# StepPolyArp vs Ribn

The clearest difference is price: Ribn at $3.99 against StepPolyArp's $19.99. Ribn also leads on in-app purchases (none vs 2) and update cadence (every 3 days vs every 2 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for StepPolyArp against 4.8 for Ribn. Both are backed by a comparable volume of ratings — 48 and 30 respectively. Written reviews are what separate them: 87% of StepPolyArp's written reviews are positive against 91% of Ribn's.

StepPolyArp ships an update every 2 months, Ribn every 3 days. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | StepPolyArp | Ribn |
| --- | --- | --- |
| Price | $19.99 | **$3.99** |
| Rating | [4.8 (48 ratings)](https://appshunter.io/ios/app/steppolyarp/id1361313588/reviews) | [4.8 (30 ratings)](https://appshunter.io/ios/app/ribn/id1413777040/reviews) |
| Number of ratings | **48** | 30 |
| Positive reviews | 86.7% of reviews | **90.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Paid | Paid |
| Size | 38 MB | 28 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Laurent Colson](https://appshunter.io/developer/381525765) | [Nebojsa Petrovic](https://appshunter.io/developer/639977744) |

## 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 |


### Ribn

[App page](https://appshunter.io/ios/app/ribn/id1413777040)

This app provides a unique MIDI controller experience with 8 assignable ribbons. It allows you to record and loop finger movements, adding organic modulation to synthesizers and effects. Control various MIDI-responsive gear, from hardware synths to software instruments.

**Highlights:** 8 MIDI CC ribbon pads, Record and loop finger movement, Configurable MIDI channel and CC# per ribbon, Turn off looping for regular slider functionality, Switch between 3 sets of configurations with presets, MIDI sending in background, iPad landscape mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is StepPolyArp free?

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

### Is Ribn free?

Ribn costs $3.99, with no in-app purchases.

### Which has better reviews, StepPolyArp or Ribn?

StepPolyArp and Ribn are both rated 4.8 out of 5 on the App Store, from 48 and 30 ratings respectively.

### Do StepPolyArp or Ribn have ads?

Neither StepPolyArp nor Ribn shows ads.

### Which is updated more often, StepPolyArp or Ribn?

StepPolyArp ships an update every 2 months, and Ribn every 3 days. Most recently, StepPolyArp was updated on September 22, 2026 and Ribn on September 12, 2026.

---

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