# StepPolyArp vs Scope AUv3 Visualizer

The clearest difference is price: Scope AUv3 Visualizer at $3.99 against StepPolyArp's $19.99. Scope AUv3 Visualizer also leads on in-app purchases (none vs 2) and update cadence (every 9 days vs every 2 months). StepPolyArp's advantage is rating (4.8 vs 4.2) and review sentiment (87% vs 67%). On ratings volume, ads, monetization model and device support there is nothing between them.

StepPolyArp costs $19.99 and Scope AUv3 Visualizer $3.99 up front. StepPolyArp sells 2 one-off in-app purchases. Scope AUv3 Visualizer asks for nothing beyond the download.

StepPolyArp holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 48 and 21 respectively. Written reviews point the same way: 87% of StepPolyArp's written reviews are positive against 67% of Scope AUv3 Visualizer's.

StepPolyArp ships an update every 2 months, Scope AUv3 Visualizer every 9 days. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | StepPolyArp | Scope AUv3 Visualizer |
| --- | --- | --- |
| Price | $19.99 | **$3.99** |
| Rating | **[4.8 (48 ratings)](https://appshunter.io/ios/app/steppolyarp/id1361313588/reviews)** | [4.2 (21 ratings)](https://appshunter.io/ios/app/scope-auv3-visualizer/id1512571419/reviews) |
| Number of ratings | **48** | 21 |
| Positive reviews | **87.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Paid | Paid |
| Size | 38 MB | 8 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Laurent Colson](https://appshunter.io/developer/381525765) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### StepPolyArp

[App page](https://appshunter.io/ios/app/steppolyarp/id1361313588)

This app functions as a real-time polyphonic and polyrhythmic MIDI step arpeggiator and sequencer. It can generate melodic patterns from input or operate as a standalone sequencer. Save and sync unlimited presets with iCloud, featuring extensive customization for patterns and step controllers.

**Highlights:** Standalone app and AUv3 MIDI effect plugin, Arpeggiator and step sequencer modes, Programmable step matrix with transposition lines, Polyrhythmic step controllers, Internal sound bank, Ableton Link and MIDI sync support, Unlimited preset saving with iCloud sync

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dance Horizons | $4.99 | one-time |
| Analog Sequence | $4.99 | one-time |


### Scope AUv3 Visualizer

[App page](https://appshunter.io/ios/app/scope-auv3-visualizer/id1512571419)

This app provides professional audio visualization with classic oscilloscope effects. It transforms audio into stunning visual displays using GPU-accelerated graphics, offering multiple modes and color schemes. Ideal for live performances, sound design, and audio monitoring.

**Highlights:** Classic phosphor glow effects, Linear, circular, and Flurry visualization modes, Multiple color schemes, Audio-reactive particle dynamics, Intuitive touch interface, Smooth 60fps+ performance

**In-app purchases:** none


## Frequently asked questions

### Is StepPolyArp free?

StepPolyArp costs $19.99, and also offers in-app purchases.

### Is Scope AUv3 Visualizer free?

Scope AUv3 Visualizer costs $3.99, with no in-app purchases.

### Which has better reviews, StepPolyArp or Scope AUv3 Visualizer?

StepPolyArp is rated higher. StepPolyArp averages 4.8 out of 5 from 48 ratings, while Scope AUv3 Visualizer averages 4.2 from 21 ratings.

### Do StepPolyArp or Scope AUv3 Visualizer have ads?

Neither StepPolyArp nor Scope AUv3 Visualizer shows ads.

### Which is updated more often, StepPolyArp or Scope AUv3 Visualizer?

StepPolyArp ships an update every 2 months, and Scope AUv3 Visualizer every 9 days. Most recently, StepPolyArp was updated on October 15, 2026 and Scope AUv3 Visualizer on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*