FabFilter Pro vs BLEASS Slow Machine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FabFilter Pro
This professional audio plug-in offers a high-quality equalizer with up to 24 bands, featuring dynamic EQ, linear phase processing, and an intuitive interface. It allows for precise sound shaping with advanced features like spectrum analysis and EQ matching.
- Up to 24 bands with diverse filter types
- Dynamic EQ for every band
- Natural Phase and Linear Phase processing
- Real-time spectrum analyzer with collision detection
- Spectrum Grab for direct adjustment
- EQ Match for tonal characteristic transfer
- Per-band stereo, left, right, mid, or side mode
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FabFilter Pro-Q 3 is a top-quality EQ plug-in with up to 24 bands, perfect analog modeling, dynamic EQ, linear phase processing, and a gorgeous interface with unrivalled ease of use. With its unique Natural Phase mode, it matches both the magnitude and phase response of analog EQing perfectly. Innovative features like Spectrum Grab and collision detection together with its intelligent interactive EQ display make Pro-Q 3 an absolute joy to use. The Pro-Q 3 app filters the microphone input and plays it back in real-time. To use Pro-Q 3 as a plug-in, you need an AUv3-compatible host app like Auria, AUM or Cubasis. Pro-Q 3 will appear in the list of Audio Unit extensions for effect plug-ins in the host app. Key features: - Professional mastering-grade EQ plugin with exceptional sound quality - Up to 24 bands with a huge range of filter types - (New) Dynamic EQ option for every band - Filter shapes: Bell, Notch, High/Low Shelf, High/Low Cut, Band Pass, Tilt Shelf, Flat Tilt (New) - 6-96dB/octave slopes for all filter types - (New) Additional Brickwall slope for the High Cut and Low Cut filters - (New) Per-band Stereo, Left, Right, Mid or Side mode - Zero Latency, Natural Phase and Linear Phase processing modes - Powerful real-time spectrum analyzer - (New) External spectrum visualization from any other Pro-Q 3 instance in the session, including collision detection - Spectrum Grab: grab and adjust a peak directly in the spectrum analyzer (Improved) - EQ Match for imposing the tonal characteristics of one signal on another - Extremely efficient processing and low memory usage - Intelligent multiband selection and editing - Intelligent band solo mode - Piano Display switches the frequency scale to musical note values - Separate Mastering (3/6dB) and Mixing (12/30dB) display ranges - Save, restore and organize presets - Optional Gain-Q interaction - Auto Gain and Gain Scale - Phase Invert option to change polarity - Large output level meter with peak level readout - MIDI Learn with option to control the currently active band - Undo/redo and A/B comparison "Pro-Q 3 is a wonderful update to an (arguably) already class-leading equalizer. The best just got better! Verdict: 10/10!" — Future Music Magazine "Pro-Q 3 is unarguably one of the finest EQ plug-ins around. [...]. Outstanding! Verdict: 10/10!" — Computer Music Magazine
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 price: BLEASS Slow Machine at $6.99 against FabFilter Pro's $29.99. BLEASS Slow Machine also leads on chart position (#180 vs unranked) and device support (3 vs 1). FabFilter Pro's advantage is update cadence (every 5 months vs every 28 months). 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
FabFilter Pro costs $29.99 and BLEASS Slow Machine $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.7 for FabFilter Pro against 4.7 for BLEASS Slow Machine. Both are backed by a comparable volume of ratings — 47 and 38 respectively. Written reviews are what separate them: 78% of FabFilter Pro's written reviews are positive against 82% of BLEASS Slow Machine's.
FabFilter Pro ships an update every 5 months, BLEASS Slow Machine every 28 months. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.
| Parameter | FabFilter Pro | BLEASS Slow Machine |
|---|---|---|
| Price | $29.99 | $6.99 — better |
| Rating | 4.7 (47 ratings) | 4.7 (38 ratings) |
| Positive reviews | 77.8% of reviews | 81.8% of reviews — better |
| Number of ratings | 47 — better | 38 |
| Update frequency | Every 5 months — better | Every 28 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #180 — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 27 MB |
| Age rating | 4+ | +4 |
| Developer | FabFilter | BLEASS |
Customer experience
FabFilter Pro
BLEASS Slow Machine
In-app purchases
FabFilter Pro
No in-app purchases
BLEASS Slow Machine
No in-app purchases









