Splitonic vs FOLD Stereo to Mono
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- AUv3 Plugin for iOS & macOS
- Spectrogram decomposition
- Real-time processing
- Adjustable median filter sizes
- Configurable separation threshold
- Three-way separation
- Preset system
Read full descriptionHide 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.
FOLD Stereo to Mono
This audio utility app allows musicians to adjust stereo width and fold down stereo signals to mono. It functions as an AUv3 plugin for compatible hosts, offering real-time phase correlation metering and output gain control. It's designed for seamless integration into music production workflows.
- Variable stereo width control
- Click-free mono fold-down
- Output trim gain stage
- Real-time phase correlation meter
- AUv3 plugin support
- Host automation compatibility
Read full descriptionHide full description
FOLD is a stereo width and mono fold-down utility for iOS. Use it as an AUv3 plugin in any compatible host. FEATURES Width — Continuously variable stereo width from mono to full stereo. Drag the knob or tap to enter an exact value. Width changes are smoothed to avoid clicks. Mono — One tap collapses your stereo signal to mono with a click-free ramp. Instantly check how your mix translates to a single speaker, earbuds, or phone. Output Trim — ±12 dB gain stage after the width processing. Compensate for any perceived loudness shift when narrowing a wide mix. Phase Correlation Meter — Real-time bar display with a numeric readout. Green means your signal is mono-compatible and safe. Amber indicates partial cancellation. Red flags phase cancellation issues that will cause problems on mono playback devices. WORKS AS AN AUv3 PLUGIN Load FOLD in Loopy Pro, GarageBand, AUM, Audiobus, Cubasis, n-Track, or any AU-compatible host on iPhone or iPad. The AUv3 extension exposes all parameters for host automation. Free. No in-app purchases. No ads. No account required.
Screenshots
Verdict
The clearest difference is in-app purchases: FOLD Stereo to Mono at none against Splitonic's 1. FOLD Stereo to Mono also leads on iOS requirement (13.0 vs 15.6). On price, rating, ratings volume and update cadence 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. Splitonic sells 1 one-off in-app purchase. FOLD Stereo to Mono asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Splitonic against 5.0 for FOLD Stereo to Mono. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Splitonic ships an update every 2 weeks, FOLD Stereo to Mono fortnightly. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.
| Parameter | Splitonic | FOLD Stereo to Mono |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 weeks — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 11 MB |
| Age rating | +4 | 4+ |
| Developer | Jan Maes | Shelbybark LLC |
In-app purchases
Splitonic
- Splitonic Activation$4.99
FOLD Stereo to Mono
No in-app purchases
