# modstep vs PolyPhase

The clearest difference is price: modstep at $9.99 against PolyPhase's $19.99. modstep also leads on iOS requirement (7.0 vs 10.0). PolyPhase's advantage is rating (4.6 vs 2.8) and review sentiment (76% vs 46%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

modstep costs $9.99 and PolyPhase $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PolyPhase holds the better App Store score, 4.6 against 2.8. Both are backed by a comparable volume of ratings — 39 and 26 respectively. Written reviews point the same way: 46% of modstep's written reviews are positive against 76% of PolyPhase's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on June 10, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | modstep | PolyPhase |
| --- | --- | --- |
| Price | **$9.99** | $19.99 |
| Rating | [2.8 (39 ratings)](https://appshunter.io/ios/app/modstep/id966990643/reviews) | **[4.6 (26 ratings)](https://appshunter.io/ios/app/polyphase/id1440617668/reviews)** |
| Number of ratings | **39** | 26 |
| Positive reviews | 45.8% of reviews | **76.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Paid | Paid |
| Size | 99 MB | 35 MB |
| Requires iOS | **7.0** | 10.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christian Blomert](https://appshunter.io/developer/385949478) | [Marcos Kohler](https://appshunter.io/developer/1024379665) |

## What reviewers say

### modstep

[App page](https://appshunter.io/ios/app/modstep/id966990643)

Create music with a powerful MIDI sequencer for iPad. Control external hardware, IAA apps, and Audio Units. Features unlimited tracks, real-time editing, and integrated synths/samplers for on-the-go or studio production.

**Highlights:** Session-style MIDI sequencer, Unlimited tracks and scenes, Real-time editing and modulation, Integrated synth and sampler, IAA and Audio Unit integration, Ableton Link sync, MIDI and Audio export

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🎛️ Powerful MIDI sequencing capabilities
- 🎨 Clean and polished user interface design
- 🔗 Excellent integration with external hardware and IAA/AU apps
- 🎵 Ableton Live-like clip launching workflow
- 🎚️ Extensive automation and CC control options

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- ⏸️ App appears abandoned with no recent updates
- 🔌 IAA/AU instrument loading causes crashes
- 📖 Poor documentation and lack of tutorials
- 🎚️ Confusing and unintuitive user interface

**Reported bugs**

- App crashes when loading external IAA/AU instruments
- Constant clicking sound with metronome off
- Projects fail to load or require multiple restart attempts
- MIDI input routing ignores channel settings
- Track names change when using 'save as' function

**Requested features**

- Undo/redo functionality
- MIDI import capability
- Pre-roll for recording
- Dedicated mixer with send/returns
- Audio loop recording and playback


### PolyPhase

[App page](https://appshunter.io/ios/app/polyphase/id1440617668)

Create complex, interwoven melodies and rhythms with a generative sequencer. Control note generation, randomize sequences, and integrate with external MIDI hardware or the included wavetable synthesizer. Save and recall your creations with presets and snapshots.

**Highlights:** Generative melody creation with phase offsets, 8 independent sequencers with customizable properties, Draw own notes or use intelligent randomization, Wavetable synthesizer with FX, MIDI output and input support, Global Key/Scale filtering and Chord Masks, Save/Load presets and Snapshots

**In-app purchases:** none


## Frequently asked questions

### Is modstep free?

modstep costs $9.99, with no in-app purchases.

### Is PolyPhase free?

PolyPhase costs $19.99, with no in-app purchases.

### Which has better reviews, modstep or PolyPhase?

PolyPhase is rated higher. modstep averages 2.8 out of 5 from 39 ratings, while PolyPhase averages 4.6 from 26 ratings.

### Do modstep or PolyPhase have ads?

Neither modstep nor PolyPhase shows ads.

### Which is updated more often, modstep or PolyPhase?

modstep ships an update every 3 weeks, and PolyPhase every 3 weeks. Most recently, modstep was updated on June 10, 2026 and PolyPhase on June 8, 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.*