FabFilter Pro vs Combustor
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 flexible gate and expander functionality for mixing and mastering. It features multiple algorithms, precise metering, and customizable side chain options for real-time audio filtering. Requires a compatible host app to function as a plug-in.
- Multiple expander/gate algorithms
- Program-dependent attack/release
- Precise metering and level display
- Low CPU usage
- Adjustable range, hold, and knee
- External side chain and MIDI triggering
- Factory presets
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FabFilter Pro-G is a high quality gate/expander plug-in for mixing and mastering purposes, with flexible side chain options and great interface design. The Pro-G app filters the microphone input and plays it back in real-time. To use Pro-G as a plug-in, you need an AUv3-compatible host app like Auria, AUM or Cubasis. Pro-G will appear in the list of Audio Unit extensions for effect plug-ins in the host app. Key features: - Five perfectly fine-tuned expander/gate algorithms: Classic, Clean, Vocal, Guitar and an upward expansion style - Beautifully program-dependent attack and release curves - Precise and helpful metering, including a real-time level display - Low CPU usage - Adjustable range, hold time and knee settings - Optional look-ahead time up to 10 ms - Expert mode that offers highly customizable side chain and level options, conveniently hidden in normal mode - Mono, stereo or mid/side processing - Up to four times linear-phase oversampling - Zero-latency operation mode - External side chain option - MIDI triggering: open the gate/expander with your MIDI keyboard - Separate dry/wet level settings - Easy to set up for common gating/expansion situations with the included factory presets - Undo/redo and A/B comparison "FabFilter's slick, innovative interfaces make FabFilter Pro-G a joy to use. For pros and beginners alike, Pro-G is a superb tool!" — Music Tech Magazine
Combustor
This audio effect extension transforms tracks with a unique time-bending resonator. Create vibrant textures, subtle resonances, and dynamic sweeps. It's designed for electronic musicians and producers seeking to add wild or organic qualities to their sounds.
- Time bending resonator effect
- Creates distorted textures and physical resonance
- Envelope follower for dynamic control
- MIDI input for melodic control
- Performative interface
- AUv3 compatible
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*** Note: Combustor is an Audio Unit effect extension and requires an AUv3 compatible host app, like Logic Pro, Drambo or GarageBand. It does not run as a standalone app *** Combustor is a unique, wild resonating body fashioned to spice up or extremely transform your tracks. At the heart of Combustor is a custom time bending resonator that doesn't sound like anything you have heard before. You can create anything from vibrant, distorted texture, perfectly suited for "hardcore" electronic musicians, to subtle physical resonance, which is often lacking in synthesized sounds. Combustor contains an envelope follower, to create dynamic-controlled pitch or filter sweeps. It also has MIDI input, that controls resonator's pitch, to make something melodic and organic out of non-melodic sounds, like drums. With just a few knob turns, a boring sound can be turned into screaming madness that sounds like it went out of control. A simple and straightforward interface makes Combustor a performative tool that allows you to directly interact with your sound.
Screenshots
Verdict
The clearest difference is price: Combustor at $4.99 against FabFilter Pro's $29.99. Combustor also leads on update cadence (every 2 months vs every 9 months) and device support (3 vs 1). FabFilter Pro's advantage is rating (5.0 vs 4.7) and review sentiment (100% vs 80%). 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
FabFilter Pro costs $29.99 and Combustor $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FabFilter Pro holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 16 and 19 respectively. Written reviews point the same way: 100% of FabFilter Pro's written reviews are positive against 80% of Combustor's.
FabFilter Pro ships an update every 9 months, Combustor every 2 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | FabFilter Pro | Combustor |
|---|---|---|
| Price | $29.99 | $4.99 — better |
| Rating | 5.0 (16 ratings) — better | 4.7 (19 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 16 | 19 — better |
| Update frequency | Every 9 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 14.0 |
| Further details — not scored | ||
| Size | 4 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | FabFilter | BeepStreet |
Customer experience
FabFilter Pro
Combustor
In-app purchases
FabFilter Pro
No in-app purchases
Combustor
No in-app purchases





