Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
Samposium is a performance sampler built for real-time audio manipulation
$14.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Performance Sampler: Samposium: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Difficulty in managing large sample libraries
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited customization for samples
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent audio playback quality
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Complex navigation between features
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Samposium is a performance sampler built for real-time audio manipulation. Through fluid, multi-touch gestures inspired by modular synthesizers and the spirit of improvisation, you bend, shape, twist, and sculpt samples into rich, textured arrangements — sample putty you mold live, not just trigger. Whether you're playing live, jamming on the go, or exploring new sounds, Samposium turns your iPad or iPhone into an interactive musical instrument, welcoming to complete beginners and seasoned musicians alike. New in this release: Sequences just leveled up into Patterns. Build and edit up to 8 patterns (A–H) live, without ever stopping playback, so a simple loop can grow into a full arrangement without you ever losing the moment. Grab a Bluetooth MIDI controller and take hands-on control — every mapping in your project now lives in one screen, so you always know exactly what's wired to what. Professional beat-making and sound design at your fingertips • Create fully customizable sample pads - adjust colors, sizes, positions, and behaviors to match your style • Design unique sounds with independent effects chains on every pad, complete with 3-band EQ, tuning, and full effect order control • Layer drums realistically with choke groups, mute or solo any pad at a glance, and craft intricate beats with a powerful 64-step sequencer, up to 512 unique steps • Instantly clear every mute or solo with one tap when things get chaotic mid-set • Tap anywhere on a waveform to hear that exact moment instantly, even while the sequencer keeps running Record and capture your sound • Connect a USB audio interface and choose exactly which input channel feeds which pad, with mono/stereo recording and channel metering • Record your own samples or layer in royalty-free sounds with live Mic/Line In recording and resampling • Bundled project demos and 300+ MB of royalty-free samples to spark creativity immediately Make music your way, anywhere • Adaptive interface that flows seamlessly between portrait and landscape orientations • Choose from multiple layouts designed for different workflows - prioritize what matters to you • Show or hide views to keep your focus exactly where it needs to be • Fully customizable colors and colorblind-friendly options with light and dark modes Collaborate and create without limits • Sync seamlessly with other music apps and hardware using Ableton Link • Full MIDI control with visual feedback - map every pad, effect, and sequencer action with "push to learn," using wired or Bluetooth MIDI controllers • Per-pad MIDI settings for advanced production control • Get quick inspiration with intelligent randomization that respects your settings Stay in the creative flow • Quick-save and auto-save so your ideas are never lost, plus quick access to your 5 most recent projects • Intuitive multi-touch gestures and controls designed for fast, expressive playing • Effect range controls and step-size quantization for precise sound sculpting Everything you need, nothing you don't • One purchase, no subscriptions - create forever • Comprehensive user guide to master every feature • Works as a standalone app or as an AUv3 plugin, with full audio recording support • Run multiple instances of Samposium side-by-side inside your DAW What people are saying: "I'm always excited about any new, powerful multi-layer sampler for iOS. In this, I really like how fluid the interface and workflow are here." - Synth Anatomy "It's for music creation with your samples and it's for live jamming and it does all kinds of cool stuff. It's very elegant with the way it's been designed." - The Sound Test Room "It's fun, it is a performance sampler. There are no in-app purchases with this, you pay for it once! It works on your iPhone, it works on your iPad" - JadeStarr Questions? [email protected] Join our community on Discord https://www.synthfamdsp.com/#community
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.