AU3FX vs mLFO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AU3FX
This audio effect plugin offers a versatile stereo dynamics processor with a noise gate, compressor/expander, and limiter. Achieve subtle compression, extreme pumping, or maximum loudness with its highly tweakable controls and high-quality DSP.
- Noise gate
- Compressor/expander with side-chain
- Limiter/clipper
- Negative ratio support
- External side-chain input
- Parallel compression
- Adjustable envelope followers
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A highly tweakable stereo dynamics processor with noise gate, compressor/expander with external side-chain input, and limiter/clipper. From subtle compression, extreme pumping, to maximum loudness! This app is part of the AU3FX series, a collection of simple and powerful audio unit effect plugins. • High quality 32-bit DSP engine. • Compressor/expander with optional lookahead buffer. • Allows negative ratios for pumping/cancellation effects. • Hard or soft knee with adjustable radius. • Built-in side-chain low/high cut filters with monitor toggle. • External side-chain input. • Built-in noise gate. • Brick-wall lookahead limiter. • Hard/soft clipper. • Supports "parallell compression". • RMS/Peak envelope followers with attack, release and hold time. • Switchable between Linear and Logarithmic mode. • Automatic makeup gain. • Stereo link on/off. • Comes with several bundled presets. • Use multiple instances at the same time. • Save/load session state in host. • External access and control of all parameters from host. • User presets shared across hosts (on iOS 13 and later).
mLFO
This app provides 16 programmable MIDI LFOs with extensive features for music production. It offers multiple parameters per LFO, independent output, and a wide rate range. It can be used as a standalone app or as an AUv3 plugin within compatible host applications.
- 16 programmable MIDI LFOs
- Multiple parameters per LFO
- Independent output and MIDI channel
- Wide rate range
- Custom shape creation (free and ADSR)
- 4 trigger modes including random retrigger
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*** Note *** Although mLFO can run as a stand-alone app, the recommended way to use it is as an AUv3 plugin from inside a suitable AU Host app, such as AUM, AudioBus, Cubasis etc. mLFO AUv3 is a set of 16 programmable MIDI LFOs with a extensive set of features: - Multiple parameters per LFO, including variability. - Independent output and MIDI channel per LFO. - Wide rate range, from 1/128 to 130442 beats. - 9 factory and 16 user shapes. - Custom shapes: free and ADSR. - 4 trigger modes, including random retrigger (every incoming note triggers a random LFO). - MIDI Thru. mLFO uses parts of the following copyrighted material, the use of which is hereby acknowledged. LICENCES AudioKit The MIT License (MIT) Copyright (c) 2016 Aurelius Prochazka Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Screenshots
Verdict
The clearest difference is update cadence: AU3FX at every 4 days against mLFO's every 2 months. AU3FX also leads on rating (4.7 vs 4.5) and iOS requirement (12.0 vs 15.6). mLFO's advantage is price ($5.99 vs $6.99). On review sentiment, ratings volume, ads and in-app purchases 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
AU3FX costs $6.99 and mLFO $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AU3FX holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 14 and 19 respectively. Written reviews complicate that: 75% of AU3FX's written reviews are positive against 80% of mLFO's, so the app with the better star average is not the one people write more warmly about.
AU3FX ships an update every 4 days, mLFO every 2 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.
| Parameter | AU3FX | mLFO |
|---|---|---|
| Price | $6.99 | $5.99 — better |
| Rating | 4.7 (14 ratings) — better | 4.5 (19 ratings) |
| Positive reviews | 75.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 14 | 19 — better |
| Update frequency | Every 4 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 2 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Kymatica AB | Axart Labs OU |
Customer experience
AU3FX
mLFO
In-app purchases
AU3FX
No in-app purchases
mLFO
No in-app purchases









