Comparison

AUFX vs BLEASS Slow Machine

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AUFX

This app offers a versatile stereo delay audio effect with extensive customization options. It can produce a wide range of sounds, from clean digital delays to gritty dub echoes and flangers. The app supports processing external audio and other applications, with features for saving and sharing presets.

Highlights
  • High quality 32-bit DSP engine
  • Tape simulation (noise and warble)
  • Filters in the delay loop
  • Stereo delay, detune, and ping-pong
  • Dual LFO for modulation
  • Inter-App Audio and Audiobus support
  • Save, load, and share presets
Features
Read full description

A highly tweakable stereo delay audio effect, suitable for everything from clean digital delays to filthy dub echoes, flangers and broken cassette tapes. This app is part of the AUFX series, a collection of simple and powerful audio effect apps. • High quality 32-bit DSP engine. • A multitude of parameters to tweak to get a wide range of sounds. • Tape simulation (noise and warble). • Filters in the delay loop for typical dub sound. • Stereo delay, stereo detune, ping-pong delay. • Sinewave and random dual LFO for flangers and other modulations. • Process hardware input/output. • Process other apps through Inter-App Audio or Audiobus (input/filter/output slots supported). • Save, load and share user presets. • Supports Audiobus2 state saving • Comes with several bundled presets. • Fully MIDI controllable, including Virtual MIDI. • Background Audio. • Built-in lookahead limiter to prevent clipping. • Record the result directly in app. • Email recordings or export to AudioShare audio document manager app. • Access user presets and recordings through iTunes File Sharing.

About

BLEASS Slow Machine

This music effect app offers creative ways to manipulate audio, allowing you to slow down tracks, create tape stop effects, and program speed variations. It provides precise control over rhythm, pitch, and timing for unique sound design.

Highlights
  • Creative slow down effect
  • Tape stop effect with performance controls
  • Speed sequencer for programmed variations
  • Adjustable loop size and speed
  • Filter for frequency band control
  • Multiple time stop modes
Read full description

Thanks to 3 different yet complementary ways of manipulating time with creativity, BLEASS Slow Machine can deepen any beat by completely or partially slowing down the audio signal, transform epic leads into heavy basses, and add some “tape stop” effect with precision either by touching the X/Y Stop trigger, or by dialing in precise sequence automations. TECHNICAL DESCRIPTION: BLEASS Slow Machine offers both sequenced and live ways to manipulate time thanks to 3 stages: ____ SLOW DOWN stage: Creative and straightforward slow down effect that modulates both rhythm and pitch. - Loop Size: Slow Down resets its reading position according to the Loop Size. A Loop Size of ‘1 bar’ means that the reading position is resynced with the host reading position every 1 bar. - Speed: controls the speed of the played loop relative to the default speed. (For example ‘½’ means that audio is played back at half its original speed, which means one octave lower). - Quantization: When this option is ON, every change in Loop Size and in Speed will wait until the end of the current loop to be effective. When it is set to OFF, the change is immediate. - Filter: keep a selected frequency band of the slowed signal. When the filter is ON, the middle colored band is processed by the effect while the low and high bands remain unchanged. - Fade: Sets the duration of the crossfade between loops. - State: Activates or deactivates the SLOW DOWN stage - Dry/Wet: mixes the dry and wet signals ____ TIME STOP stage: Especially made for performance, TIME STOP gives an intuitive and visual way to instantly create a classic tape stop effect. - Trigger: the “Stop” button triggers the time stop effect within a given duration (set by the position of your finger along the Y-axis) and following a curve (set by the position of your finger along the X-axis). - Mode: choose between 4 time stop modes: ‘Step’, ‘Ramp Up & Down, ‘Ramp Down’ and ‘Ramp Up’. _ In ‘Step’ mode, the speed instantly goes to 0 when the trigger is hit and goes back to 1 when the trigger is released. _ In ‘Ramp Up & Down’ mode the speed is ramped down to 0 when the trigger is hit and ramped up to 1 when it is released. The duration and curve of the ramp is set by the position of your finger on the control. _ In ‘Ramp Down’ mode, the speed is ramped down to 0 when the trigger is hit and instantly goes back to 1 when released. _ In ‘Ramp Up’ mode the speed instantly goes to 0 when the trigger is hit and is ramped up to 1 when released. - Hold: when Hold is ON, the trigger is not released until Hold is turned OFF. - Speed: precise control of the play speed. - State: Activates or deactivates the TIME STOP stage - Dry/Wet: mixes the dry and wet audio signals ____ SPEED SEQUENCER stage: The speed sequencer stage offers a unique way to program speed variations in your music. - Length: sets the number of steps in the sequencer. - Resolution: sets the duration of a sequencer step. - Grid Snap: when ON, steps snap to the grid allowing a precise rhythmic and harmonic editing. - Sequencer: sets a playing speed per step. Each step has 4 different curve modes: ‘Step’, ‘Link’, ‘Ramp Up’ and ‘Ramp Down’. Change the curve mode by tapping the curve icon at the bottom of each step. - Amount: controls the amount of sequencer speed modulation. 100% means that speed can go from 1 to 0 (50% means that speed can go from 1 to 0.5). - Randomness: sets the amount of randomness of the sequencer. If randomness is 50%, a step value will be a random value between stepValue +/- 0.5 - Fade: controls the crossfade duration between each step. - State: Activates or deactivates the Speed Sequencer stage - Dry/Wet: mixes the proportion of dry and wet signals Check out www.bleass.com for video tutorials and more info! * PLEASE NOTE: this is an Audio Unit Effect plugin (AUv3) which requires a compatible host such as AUM, GarageBand, Cubasis, BM3 or Auria. Standalone mode also available for demo purposes.

