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.
Tapko is a fast, no-nonsense drum sampler built by a musician for musicians
$2.99 · 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 Tapko: 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: Limited music discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor offline support
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No lyrics sync feature
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.
Tapko is a fast, no-nonsense drum sampler built by a musician for musicians. Load your sounds, build your kit, and play — standalone or as an AUv3 plugin in your favourite host. 16 PADS, TOTAL CONTROL • 16-pad grid with per-pad sample import (WAV, AIFF, MP3, M4A, FLAC, CAF) • Per-pad 3-band EQ, volume, pan, choke groups, and configurable fade out • Swipe pads to tweak volume, EQ, pan, and reverb send on the fly • Built-in stereo reverb with per-pad send and global room/decay controls ADVANCED SAMPLING • Velocity layers — up to 5 layers per pad with adjustable velocity ranges • Round robin — cycle through up to 5 samples per pad (sequential or random) • Sample trimming with a visual waveform editor • Global media browser — import clips once, assign to any pad in any kit KITS & SHARING • Create, rename, duplicate, and delete kits • Import and export kits as .tapkokit files • Kit Store — browse and download free community kits. • Full backup and restore of all kits and media to a single .tapkobackup file • iCloud sync keeps kits and your media library in sync across devices • Build kits on your computer at tapko.davidguva.se MIDI & HOST INTEGRATION • MIDI input with customizable note mapping (GM drum layout by default) • MIDI output and Program Change for kit switching • All parameters exposed to the host for automation • Factory presets support BUILT FOR PERFORMANCE • Real-time C++ DSP engine with vDSP acceleration • 16-voice polyphonic playback with intelligent voice stealing • Minimal CPU usage — designed to run alongside other plugins STANDALONE & PLUGIN Tapko works as a standalone drum machine right out of the box. It also registers as an AUv3 instrument plugin so any compatible host can load it.
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.