# Phase Modulator vs REXS

Phase Modulator and REXS are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Phase Modulator costs $1.99 and REXS $2.00 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Phase Modulator against 5.0 for REXS. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Phase Modulator | REXS |
| --- | --- | --- |
| Price | **$1.99** | $2.00 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/phase-modulator/id6780734729/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rexs-exs24-to-sf2/id6789291199/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | Paid | Paid |
| Size | 8 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Callback Audio, LLC](https://appshunter.io/developer/1896220942) | [Rubens Felicio](https://appshunter.io/developer/6775565794) |

## What reviewers say

### Phase Modulator

[App page](https://appshunter.io/ios/app/phase-modulator/id6780734729)

This app generates complex audio textures and tones by manipulating the phase of a carrier oscillator with a modulating signal. It offers two distinct modes: internal oscillator-to-oscillator modulation or using your audio input as the modulation source. Explore a wide range of sonic possibilities from shimmering harmonics to dense, inharmonic spectra.

**Highlights:** Phase modulation synthesis, Internal carrier and modulator oscillators, Audio input as modulation source, Adjustable carrier and modulator frequencies, Modulation index control, Selectable oscillator waveforms, Amplitude tracking of input audio

**Features:** Vision Pro support

**In-app purchases:** none


### REXS

[App page](https://appshunter.io/ios/app/rexs-exs24-to-sf2/id6789291199)

This app converts your Logic EXS24 instrument libraries into SoundFont (.sf2) files, making them accessible on any device. It preserves all instrument details and allows for on-device editing and bank creation, with no cloud uploads or subscriptions.

**Highlights:** Convert EXS24 to SF2, Finds audio samples automatically, Build themed instrument banks, Edit and preview presets, AUv3 plugin for DAWs, 100% on-device processing, Universal app for iOS and Mac

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Phase Modulator free?

Phase Modulator costs $1.99, with no in-app purchases.

### Is REXS free?

REXS costs $2.00, with no in-app purchases.

### Which has better reviews, Phase Modulator or REXS?

Phase Modulator and REXS are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Phase Modulator or REXS have ads?

Neither Phase Modulator nor REXS shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*