Screenshots

AUFX4 screens
BLEASS Slow Machine3 screens

Verdict

The call

The clearest difference is update cadence: AUFX at every 2 months against BLEASS Slow Machine's every 28 months. AUFX also leads on price ($4.99 vs $6.99) and iOS requirement (9.0 vs 12.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

AUFX costs $4.99 and BLEASS Slow Machine $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for AUFX against 4.7 for BLEASS Slow Machine. Both are backed by a comparable volume of ratings — 33 and 38 respectively. Written reviews are what separate them: 90% of AUFX's written reviews are positive against 82% of BLEASS Slow Machine's.

UpkeepUpdate frequency

AUFX ships an update every 2 months, BLEASS Slow Machine every 28 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
AUFX versus BLEASS Slow Machine: the parameters behind the verdict, then further details
ParameterAUFXBLEASS Slow Machine
Price$4.99 — better$6.99
Rating4.6 (33 ratings)4.7 (38 ratings) — better
Positive reviews89.7% of reviews — better81.8% of reviews
Number of ratings3338 — better
Update frequencyEvery 2 months — betterEvery 28 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better12.0
Further details — not scored
Size6 MB27 MB
Age rating4++4
DeveloperKymatica ABBLEASS

Customer experience

AUFX

All ratings33 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews68 reviews
Positive89.7%
Neutral1.5%
Negative8.8%

BLEASS Slow Machine

All ratings38 ratings
Positive94.7%
Neutral0.0%
Negative5.3%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

Bugs and requests

AUFX

Reported bugs

4 issues
  • Crashes when loading presets
  • Loading presets causes crash
  • Will NOT launch in AUM
  • Workarounds don't work

Requested features

10 requests
  • AUv3 support
  • Add creativity, functions, magic
  • AUv3 would solve the only problem
  • AUv3 compliance
  • Add AU3
Show 5 more
  • AUFX 5 release date
  • AU3 support needed
  • Morphing time function
  • Update ASAP
  • Fix preset loading crash

BLEASS Slow Machine

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

AUFX

No in-app purchases

None

BLEASS Slow Machine

No in-app purchases

Questions

Is AUFX free?
AUFX costs $4.99, with no in-app purchases.
Is BLEASS Slow Machine free?
BLEASS Slow Machine costs $6.99, with no in-app purchases.
Which has better reviews, AUFX or BLEASS Slow Machine?
BLEASS Slow Machine is rated higher. AUFX averages 4.6 out of 5 from 33 ratings, while BLEASS Slow Machine averages 4.7 from 38 ratings.
Do AUFX or BLEASS Slow Machine have ads?
Neither AUFX nor BLEASS Slow Machine shows ads.
Which is updated more often, AUFX or BLEASS Slow Machine?
AUFX ships an update every 2 months, and BLEASS Slow Machine every 28 months. Most recently, AUFX was updated on October 17, 2026 and BLEASS Slow Machine on October 7, 2026.

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