# Grasswhistle — Sequenced arpeggiator

> Sequenced arpeggiator for creating melodies from chord progressions. (iPhone/iPad app by Aqeel Aadam.)

- Source: https://appshunter.io/ios/app/grasswhistle/id6821031151 (this page in markdown: same URL + `.md`)
- Developer: [Aqeel Aadam](https://appshunter.io/developer/1724235864)
- Category: Music
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 18 MB
- Released: 2026-11-06
- Data updated: 2026-11-09
- Monetization: free

## What is Grasswhistle?

Customizable arpeggios, right at your fingertips. 

Grasswhistle is a free arpeggiator from Aqeel Aadam Sound. Build a sequence of notes to arpeggiate your chord progressions in brand new ways. Grasswhistle adapts to whatever chord you throw at it, creating a seamless and recognizable melody from any chord progression. Find instant inspiration with robust randomization features, performance options, and 50+ factory presets.

Grasswhistle can be loaded as an instrument or as a MIDI effect. As an instrument, it has a built-in synth voice for quick and easy playback. As a MIDI effect, you can sequence your favorite devices with endlessly inspiring arpeggios.

Grasswhistle is completely free, though you can choose to send a tip inside of the standalone app. This is completely optional, but always appreciated! This donation does not unlock any additional functionality.

Also available for macOS and Windows in VST3 / AU / AAX formats from Aqeel Aadam Sound.

## Key features

- Customizable arpeggios
- Chord progression sequencing
- Randomization features
- Performance options
- 50+ factory presets
- Standalone instrument
- MIDI effect

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Small coffee | $3.00 | one-time |
| Large coffee | $5.00 | one-time |


## Is Grasswhistle safe?

Not enough ratings yet to assess Grasswhistle.

## Is Grasswhistle legit?

Grasswhistle appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Grasswhistle is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about Grasswhistle

### What is Grasswhistle?

Grasswhistle is a free arpeggiator app that allows you to build note sequences to arpeggiate your chord progressions. It can be used as a standalone instrument with a built-in synth or as a MIDI effect to sequence other devices.

### Is Grasswhistle free to use?

Yes, Grasswhistle is completely free to download and use. While there is an option to send an optional tip to the developer within the standalone app, this does not unlock any additional features.

### What devices does Grasswhistle support?

Grasswhistle is available for iPhone, iPad, and iPod touch. It is also available for macOS and Windows in VST3, AU, and AAX formats.

### How often is Grasswhistle updated?

The latest version of Grasswhistle is 1.0.1, which was last updated on November 8, 2026. This indicates recent development activity.

### What is the age rating for Grasswhistle?

Grasswhistle has an age rating of 4+, making it suitable for a wide range of users.

### Can Grasswhistle help with musical inspiration?

Yes, Grasswhistle offers robust randomization features that can provide instant inspiration for creating new melodies and exploring different chord progressions.

### Does Grasswhistle have ads?

No, Grasswhistle does not contain advertisements. The app is free to use without any ad interruptions.

### What are the benefits of using Grasswhistle as a MIDI effect?

When used as a MIDI effect, Grasswhistle allows you to sequence your favorite external or software synthesizers with endlessly inspiring arpeggios, adding a new layer of creativity to your productions.

## Version history (last 2 releases)

### 1.0.1 — 2026-11-08

- Fix dropdowns not opening in AUv3
- Fix window sizing on iPhone

### 1.0 — 2026-11-06

No release notes.

## More apps by Aqeel Aadam

- [Weeping Wall](https://appshunter.io/ios/app/weeping-wall/id6475484795)
- [Ridgewalk](https://appshunter.io/ios/app/ridgewalk/id6502917859)
- [Waymaker - Modular Sequencer](https://appshunter.io/ios/app/waymaker-modular-sequencer/id6737984216)
- [Outgrowth - Sample Instrument](https://appshunter.io/ios/app/outgrowth-sample-instrument/id6755965753)
- [Coastline - Audio Effect](https://appshunter.io/ios/app/coastline-audio-effect/id6780281953)
- [Sightlines - Harmonic Filter](https://appshunter.io/ios/app/sightlines-harmonic-filter/id6801937031)

All apps by Aqeel Aadam: https://appshunter.io/developer/1724235864

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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 2026-11-09.*