ARC-24 app icon

Groovebox

For iPhone & iPad

Multitrack synth, sampler, drum machine, and looper.

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ARC-24 on iPad
ARC-24 on iPhone
Play In Key
Every note and chord stays in your chosen scale. Explore freely without getting lost.
Layer Loops
Eight tracks for synths, samples, and multiple drum kits at once. Record and overdub while the loop keeps moving.
Synth Sound Design
Shape each synth with dual oscillators, envelope, filter, motion, and a full effects rack. Browse built-in Recipes or save your own.
Sampler
A 4×4 pad grid of your own audio on any track. Import or record from the mic, play one-shots or pitched Keys, chop loops into new pads, and overdub into the loop like Notes.
Drums
Load a kit on any track and layer as many drum machines as you need. Full EQ and FX on every drum track, just like synths and samples.
Song Mode
Build multiple loops and arrange them into a full song. Jump between loop scenes live while you perform.
Pulse & Arpeggiator
Repeat notes and hits with Pulse, or latch curated ARP patterns on synth tracks. Keep phrases locked to the tempo when the transport is running.
Edit & Tighten
Quantize and humanize per track, then open the grid editor to move, resize, and delete recorded notes, chords, drums, and samples.
Save & Sync
Save as many songs as you like. Everything syncs through iCloud between iPhone and iPad. Export as WAV or AAC when a moment is worth keeping.
Built For Performance
Notes, Chords, Drums, and Sampler up front, with mixer, FX, and sound design always a tap away. Optional MIDI input for external controllers.

Built By One Person.

ARC-24 isn't backed by a large company.

It's designed and developed by a single independent creator who wanted a simpler groovebox for layering synths, samples, drums, drone, and loops on iPhone and iPad.