Comparison

M2DX vs Splitonic

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

M2DX

Create music with a powerful 6-operator FM synthesizer. Explore hand-crafted presets or import classic DX7 banks. Use the on-screen keyboard or connect MIDI controllers for a versatile music-making experience.

Highlights
  • 6-operator, 32-algorithm FM synthesis
  • On-screen keyboard with velocity control
  • DX7-format .syx bank import
  • 6-stage FX chain
  • AUv3 plug-in support
  • Native MIDI 2.0 support
Features
Read full description

M2DX is a 6-operator, 32-algorithm FM synthesizer for iPhone, built from the ground up in pure Swift 6. Open it and play immediately — tap the built-in on-screen keyboard and start making sound with M2DX's own hand-crafted presets. No external hardware or MIDI controller is required. The FM engine is a bit-exact port of the open-source Dexed / msfa DSP, verified sample-for-sample against the reference. It is also compatible with the classic DX7 patch format: bring your own DX7-format .syx banks and play them alongside M2DX's originals. KEY FEATURES - Built-in on-screen keyboard with velocity and octave control — play standalone, no hardware needed - 6-operator, 32-algorithm DX7-style FM synthesis - M2DX's own original FM presets, plus DX7-format .syx bank import (bring your own) - A 6-stage FX chain: EQ, Drive, Chorus, Reverb, Stereo, Maximizer - Low-latency audio with AVAudioSourceNode direct rendering - AUv3 plug-in — use M2DX as an Audio Unit (AUv3) in compatible hosts OPTIONAL MIDI (not required to use the app) - Connect any MIDI controller over Bluetooth or USB if you have one - Native MIDI 2.0 — UMP with 16-bit velocity and 32-bit controllers - MIDI-CI Property Exchange — patch names appear on compatible controllers (for example, KORG KeyStage) - MIDI Learn for hands-on control MIDI 2.0 done natively, classic FM done faithfully. The FM engine is built on Dexed / msfa (Apache License 2.0). M2DX is an independent product and is not affiliated with, endorsed by, or sponsored by Yamaha Corporation. DX7 and Yamaha are trademarks of Yamaha Corporation. iOS 18 or later.

About

Splitonic

This audio unit plugin for iOS and macOS splits sound into harmonic and percussive components using spectral decomposition. It's ideal for remixing when stems aren't available, offering real-time processing and adjustable filters.

Highlights
  • AUv3 Plugin for iOS & macOS
  • Spectrogram decomposition
  • Real-time processing
  • Adjustable median filter sizes
  • Configurable separation threshold
  • Three-way separation
  • Preset system
Features
Read full description

Splitonic is an AUv3 audio unit for iOS and macOS. It is a filter based on the Fourier spectrum of the input signal and can be used to split the sound in a harmonic and a percussive component. Ideal for remixing when no separate stems are available. Features: - AUv3 Plugin for iOS & macOS. - Spectrogram decomposition: Splits an audio signal into controllable pitched and transient energy layers. - Real time processing: Low-latency controllable by the user. - Kernel dimensions: Adjustable horizontal (time) and vertical (frequency) median filter sizes. - Separation threshold: Configurable threshold to trade off separation isolation against musical artifacts. - Three-Way Separation: Isolates an additional "residual" or noise component to capture background hiss, vocals, or applause. - Preset system: with factory and user presets, plus import/export. - Demo mode available: purchase to unlock full version. - Optimized layout: for portrait and landscape orientations.

Screenshots

M2DX4 screens
Splitonic4 screens

Verdict

The call

The clearest difference is rating: Splitonic at 5.0 against M2DX's 3.7. Splitonic also leads on device support (4 vs 1) and iOS requirement (15.6 vs 18.0). M2DX's advantage is update cadence (every 2 days vs every 2 weeks) and monetization model (free vs free with in-app purchases). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. M2DX sells 1 one-off in-app purchase and Splitonic sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Splitonic holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

UpkeepUpdate frequency

M2DX ships an update every 2 days, Splitonic every 2 weeks. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 5 level
M2DX versus Splitonic: the parameters behind the verdict, then further details
ParameterM2DXSplitonic
PriceFreeFree
Rating3.7 (3 ratings)5.0 (2 ratings) — better
Positive reviews25.0% of reviews—
Number of ratings3 — better2
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod, Mac — better
Requires iOS18.015.6 — better
Further details — not scored
Size16 MB10 MB
Age rating4+4+
DeveloperHakaru HiroseJan Maes

Customer experience

M2DX

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive25.0%
Neutral75.0%
Negative0.0%

Splitonic

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

M2DX

One-time1
  • M2DX Pro Unlock$9.99
1 purchases

Splitonic

One-time1
  • Splitonic Activation$4.99

Questions

Is M2DX free?
M2DX is free to download, with in-app purchases available.
Is Splitonic free?
Splitonic is free to download, with in-app purchases available.
Which has better reviews, M2DX or Splitonic?
Splitonic is rated higher. M2DX averages 3.7 out of 5 from 3 ratings, while Splitonic averages 5.0 from 2 ratings.
Do M2DX or Splitonic have ads?
Neither M2DX nor Splitonic shows ads.
Which is updated more often, M2DX or Splitonic?
M2DX ships an update every 2 days, and Splitonic every 2 weeks. Most recently, M2DX was updated on October 8, 2026 and Splitonic on October 11, 2026.

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