできます。しかもmk2以前のものはUD BT01にも対応してるからBluetoothで使うことができます。

### 3/5 — Beautiful lights come on

*2020-05-25, version 1.1*

Using an iPad Pro and launchpad pro . Liked the idea of this app unfortunately all the notes lock when played on launchpad and won’t connect to other apps using AUM

## Frequently asked questions about GridInstrument

### What is GridInstrument?

GridInstrument is a mobile application that turns your iOS device into a musical instrument. Instead of a traditional keyboard, it arranges notes on a grid, offering a unique way to play and create music.

### What are the key features of GridInstrument?

Key features include Launchpad integration, the ability to change octaves and keys, access to over 20 musical modes, three different grid layouts (Diatonic, Chromatic/4ths String Layout, Drum rack), Core MIDI out for controlling other instruments, and Audiobus 3 MIDI support.

### How much does GridInstrument cost?

Based on the provided information, GridInstrument is a paid application. There are no mentions of in-app purchases or advertisements, suggesting a one-time purchase model.

### What devices is GridInstrument compatible with?

GridInstrument is designed for iOS devices. It can also connect to Launchpad devices using the Apple Camera Connection Kit. Specific Launchpad models may require a powered hub.

### What are some common use cases for GridInstrument?

Users can play melodies and chords using the grid interface, experiment with different musical modes and scales, control external MIDI synthesizers and instruments, and integrate it into their existing music production workflows with Audiobus.

## Version history (last 5 releases)

### 1.1 — 2020-04-14

It is now possible to select octave button layout (paired mode only).

### 1.0.1 — 2020-01-26

- Added support for Launchpad Mini MK3

### 1.0.0 — 2020-01-21

- Added support for Launchpad X and Launchpad Mini MK3

### 0.9.4 — 2018-09-03

- Fixed a small bug that was causing the app to work unreliably with Launchpad Pro controllers.

### 0.9.3 — 2018-08-28

Small update: 

GridInstrument now accept MIDI note input! MIDI input causes grid squares (and Launchpad lights) to light up. This is useful if, for example, you use GridInstrument in conjunction with an arpeggiator (such a Ruismaker's Rozeta Arpeggio) and want to see what notes the arpeggiator is triggering.

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## More apps by Decidedly, LLC

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- [Decent Sampler](https://appshunter.io/ios/app/decent-sampler/id1530441977)

All apps by Decidedly, LLC: https://appshunter.io/developer/783782943

## Related topics

[grid music midi player](https://appshunter.io/ios/topics/grid-music-midi-player)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*