# GridStep — Grid-based MIDI step sequencer

> Grid-based MIDI step sequencer for music production and live performance. (iPhone/iPad app by Joe Topjian.)

- Source: https://appshunter.io/ios/app/gridstep/id6756443258 (this page in markdown: same URL + `.md`)
- Developer: [Joe Topjian](https://appshunter.io/developer/1860697112)
- Category: Music, Utilities
- Price: $3.99
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 17.6 · 5 MB
- Languages: American English
- Released: 2025-12-19
- Data updated: 2026-09-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gridstep/id6756443258/reviews.md

## What is GridStep?

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.

## Key features

- 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


## Frequently asked questions about GridStep

### What is GridStep?

GridStep is a professional MIDI step sequencer designed for clarity, control, and predictable results. It can be used as a standalone app or an AUv3 plugin.

### What devices does GridStep support?

GridStep is available for iPhone and iPad devices.

### How much does GridStep cost?

GridStep is a paid application priced at $4.99.

### Does GridStep have ads?

No, GridStep does not contain advertisements.

### What are the main editing features in GridStep?

GridStep offers explicit edit modes for Notes, Velocity, Slides, and Mutes, along with precision grid editing and a per-step inspector for detailed control.

### Can GridStep be used with other music apps?

Yes, GridStep functions as an AUv3 MIDI Effect plugin, compatible with hosts like AUM, Drambo, Logic, and Cubasis.

### How often is GridStep updated?

GridStep was last updated on March 9, 2026, indicating active development and support.

### What is the age rating for GridStep?

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

## Version history (last 5 releases)

### 1.6.0 — 2026-09-02

GridStep 1.6.0 has the following improvements:
- Redesigned interface

### 1.5.2 — 2026-03-09

GridStep 1.5.2 has the following improvements:
- Presets between the standalone app and AUv3 plugin can be shared

### 1.5.1 — 2026-03-05

GridStep 1.5.1 has the following improvements:
- Improved external MIDI sync in the standalone app

### 1.5.0 — 2026-03-02

GridStep 1.5.0 has the following improvements:
- GridStep now works as a standalone app and not just an AUv3 plugin

### 1.4.0 — 2026-02-16

GridStep 1.4.0 has the following improvements:
- Added Pattern Trigger mode, which can trigger a whole pattern via MIDI note

## More apps by Joe Topjian

- [Lattice](https://appshunter.io/ios/app/lattice/id6756826552)
- [Rivet 01 - Console](https://appshunter.io/ios/app/rivet-01-console/id6758555219)
- [Rivet 02 - Room](https://appshunter.io/ios/app/rivet-02-room/id6758566292)
- [Rivet 04 - Comb](https://appshunter.io/ios/app/rivet-04-comb/id6758967505)
- [Rivet 03 - Verb](https://appshunter.io/ios/app/rivet-03-verb/id6758967715)

All apps by Joe Topjian: https://appshunter.io/developer/1860697112

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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 2026-09-09.*