# iFretless Brass vs Soi

The clearest difference is review sentiment: iFretless Brass at 68% against Soi's 0%. iFretless Brass also leads on rating (4.9 vs 4.0) and chart position (#163 vs unranked). Soi's advantage is price (Free vs $9.99) and iOS requirement (10.3 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

Soi is free to download; iFretless Brass costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iFretless Brass holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: iFretless Brass has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 68% of iFretless Brass's written reviews are positive against 0% of Soi's.

iFretless Brass ships an update every 6 weeks, Soi every 2 months. The most recent releases landed on October 26, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | iFretless Brass | Soi |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.9 (10 ratings)](https://appshunter.io/ios/app/ifretless-brass/id915761815/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/soi/id986051970/reviews) |
| Number of ratings | **10** | 2 |
| Positive reviews | **68.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#163** | — |
| Size | 241 MB | 28 MB |
| Requires iOS | 15.6 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Mangoo Consulting Company Limited](https://appshunter.io/developer/1475107602) | [Aero Deko](https://appshunter.io/developer/507882387) |

## What reviewers say

### iFretless Brass

[App page](https://appshunter.io/ios/app/ifretless-brass/id915761815)

**Currently charting:** #163 Top Paid · Music (US App Store)

This app allows string instrument players to create expressive music using a variety of brass and synth sounds. It features detailed sample libraries and advanced touch sensitivity for natural performance. Supports MIDI and Audio Unit integration for external devices and recording apps.

**Highlights:** Expressive brass and synth sounds, Detailed sample library, Advanced touch pressure detection, Natural vibrato and slides, MIDI input/output support, Audio Unit integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Soi

[App page](https://appshunter.io/ios/app/soi/id986051970)

Create and improvise music with others in real-time. This expressive instrument allows groups of any size to perform together, automatically harmonizing and synchronizing participants for an engaging experience where there are no wrong notes.

**Highlights:** Real-time music creation, Group improvisation, Automatic harmonization, Participant synchronization, Ensemble performance

**In-app purchases:** none


## Frequently asked questions

### Is iFretless Brass free?

iFretless Brass costs $9.99, with no in-app purchases.

### Is Soi free?

Soi is free to download, with no in-app purchases.

### Which has better reviews, iFretless Brass or Soi?

iFretless Brass is rated higher. iFretless Brass averages 4.9 out of 5 from 10 ratings, while Soi averages 4.0 from 2 ratings.

### Do iFretless Brass or Soi have ads?

Neither iFretless Brass nor Soi shows ads.

### Which is updated more often, iFretless Brass or Soi?

iFretless Brass ships an update every 6 weeks, and Soi every 2 months. Most recently, iFretless Brass was updated on October 26, 2026 and Soi on October 11, 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.*