Comparison

frekvens 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

frekvens

This app offers a unique frequency shifter and stereo delay effect. It utilizes single sideband modulation and an infinite impulse response filter for advanced audio manipulation. Additional features include high/low pass filters and an LFO for delay modulation.

Highlights
  • Frequency shifter
  • Stereo delay
  • High and low pass filter
  • LFO for delay modulation
  • Core MIDI CC input
  • Audiobus and Inter-App Audio support
  • Audio Unit extension
Features
Read full description

Frekvens is a frequency shifter and delay effect. Unlike a pitch shifter all frequencies are shifted linearly and then fed back into itself using the stereo delay unit. The frequency shifting is achieved with single sideband modulation using a hilbert transform and an infinite impulse response filter for fast computations. Frekvens also comes with a high and low pass filter and a lfo for modulating the delay play head. - frequency shifter - high, low pass filter - stereo delay - core midi cc input - audiobus - inter app audio - audio unit extension - save, load

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

frekvens4 screens
BLEASS Slow Machine3 screens

Verdict

The call

The clearest difference is update cadence: frekvens at every 2 months against BLEASS Slow Machine's every 28 months. frekvens also leads on price ($2.99 vs $6.99). 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

frekvens costs $2.99 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 — 4.8 for frekvens against 4.7 for BLEASS Slow Machine. Both are backed by a comparable volume of ratings — 21 and 38 respectively. Written reviews are what separate them: 83% of frekvens's written reviews are positive against 82% of BLEASS Slow Machine's.

UpkeepUpdate frequency

frekvens ships an update every 2 months, BLEASS Slow Machine every 28 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
frekvens versus BLEASS Slow Machine: the parameters behind the verdict, then further details
ParameterfrekvensBLEASS Slow Machine
Price$2.99 — better$6.99
Rating4.8 (21 ratings) — better4.7 (38 ratings)
Positive reviews83.3% of reviews — better81.8% of reviews
Number of ratings2138 — better
Update frequencyEvery 2 months — betterEvery 28 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size3 MB27 MB
Age rating4++4
DeveloperErik SigthBLEASS

Customer experience

frekvens

All ratings21 ratings
Positive95.2%
Neutral0.0%
Negative4.8%
Written reviews18 reviews
Positive83.3%
Neutral5.6%
Negative11.1%

BLEASS Slow Machine

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

In-app purchases

None

frekvens

No in-app purchases

None

BLEASS Slow Machine

No in-app purchases

Questions

Is frekvens free?
frekvens costs $2.99, 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, frekvens or BLEASS Slow Machine?
frekvens is rated higher. frekvens averages 4.8 out of 5 from 21 ratings, while BLEASS Slow Machine averages 4.7 from 38 ratings.
Do frekvens or BLEASS Slow Machine have ads?
Neither frekvens nor BLEASS Slow Machine shows ads.
Which is updated more often, frekvens or BLEASS Slow Machine?
frekvens ships an update every 2 months, and BLEASS Slow Machine every 28 months. Most recently, frekvens was updated on October 12, 2026 and BLEASS Slow Machine on October 7, 2026.

Other comparisons