Arc & Decay vs Skiffy

Arc & Decay is a plasma arc distortion instrument for iOS, built on the physics of real xenon gas tube breakdown. Feed it any sound through the built-in microphone and it fires an electrical arc when your signal crosses the ionization threshold. The arc saturates and distorts with odd harmonics, crackles through marginal-zone sputter, and holds a long ionization tail that decays into electrical noise long after your sound stops. Six precision encoders control every dimension of the arc character: Voltage drives the current into the gap. Ignition sets the threshold. Instability introduces chaos and arc wander. Fizzle and Spark shape the crackle density and tail length. Mix blends dry signal with pure arc output. Reverb and delay extend the electrical space without losing the character. Record up to one minute of output and share directly from the app. Arc & Decay is not a guitar pedal. It is not a synthesizer. It is a plasma arc instrument that runs on whatever sound you give it. © 2026 Synthetic Pulse Industries.

Skiffy is a simple, focused Eurorack case designer for iPhone, iPad, and Mac. Browse modules, build a collection, and lay out your rack to scale. BROWSE • A large, growing catalog spanning many manufacturers, with real faceplate art and specs, cached for offline use • Search that ignores accents and word order; filter by function (VCO, VCF, VCA, LFO, sequencer, effect, and more) and by 3U or 1U format; sort by name, manufacturer, or HP COLLECTION • Track the modules you own and the ones on your wishlist, and pick your preferred faceplate variant • Add custom modules with your own faceplate photo and a crop-to-fit editor RACKS • Multi-row cases with a typed HP width and the 3U and 1U rows you choose • A to-scale canvas on a single HP grid, so 1U and 3U rows line up exactly. Pinch or scroll-wheel to zoom, pan, and fit to screen • Drag a module into a slot, rearrange by dropping it beside others (neighbours slide aside), or set it aside outside the case, with snapping and haptics • A searchable module picker that only offers modules that fit the tapped slot • Live metrics: HP used, +12V / −12V / +5V draw against your budget, module count, total value, and maximum depth, plus a full stats sheet EVERYWHERE • One app for iPhone, iPad, and Mac, with native macOS forms and keyboard and trackpad support • Your racks, collection, and custom modules sync through your own iCloud account, and everything works offline • Free, with no account, no ads, and no tracking. The catalog is anonymous and your data stays in your iCloud