MIDI FX vs Cab ML
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MIDI FX
This app allows you to control and process MIDI signals for music creation. It offers features like harmonization, transposition, and sequencing, enabling you to control external or virtual synthesizers and create complex musical arrangements.
- MIDI signal processing
- Harmonize and Transpose
- Sequencer for synths
- Delay and Looper
- Filter notes by velocity
- Internal instruments
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Buy once and get the iOS and Mac apps (with Family Sharing) Control your MIDI signals and process them in any combination of ways: Harmonize, Transpose, Arpeggiate, etc... Or use the Sequencer to play any external or virtual synth. Use a MIDI interface to unlock the power of the app to control multiple synths with one keyboard, play one note and generate chords, basslines, etc... Use the delay/looper or filter notes based on velocity or other parameters to send to different synths/effects. A MIDI workstation in your pocket (or your iPad/Mac) You can also use some internal instruments (drums sampler, piano or synth) if you are away from your MIDI gear, and sequence whole songs inside the app, or use other synth apps as input/output for MIDI FX. Your imagination is the limit!
Cab ML
This app generates custom impulse responses using a neural network, allowing interactive sound shaping. It also includes a poweramp and microphone reverb generator for further audio manipulation.
- Neural network impulse response generation
- Interactive tag-based sound shaping
- Poweramp with multiple options
- Microphone reverb generator
- AUv3 plugin support
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Cab ML is both a standalone app and an AUv3 plugin that provides a neural network for impulse response generation. By moving tags in a window you can change the impulse response in an interactive way. Underlying a neural network will generate an impulse response based on the position of the tags. Instead of trying out all your impulse response files through a classic impulse response loader, you can now find the right sound interactively by moving the marks until you like what you hear. Furthermore Cab ML also provides a poweramp with many options and a microphone reverb generator. The free version allows you to test Cab ML completely, but every minute the plugin will be silent for 3 seconds. To remove these limits there is a one time in-app purchase. You need an audio interface to connect your instrument to your Mac. Known audio interface brands for guitar or bass are for instance Focusrite or iRig. If you don't have an audio interface, you can use the AUv3 plugin in a DAW such as GarageBand or Logic Pro. Any (guitar/bass) sound you have recorded can be fed through the Cab ML audio unit.
Screenshots
Verdict
The clearest difference is rating: MIDI FX at 5.0 against Cab ML's 4.0. MIDI FX also leads on monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence 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
Both are free to download. MIDI FX sells 1 one-off in-app purchase and Cab ML sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
MIDI FX holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 4 respectively.
MIDI FX ships an update every 9 days, Cab ML every 3 weeks. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.
| Parameter | MIDI FX | Cab ML |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 4 | 4 |
| Update frequency | Every 9 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Requires iOS | 14.7 | 14.0 — better |
| Further details — not scored | ||
| Size | 263 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Jorge Arroyo | Jan Maes |
Customer experience
MIDI FX
Cab ML
In-app purchases
MIDI FX
- Unlock app$9.99
Cab ML
- Cab ML Activation$11.99









