# Midiflow vs SWAM Viola

The clearest difference is price: Midiflow at $7.99 against SWAM Viola's $29.99. Midiflow also leads on ratings volume (39 vs 6) and iOS requirement (9.0 vs 15.0). SWAM Viola's advantage is review sentiment (100% vs 59%) and in-app purchases (none vs 3). On update cadence, ads and device support there is nothing between them.

Midiflow costs $7.99 and SWAM Viola $29.99 up front. Midiflow sells 3 one-off in-app purchases. SWAM Viola asks for nothing beyond the download.

SWAM Viola holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Midiflow has 39 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 59% of Midiflow's written reviews are positive against 100% of SWAM Viola's.

Midiflow ships an update every 5 weeks, SWAM Viola every 2 months. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Midiflow | SWAM Viola |
| --- | --- | --- |
| Price | **$7.99** | $29.99 |
| Rating | [4.0 (39 ratings)](https://appshunter.io/ios/app/midiflow/id879915554/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/swam-viola/id1458130582/reviews)** |
| Number of ratings | **39** | 6 |
| Positive reviews | 58.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 4 MB | 103 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Johannes Doerr](https://appshunter.io/developer/622204117) | [Audio Modeling](https://appshunter.io/developer/1326331126) |

## What reviewers say

### Midiflow

[App page](https://appshunter.io/ios/app/midiflow/id879915554)

This app enables seamless MIDI data transfer between different applications on your device. It allows for app synchronization, routing MIDI from sequencers to synths, and assigning keyboard zones. Users can save and recall configurations, and monitor MIDI activity.

**Highlights:** App-to-app MIDI routing, MIDI clock synchronization, Channel filtering and remapping, Note and velocity manipulation, Custom virtual MIDI ports, Preset saving and recall, Controller filtering and remapping (in-app purchase)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Send Controller On Load | $1.99 | one-time |
| Controller Conditions | $2.99 | one-time |
| Controller Remapping | $3.99 | one-time |

**What reviewers like**

- 👍 Comprehensive MIDI routing
- 💡 Flexible MIDI manipulation
- 🚀 Powerful functionality
- ✨ Intuitive interface (for some)
- ✅ Works in background

**What reviewers complain about**

- 🐛 Frequent crashes
- 🐛 App doesn't open
- 🐛 App closes immediately
- 🐛 Bugs and quirks
- 🐛 Unreliable for live use

**Reported bugs**

- Frequent crashes while editing CC map
- Mapped CCs dropped during performance
- App does not open on iOS 10
- Layout issues on iPhone 11 (no 'Done' button)
- App stops working, opens for 2 seconds then closes

**Requested features**

- AUv3 plugin version
- Mass sharing of songs
- Dark mode
- Ability to map multiple notes from one key press
- Individual transpose for split zones


### SWAM Viola

[App page](https://appshunter.io/ios/app/swam-viola/id1458130582)

This virtual instrument uses physical modeling to generate realistic string performances in real-time, responding dynamically to your playing style. It offers advanced spatial control with a built-in room simulator and can be used standalone or as an AUv3 plugin. Designed for expressive control, it's suitable for various musical styles and accessible to visually impaired users.

**Highlights:** Physical modeling sound generation, Real-time dynamic response, Built-in Room Simulator (Ambiente), Standalone and AUv3 plugin support, Intuitive interface for all users, MPE and MIDI controller support, Customizable timbre, vibrato, and dynamics

**In-app purchases:** none


## Frequently asked questions

### Is Midiflow free?

Midiflow costs $7.99, and also offers in-app purchases.

### Is SWAM Viola free?

SWAM Viola costs $29.99, with no in-app purchases.

### Which has better reviews, Midiflow or SWAM Viola?

SWAM Viola is rated higher. Midiflow averages 4.0 out of 5 from 39 ratings, while SWAM Viola averages 4.3 from 6 ratings.

### Do Midiflow or SWAM Viola have ads?

Neither Midiflow nor SWAM Viola shows ads.

### Which is updated more often, Midiflow or SWAM Viola?

Midiflow ships an update every 5 weeks, and SWAM Viola every 2 months. Most recently, Midiflow was updated on October 16, 2026 and SWAM Viola 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.*