Sparse Neural FX Modeler vs milliVerb
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sparse Neural FX Modeler
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Plug in and play through real amplifiers, captured with neural networks and reproduced live on your iPhone. Amber Neural FX Modeler models the sound of tube amps sample by sample. Pick from 25 captures — chiming Vox, clean Fender, cranked Deluxe Reverb, vintage fuzz — and play them in real time with latency low enough to feel like the amp is in the room. THE PEDALBOARD Twenty blocks you arrange in any order: up to four neural amps in one chain, drive, tape echo with wow and flutter, shimmer reverb, compressor, gate, wah, phaser, flanger, chorus, tremolo, EQ, octave, delay, and a convolution reverb. Drag blocks to reorder the signal path. Save and load your rigs as presets. RECORD YOUR TAKES One tap records both a dry and a processed track straight into the Files app. BUILT ON RESEARCH The engine comes from a published paper on efficient real-time neural amp modeling — the same models, running entirely on your device. No ads. No accounts. No data collected. Plug in a guitar through any audio interface, or just use the mic. Capture names identify the amplifiers the models were measured from; no affiliation or endorsement is implied.
milliVerb
Transform your iPhone or iPad into a professional reverb processor for live audio. Shape rich algorithmic spaces in real-time, visualize your reverb with a spectral display, and control parameters with MIDI. Ideal for musicians and vocalists seeking immersive sound.
- Real-time reverb shaping
- Spectral display visualization
- MIDI control and tempo sync
- Live audio processing
- Feedback cancellation
- Customizable presets
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Carry the venue in your pocket. milliVerb turns your iPhone or iPad into a responsive, performance-ready reverb processor for musicians, vocalists, and sound explorers. Send live microphone audio through rich, fully wet algorithmic spaces that you can shape while you perform. DESIGNED TO BE PLAYED • Shape size, decay time, pre-delay, diffusion, damping, tone, and filtering in real time • Explore studio rooms, chambers, concert halls, churches, and expansive atmospheric spaces • Sculpt low-, mid-, and high-frequency decay directly over the live spectrum • Add movement using multiple modulation styles, adjustable depth and rate, tempo sync, or incoming MIDI clock • Use envelope and ducking controls to make the reverb respond dynamically to your performance • Control parameters and step through presets using MIDI CC and compatible foot controllers • Unlock custom presets, favorites, and performance sets with the full version . SEE YOUR REVERB The real-time spectral display provides an animated view of the processed reverb tail. Turn your device sideways for an expanded panoramic visualization, or use the interactive decay-band editor to shape frequency-dependent reverb behavior directly over the spectrum. BUILT FOR LIVE SOUND Keep input, output, and the live spectrum visible while you perform. Input compression helps manage incoming dynamics, while Apple Voice AEC, advanced adaptive feedback cancellation, optional dynamic protection, and venue calibration help reduce feedback in challenging acoustic environments. MADE FOR CONTINUOUS USE The full version can keep milliVerb processing during rehearsals and performances with optional background and locked-screen audio. You can also prevent the screen from automatically locking while the reverb is running. TRY IT FREE Practice with milliVerb in free 60-second audition sessions. A one-time in-app purchase unlocks uninterrupted live processing, background audio, custom presets, favorites, and performance sets.
Screenshots
Verdict
The clearest difference is in-app purchases: Sparse Neural FX Modeler at none against milliVerb's 1. On price, ads, device support and iOS requirement 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. milliVerb sells 1 one-off in-app purchase. Sparse Neural FX Modeler asks for nothing beyond the download.
| Parameter | Sparse Neural FX Modeler | milliVerb |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Eli Silverstein | Angelo Milli |
In-app purchases
Sparse Neural FX Modeler
No in-app purchases
milliVerb
- milliVerb Full$7.99





