StepPolyArp vs Scope AUv3 Visualizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StepPolyArp
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.
- 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
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"StepPolyArp" is a real-time polyphonic and polyrhythmic MIDI step arpeggiator and step sequencer. It can be used as a standalone application or as an AUv3 MIDI effect plug-in. The application and the plug-in can operate as a step arpeggiator, automatically generating melodic patterns from played notes or chords, or as a step sequencer that does not require MIDI input to play. Unlimited presets can be saved locally and synchronized with iCloud. Each preset contains 16 patterns, 5 customizable polyrhythmic step controllers, and a 32-step event matrix with 11 polyphonic and polyrhythmic lines driving the arpeggiator engine. The application supports full internal and external MIDI connections for input and output, Ableton Link synchronization, and MIDI clock synchronization. An internal sound bank is included. The AUv3 MIDI effect plug-in supports multiple instances. A compatible host is required to run the plug-in. The host must support the Audio Unit v3 (AUv3) MIDI effect format. Hosts supporting AUv3 MIDI effect on iOS: Logic Pro, Cubasis, Beatmaker, AUM, Audiobus, NanoStudio, Auria Pro, apeMatrix. Hosts supporting AUv3 MIDI effect on macOS: Logic Pro 10.7 or later. Features: • Standalone application and AUv3 MIDI effect plug-in • Arpeggiator and step sequencer mode • 1 to 32-step programmable matrix • 11 configurable transposition lines • Polyrhythmic lines and clock dividers per line • Mute by line • Gate, velocity, probability, random pitch, random gate, and random velocity per event • 16 patterns by preset • Automatic pattern chaining • 8-octave resizable keyboard • Multitasking support • Stop "Audio Background" automatically after inactivity (15 min, 30 min, 1 h, 2 h, or never) • Sample-accurate timing • Internal sound bank • Tap tempo • Receiving MIDI from external MIDI sources • Receiving external MIDI sync (MIDI clock) • Ableton Link support • Internal routing of inputs, outputs, and MIDI sync • Send MIDI to a virtual port usable as MIDI input by other "Core MIDI" compatible apps • Default velocity, modulation, pan, volume, aftertouch, and pitch bend step controllers • Customizable MIDI setup for step controllers • Arpeggiator and sequencer can conform to the selected scale • Predefined scales and possibility to create custom scales • 6 arpeggiator modes • 1 random mode • 1 chord mode • Randomization panel for generating random patterns with a large number of parameters to control the result • Preset manager with support for in-app purchase packs • "Program Change" support • Preset sharing via "AirDrop", "Mail", "Messages", and other supported services • Native iCloud support • "iCloud Drive" support in the "Files" app on iOS and "Finder" on macOS • Full support of "Windowed Apps" mode on iPad • Undo/Redo • Lockable keyboard (latch mode) Supported MIDI connections: • Virtual "Core MIDI" connections between applications • Any compatible MIDI interface • MIDI over Wi-Fi • MIDI over Bluetooth • Ableton Link (sync and transport)
Scope AUv3 Visualizer
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.
- Classic phosphor glow effects
- Linear, circular, and Flurry visualization modes
- Multiple color schemes
- Audio-reactive particle dynamics
- Intuitive touch interface
- Smooth 60fps+ performance
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Get professional audio visualization with your AUv3 host or the standalone app. Scope transforms your audio into stunning visual displays using GPU-accelerated graphics with classic phosphor glow effects reminiscent of vintage CRT oscilloscopes and more. Featuring Scope Linear, Scope Circular, Flurry particle, Spectrum, Spectrogram, Spectrum Equalizer, 3D Spectrum, Semaphore, Sliding Scope, Loudness and Polar Level visualization modes with single and multi-channel split view, plus an Overlap option that draws both channels on one canvas in Scope Linear. Multiple color schemes (including classic phosphor green, vibrant 80s Red and Rainbow) with smooth transitions. Flurry mode renders mesmerizing smoke-textured particles with audio-reactive dynamics, inspired by the classic screensaver. Loudness is an ITU-R BS.1770 / EBU R128 meter with integrated, short-term and momentary loudness, true peak per channel, loudness range and a three-minute history against streaming, podcast and broadcast targets. Polar Level is a stereo vectorscope that plots pan position against level in dB, shows out-of-phase content in red and includes a correlation meter. All visualization modes are fully automatable parameters in your DAW. Optimized for HiDPI Retina displays with dynamic line width scaling, Scope delivers smooth 60fps+ performance for live performances, creative sound design and professional audio monitoring. Whether you are analyzing dynamics during mixing, assisting with sound synthesis or adding visual interest to your sessions, Scope provides the precision and aesthetic flexibility you need. Place it anywhere in your signal chain to visualize audio at any point, though it is typically used last to analyze the cumulative effects of your processing chain.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | StepPolyArp | Scope AUv3 Visualizer |
|---|---|---|
| Price | $19.99 | $3.99 — better |
| Rating | 4.8 (48 ratings) — better | 4.2 (21 ratings) |
| Positive reviews | 87.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 48 — better | 21 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 38 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Laurent Colson | DiscoDSP LLC |
Customer experience
StepPolyArp
Scope AUv3 Visualizer
In-app purchases
StepPolyArp
- Dance Horizons$4.99
- Analog Sequence$4.99
Scope AUv3 Visualizer
No in-app purchases
Questions
Is StepPolyArp free?
Is Scope AUv3 Visualizer free?
Which has better reviews, StepPolyArp or Scope AUv3 Visualizer?
Do StepPolyArp or Scope AUv3 Visualizer have ads?
Which is updated more often, StepPolyArp or Scope AUv3 Visualizer?
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