# Soi vs Flex

The clearest difference is rating: Flex at 5.0 against Soi's 4.0. Soi's advantage is in-app purchases (none vs 3) and iOS requirement (10.3 vs 15.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Flex sells 3 in-app purchases, starting at $1.99 per month. Soi asks for nothing beyond the download.

Flex holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Soi | Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/soi/id986051970/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flex-music-player/id6795259400/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | **Free** | Freemium |
| Size | 28 MB | 45 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Aero Deko](https://appshunter.io/developer/507882387) | [Elixir CS](https://appshunter.io/developer/6795259402) |

## What reviewers say

### 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


### Flex

[App page](https://appshunter.io/ios/app/flex-music-player/id6795259400)

This app is a music player and playlist manager for personal Plex Media Server libraries. It allows offline playback, advanced playlist editing, and offers features like scrolling lyrics, visualizers, and CarPlay support. Personalize your music experience with customizable interfaces and hands-free Siri integration.

**Highlights:** Plex Media Server integration, Offline music playback, Advanced playlist editing, Scrolling lyrics with sync, Visualizer styles, CarPlay support, Customizable interface

**Features:** macOS Compatibility, Family Sharing, Siri integration, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flex Music Pro Monthly | $1.99 | per month |
| Flex Music Pro Yearly | $19.99 | per year |
| Flex Music Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Soi free?

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

### Is Flex free?

Flex is free to download, with in-app purchases available.

### Which has better reviews, Soi or Flex?

Flex is rated higher. Soi averages 4.0 out of 5 from 2 ratings, while Flex averages 5.0 from 1 ratings.

### Do Soi or Flex have ads?

Neither Soi nor Flex shows ads.

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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.*