SlowMoFX

SlowMoFX

Slow Motion Audio Effects

13 ratings
10 reviews
$9.99

Details

  • Released
  • Updated
  • October 22, 2020
  • September 8, 2025

Features

SlowMoFX screenshot #1 for iPhone
SlowMoFX screenshot #2 for iPhone
SlowMoFX screenshot #3 for iPhone
SlowMoFX screenshot #4 for iPhone
SlowMoFX screenshot #5 for iPhone
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About

This audio effect plugin allows users to seamlessly blend incoming audio with a slowed-down version, creating unique half-speed effects. It offers adjustable slowdown speeds, filtering, and built-in effects like delay and reverb for sound manipulation.

Half-speed audio effect
Adjustable slowdown speeds (1.5x, 2x, 4x)
Low and high pass filters
Built-in delay and reverb
Ping Pong and Reverse modes
MIDI automation support
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What's New in SlowMoFX

1.04

September 8, 2025

v1.04 B16 Updated for compatability with future iOS versions.

Charts

Top Paid

📉 186-19

Music

This app dropped -19 positions in Music chart.

Last updated on July 12, 2026.

User reviews

It don‘t work

I use Garageband. And every time i play from the begining the effect turn off. I think it work like Cableguys Halftime or Grossbeat from Fl Studio.

Needs static “on” “start”

I think me and a lot of others expected this to behave like Cable Guys Halftime. It’d be awesome if you could have a button to lock the ”on” “start” state..

I love all your apps but that one problem makes this one unusable. Check out Cable Guys Halftime pleaseee...

Will change to 5 stars as soon as that’s implemented 🙂
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Halftime

Can we keep halftime on at all times in the next update? So I can just leave audio at half speed playback instead of having to record my slowed down audio into other apps. I get the idea but that would be a nice add on for the few users like myself that just needs a good app the resembles halftime by cable guys on the pc.
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Dope Fx

The Fx would have gotten 5 stars if i didn’t have to set an automation on the power button to get it to work.

Response from developer

There is no power button on this effect, just a start/stop button. Most DAW's stop audio flow when the transport is not running which is why the plugin enters stop state when the transport halts. We can't play historical audio at half speed if we don't have it.

Real Downtempo Vibes

The plugin sounds great and has a lot of extra effects to further affect the color and texture of the sound. Unfortunately, like with all 4Pockets apps, knobs movements are choppy. Despite my moving my finger in a linear matter, the knobs sometimes jump 20-50% of their range. I did not really encounter this in any other apps, plug-ins.
Also in my setup (NanoStudio 2 on iPad mini) the horizontal windows of the plugin is very much squeezed in NanoStudio’s plugin tab. To be able to move any of the knobs, it is necessary to expand it (one extra click every time when accessing plugin controls). The most optimal would be if the plugins window could resize itself to more or less square format (if it’s possible from developers side). But making the knobs behave more predictably would be overall much more welcome improvement.

Thanks in advance.
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Developer apps

FAQ

What is SlowMoFX?

SlowMoFX is an AUv3 audio plugin designed to create half-speed and other tempo-synced audio effects. It allows you to mix original audio with a slowed-down version, offering creative possibilities for sound manipulation.

What devices does SlowMoFX support?

SlowMoFX is available for iPhone, iPad, and iPod. It functions as an AUv3 plugin, meaning it requires a compatible host application like AUM.

How much does SlowMoFX cost?

SlowMoFX is a paid application priced at $9.99. There are no in-app purchases or subscription fees associated with its use.

Does SlowMoFX have ads?

No, SlowMoFX does not contain advertisements. As a paid application, it provides an uninterrupted user experience.

What are the different slowdown speeds available in SlowMoFX?

SlowMoFX offers several slowdown options, including 1.5x for generating triplets and syncopated beats, 2x for a standard half-speed effect, and 4x for a darker, more atmospheric sound.

Can I automate parameters in SlowMoFX?

Yes, SlowMoFX supports parameter and MIDI automation for its main controls. This allows for dynamic and evolving soundscapes within your music productions.

How often is SlowMoFX updated?

The latest version of SlowMoFX is 1.04, which was last updated on September 8, 2025. This indicates regular maintenance and potential feature additions.

What is the user sentiment for SlowMoFX?

Based on 13 ratings, SlowMoFX has an average rating of 3.7 stars. This suggests a generally positive reception, though there is room for improvement.