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.
ihapiNES — Hardware roots
$2.99
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.
Your first Build Kit is free with a verified email.
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.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
ihapiNES — Hardware roots. Pocket chiptunes. Built upon the original battery-powered Twisted Electrons hapiNES, ihapiNES brings the little hardware groovebox to your iPhone—built directly from its original firmware, with its distinctive chip sound and hands-on sequencing intact. Its sound engine draws on a realistic NES emulation core for more authentic triangle and pulse tones, bringing extra detail and character to that unmistakable NES sound. Triangle bass, two square-wave voices and a punchy drum track come together in a pocket-sized playground for melody and rhythm. Shape your sound with arpeggios, pulse-width tweaks and vibrato, then bring it to life with slides, swing and playful performance effects. Start with 16 factory grooves, from spacious melodies to busy chip jams. Write each track step by step, record notes live, or chain patterns and key changes into evolving arrangements. Build a beat, find a bassline and let the little square waves sing. Play standalone or load ihapiNES as an AUv3 instrument in your favourite host. Each plugin instance keeps its own patterns and sound settings, with optional host transport following and independent Run control. • Four tracks: triangle bass, two square voices and drums • 16 editable patterns with slides, swing and live recording • Pattern chaining and recorded key changes • Arpeggios, vibrato, pulse-width control and performance effects • Kick drums, snares, hats, toms, crashes and quirky effects • MIDI input: play the selected track or address each voice separately • Standalone app and AUv3 instrument, designed exclusively for iPhone • Floating-point mixing with extra headroom and warm volume-knob saturation • Tactile haptic feedback in standalone mode • Ableton Link for jamming with apps and devices on the same network • Life slider for live rhythmic variations without rewriting your patterns • Illustrated playing guide and printable cheat sheet Your little chip music machine—reborn for iPhone.
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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.
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.
Not assessed in a Build Kit yet.
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.