# OnAux vs Flex

The clearest difference is in-app purchases: OnAux at none against Flex's 3. OnAux also leads on update cadence (every 3 days vs every 2 months) and ratings volume (8 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Flex sells 3 in-app purchases, starting at $0.99 per month. OnAux asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OnAux against 5.0 for Flex. That said, the two scores are not equally well evidenced: OnAux has 8 ratings behind it against 1, so its average is the more settled of the two.

OnAux ships an update every 3 days, Flex every 2 months. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OnAux | Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/onaux/id6747789754/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/flex-music-player/id6795259400/reviews) |
| Number of ratings | **8** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | **Free** | Freemium |
| Size | 28 MB | 132 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Sachin Katyal](https://appshunter.io/developer/1703522413) | [Elixir CS](https://appshunter.io/developer/6795259402) |

## What reviewers say

### OnAux

[App page](https://appshunter.io/ios/app/onaux/id6747789754)

This app acts as an AI DJ for your events, curating music based on your chosen vibes. It seamlessly blends tracks, plays only the best parts of songs, and ensures a continuous flow for your party.

**Highlights:** AI-powered music curation, DJ-style transitions, Plays best song segments, Vibe selection, Seamless party flow

**Features:** macOS Compatibility

**In-app purchases:** none


### Flex

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

This app allows you to manage and play your personal music library hosted on a Plex Media Server. Enjoy offline playback, customize your queue, and personalize your listening experience with various themes and visualizers.

**Highlights:** Plex Media Server integration, Offline music downloads, Customizable playback queue, Theming and visualizers, Smart playlist management, Lyrics and artwork display, CarPlay and Siri integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flex Music Pro Monthly | $0.99 | per month |
| Flex Music Pro Yearly | $9.99 | per year |
| Flex Music Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is OnAux free?

OnAux 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, OnAux or Flex?

OnAux and Flex are both rated 5.0 out of 5 on the App Store, from 8 and 1 ratings respectively.

### Do OnAux or Flex have ads?

Neither OnAux nor Flex shows ads.

### Which is updated more often, OnAux or Flex?

OnAux ships an update every 3 days, and Flex every 2 months. Most recently, OnAux was updated on November 5, 2026 and Flex on October 31, 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.*