# REXS — EXS24 to SF2 — Your EXS24 library, anywhere

> Your EXS24 library, anywhere (iPhone/iPad app by Rubens Felicio.)

- Source: https://appshunter.io/ios/app/rexs-exs24-to-sf2/id6789291199 (this page in markdown: same URL + `.md`)
- Developer: [Rubens Felicio](https://appshunter.io/developer/6775565794)
- Category: Music, Entertainment
- Price: $2.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, Chinese (Simplified, China), European Spanish
- Released: 2026-07-16
- Data updated: 2026-08-07
- User reviews in markdown: https://appshunter.io/ios/app/rexs-exs24-to-sf2/id6789291199/reviews.md

## What is REXS?

Is your EXS24 library locked inside Logic?

Years of collected instruments — factory banks, purchased libraries, your own patches — and all of it only opens on a Mac with Logic installed. On your iPad, on stage, at a friend's studio: unreachable.

REXS sets that library free.

HOW IT WORKS

• CONVERT IN ONE DRAG
Drag an .exs file (or a whole folder) into the app. REXS reads the instrument, finds its audio files and writes a faithful SoundFont (.sf2) — zones, key ranges, velocity splits, loops, envelopes, tuning. Your original file is never touched.

• IT FINDS THE SAMPLES BY ITSELF
EXS24 instruments reference external audio that drifts around over the years. REXS searches the instrument's folder, its neighbors and the whole tree — and if something is still missing, it asks you to point at the folder and resolves the rest. WAV, AIFF and CAF (including ALAC).

• BUILD THEMED BANKS
Combine instruments from any number of sources into a single .sf2: check, drag to reorder, rename, generate. "My favorite pads" in one file, ready for any sampler.

• EDIT THE SOUND AND HEAR IT INSTANTLY
Adjust each preset's volume, pan, tuning, attack, release and filter with the built-in player: play the on-screen keyboard or connect your MIDI controller. Stack presets as layers and balance the mix.

• AUv3 PLUG-IN IN YOUR DAW
Converted instruments show up directly in AUM, GarageBand, Logic, Cubasis and any AUv3 host — nothing to export.

WHY REXS IS DIFFERENT

• 100% ON YOUR DEVICE
No cloud upload. No account. No cookies. No trackers. Your libraries (many of which you PAID for) never leave your iPhone, iPad or Mac.

• YOUR ORIGINALS ARE SACRED
REXS never modifies or deletes your files. Conversion creates new files; your .exs and audio stay exactly where they were.

• ONE-TIME PURCHASE, NO SURPRISES
No subscription, no in-app purchase, no "pro" tier. What you buy is the entire app.

• UNIVERSAL
A single app for iPhone, iPad AND Mac. Buy on any device, install on the others for free.

WHO IT'S FOR

• Live keyboard players using an iPad on stage
• Producers who switched machines and "lost" their library
• Anyone who moved away from Logic and wants their sounds back
• Sound designers recombining banks
• Beatmakers digging through vintage instruments

ABOUT THE FORMATS

EXS24 is the format of Logic's sampler (now "Sampler"), used by thousands of commercial and free libraries since 1999. SoundFont 2 (.sf2) is an open standard from 1995, alive in hardware samplers, plug-ins and mobile apps. REXS reads the former and writes the latter respecting 100% of the spec.

GET STARTED

Drag an .exs in (or tap "Add EXS24 files" and point at a folder). Check the presets, name it, generate. That's it.

Your instruments, anywhere.

—
EXS24, Logic and GarageBand are trademarks of Apple Inc. REXS is an independent product compatible with files in the EXS24 format, and is not affiliated with or endorsed by Apple.


## Version history (last 3 releases)

### 1.0.2 — 2026-07-19

Samples not found: the alert now shows WHICH audio files the instrument is looking for, not just the instrument's name.

### 1.0.1 — 2026-07-18

Expansion in language settings

### 1.0 — 2026-07-16

No release notes.

## More apps by Rubens Felicio

- [RSF2 — SF2 Manager - AUv3](https://appshunter.io/ios/app/rsf2-sf2-manager-auv3/id6775565792)
- [RDX - FM Manager - AUv3](https://appshunter.io/ios/app/rdx-fm-manager-auv3/id6783084652)
- [Tonic Synth — AUv3](https://appshunter.io/ios/app/tonic-synth-auv3/id6783345229)
- [Tonic FX — Multi-Effects](https://appshunter.io/ios/app/tonic-fx-multi-effects/id6792166457)

All apps by Rubens Felicio: https://appshunter.io/developer/6775565794

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*