# subflow — crisp music visualizer

> Interactive music visualizer with gesture and UDP/OS2L control. (iPhone/iPad app by Ello Skelling Productions.)

- Source: https://appshunter.io/ios/app/subflow/id1570176211 (this page in markdown: same URL + `.md`)
- Developer: [Ello Skelling Productions](https://appshunter.io/developer/1569508906)
- Category: Entertainment
- Price: Free
- Rating: 4.30/5 from 17 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 3 MB
- Languages: American English
- Released: 2021-06-06
- Data updated: 2026-07-19
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/subflow/id1570176211/reviews.md

## What is subflow?

Crisp visualizations for your music stage or living room. Tap left or right edge of screen to change modes. Vertical swipes change speed. Tap the upper half of the screen several times to set a beat pattern. Tap the lower half to cancel or to add single beats. Horizontal swipes fine-tune the beat alignment. Long press will change color. You can also send more complex command sequences over UDP, and you can control via OS2L using most DJ software. See http://subflow.org/

## Key features

- Gesture-based control for modes, speed, and beats
- Beat pattern customization
- UDP command sequencing
- OS2L integration with DJ software
- Color customization via long press

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/subflow/id1570176211/reviews.md

### 5/5 — so tuff twin

*2025-10-04*

Woahhhhh so tuff man I’m so mesmerized

### 1/5 — I’ll do you a favor

*2024-12-21*

This app is less than what you would expect a high school student could develop. That’s 5 minutes of my life I’m not getting back.

### 5/5 — Motion has stopped with new color option

*2024-12-02*

Hey, folks! After the last update, my vertical swipes are broken. Everything else works, but all motion except “beats” has stopped. Can’t get anything to move, fast or slow, except beats. Can you patch / fix?

### 5/5 — this is honestly cool if you know how to use it

*2024-11-22*

i've been vibing with this at times whenever i get bored, and it helps relax a bit as well. 
here's how to work it by the way:
landscape view controls only
double tap sides = switch form
tap center = bpm control (need to have good rhythm)
tap middle (NOT CENTER) = bpm reset
hold for ~4 seconds = color switch (red/white only)

anyways, cool app!

### 1/5 — Trash

*2024-07-25*

does not function as described, scam

### 5/5 — you need this if you have "focus trouble" and use stage manager with an external display

*2024-04-17*

i love using stage manager with a second screen but sometimes you really need to focus on one thing and not get distracted and either duplicate the displays or find something for the other screen that won't distract you - something more conducive to focusing on the other screen. even the home screen makes it hard when i'm trying to focus on on my writing. this app though? it's absolutely perfect. you can set it to a flowing pattern with no beat if you're listening to stuff with complex time or if you're listening to a big long trance mix you just put the beat in and you're good for as long as the music goes. now when you look at the other screen there's a soothing mathematical that helps you become more focused instead of less, and you can look at the monitor that's set up for your optimal neck posture when typing

i figure this would also work with someone with adhd but all i know is it works for me and i have a dissociative disorder

oh but please make sure to read the actual description on here because the app itself will not tell you how to set a beat!

## Frequently asked questions about subflow

### What devices does subflow support?

subflow is available on Apple TV, iPhone, and iPad, offering a versatile visual experience across multiple Apple platforms.

### How often is subflow updated?

The latest version, 2.15, was last updated on April 1, 2026. Users can expect ongoing improvements and feature additions.

### What is the age rating for subflow?

subflow has an age rating of 4+, making it suitable for a wide audience of users.

### Does subflow have ads?

No, subflow does not contain advertisements, providing an uninterrupted visual experience.

### How can I change the visual modes in subflow?

You can change visual modes by tapping the left or right edge of the screen. This allows for quick and easy customization of your music visualization.

### Can subflow be controlled with DJ software?

Yes, subflow supports OS2L control, allowing integration with most DJ software for advanced command sequences and synchronization.

### What is the user sentiment for subflow?

subflow is rated 4.3 stars from 16 ratings, indicating a generally positive user reception and satisfaction with its features.

### How do I adjust the speed of the visualizations in subflow?

You can adjust the speed of the visualizations by performing vertical swipes on the screen. This provides a fluid way to fine-tune the animation tempo.

## Version history (last 5 releases)

### 2.16 — 2026-07-06

New: Pinch in/out to change line thickness (and overall brightness)
Fixed a bug where the app could get stuck in OFF mode.
Added some input sanitization of the UDP API.

### 2.15 — 2026-04-01

Updated from AppDelegate to UIScene to avoid future deprecation.
No functional changes.

### 2.14 — 2026-03-27

Updated for XCode 26.3.
Refactored fragile code and improved command parsing.
Finally added some tests; only for the iOS version, but all that code is common with the TV app.
Functional change: transitions from/to spiral mode should be smoother and prettier.
Due to Apple's new entitlements: if using UDP to send commands to the app, you will need to allow network discovery.
Connections from a DJ deck (OS2L) should work as before with no new authorizations needed.

### 2.13 — 2023-05-31

Added 64-bit color palette. Set via UDP or OS2L (see https://subflow.org/controls.html).
Long press on the screen or remote will switch between white (default) and red (low light).

### 2.11 — 2023-05-31

Added red mode for low-light scenes. Activate/deactivate with long press, or via UDP and OS2L (see https://subflow.org/controls.html)

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## More apps by Ello Skelling Productions

- [NerdTrack](https://appshunter.io/ios/app/nerdtrack/id6739551225)
- [wwvbgps](https://appshunter.io/ios/app/wwvbgps/id6760921500)

All apps by Ello Skelling Productions: https://appshunter.io/developer/1569508906

## Related topics

[ello skelling productions](https://appshunter.io/ios/topics/ello-skelling-productions) · [free music visualizer](https://appshunter.io/ios/topics/free-music-visualizer) · [visualizer](https://appshunter.io/ios/topics/visualizer) · [visualizer music](https://appshunter.io/ios/topics/visualizer-music)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-19.*