Stereo Phaser vs GridStep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stereo Phaser
This audio effect app provides a stereo phaser with adjustable rate, depth, feedback, and stereo spread. It functions as an Audio Unit AUv3 plugin for hosts like GarageBand or as a standalone application for real-time audio processing.
- Stereo phaser effect
- Adjustable rate, depth, feedback
- Stereo spread control
- Audio Unit AUv3 plugin
- Standalone app mode
- Real-time audio processing
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That is nice phaser effect that can run in stereo mode. The app is Audio Unit AUv3. In stereo mode the signal is split and run through 2 phaser effects with different frequency settings but same rate, depth and feedback that are shifted in stereo space with the same rate(same as the phasers’) The app is an Audio Unit Effect AUV3 and can be used inside GarageBand or other AU host apps as an effect plug-in. Stereo Phaser can also run as a stand alone app adding effect to the audio input so you can play your guitar, bass or synth directly through the app if you have the connector to do so. Stereo Phaser controls: - Rate - that is the phaser speed - Depth - phaser depth - Feedback - effect feedback - Stereo - stereo spread
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 Stereo Phaser's 1.0. GridStep also leads on update cadence (every 2 weeks vs every 38 months) and ratings volume (3 vs 1). Stereo Phaser's advantage is price ($1.99 vs $3.99) and iOS requirement (10.0 vs 17.6). 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
Stereo Phaser costs $1.99 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 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
Stereo Phaser ships an update every 38 months, GridStep every 2 weeks. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.
| Parameter | Stereo Phaser | GridStep |
|---|---|---|
| Price | $1.99 — better | $3.99 |
| Rating | 1.0 (1 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 38 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 10 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | Joe Topjian |
Customer experience
Stereo Phaser
GridStep
In-app purchases
Stereo Phaser
No in-app purchases
GridStep
No in-app purchases









