Sinusoid vs BLEASS Slow Machine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sinusoid
Create music with a retro 8-bit inspired sound machine. Features 4 channels for tones and drums, with extensive sound sculpting options like filters, modulation, and effects. Export your creations and integrate with other music apps.
- 4 sound channels (3 tones, 1 drum/noise)
- Extensive audio parameters (envelope, vibrato, glide, filter)
- Ring modulation and FM synthesis
- Arpeggiator, delay, and bit crusher effects
- MIDI input and output support
- Audiobus, IAA, and AUv3 integration
- AIFF export and in-app music player
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Sinusoid is a tracker/sequencer sound machine inspired by retro 8 bit game consoles. It has 4 sound channels where 3 play tones and 1 plays drums and noise. It has audio parameters like pan, amplitude envelope, vibrato, pitch glide, a resonant filter and second oscillator for ring modulation and fm. Further sculpt the sound with an arpeggiator, delay and bit crusher. Export songs to AIFF and listen to them in the in app music player or share them with other apps. MIDI can be used to control parameters, play and input notes. MIDI out makes it possible to play other synths with sinusoid using Core MIDI, Bluetooth, IAA MIDI or AUv3 MIDI. Connect to other sound apps using Audiobus, Inter App Audio or AUv3. +++ 3 tone channels: sinusoid, square, triangle, saw, pulse (75%, 50%, 25% or 12.5%) +++ 1 drum/noise channel +++ Stereo pan +++ Amplitude envelope (attack, length and release) +++ 2nd oscillator for fm and ring modulation +++ Vibrato +++ Pitch glide +++ Resonant filter +++ Arpeggio/stutter +++ Tape delay +++ Bit/samplerate crush +++ Per note ability to override all channel audio parameters +++ Copy/paste between devices on the same network +++ Save and share projects using “open with” and files app drag’n drop +++ Export to songs to AIFF +++ Core MIDI, Bluetooth, IAA MIDI, AUv3 MIDI +++ Audiobus, IAA and AUv3
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.
- 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
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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
Verdict
The clearest difference is update cadence: Sinusoid at every 3 months against BLEASS Slow Machine's every 28 months. Sinusoid also leads on rating (4.9 vs 4.7) and price ($4.99 vs $6.99). BLEASS Slow Machine's advantage is review sentiment (82% vs 69%) and chart position (#183 vs unranked). On ratings volume, ads, in-app purchases and monetization model 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
Sinusoid costs $4.99 and BLEASS Slow Machine $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sinusoid holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 13 and 38 respectively. Written reviews complicate that: 69% of Sinusoid's written reviews are positive against 82% of BLEASS Slow Machine's, so the app with the better star average is not the one people write more warmly about.
Sinusoid ships an update every 3 months, BLEASS Slow Machine every 28 months. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.
| Parameter | Sinusoid | BLEASS Slow Machine |
|---|---|---|
| Price | $4.99 — better | $6.99 |
| Rating | 4.9 (13 ratings) — better | 4.7 (38 ratings) |
| Positive reviews | 68.8% of reviews | 81.8% of reviews — better |
| Number of ratings | 13 | 38 — better |
| Update frequency | Every 3 months — better | Every 28 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #183 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 7 MB | 27 MB |
| Age rating | 4+ | +4 |
| Developer | Erik Sigth | BLEASS |
Customer experience
Sinusoid
BLEASS Slow Machine
In-app purchases
Sinusoid
No in-app purchases
BLEASS Slow Machine
No in-app purchases









