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.
Great ears aren't a gift — they're a habit
$7.99 · 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 BassEducation Ear Trainer: 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 exercise variety and difficulty levels
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social features for sharing progress
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of personalized training plans
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline access to exercises
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.
Great ears aren't a gift — they're a habit. BE Ear Trainer builds yours a few minutes at a time. Open the app, hit Play, and start naming what you hear. No setup, no theory lecture — just sound, your answer, and instant feedback. Four ways to train: name the distance between two notes (Intervals), the color of a chord — major, minor, sevenths (Chord Quality), the mood of a scale, like Dorian or Mixolydian (Modal Color), or where a note sits in the key (Scale Degrees, with numbers or solfège). Questions play on a warm, real sampled piano — clear, musical reference tones, not synth beeps. And when you just want to explore, switch to Free Play: a no-quiz reference mode. Pick Intervals or Chords, tap any one to hear it from any root, and read a quick theory card — the actual notes, the spelling, and where it turns up in real music. It's the perfect warm-up before you test, or a fast way to check a sound. Difficulty grows with you: start with a handful of answers and unlock more as you level up. A built-in coach gives hands-on tips for every mode, and two printable cheat-sheets — a practice field guide and a theory reference (modes, chords, and how they're built) — are yours to save or share as a PDF. Your streaks and stats stick around, so you can watch the habit pay off. Built by a touring bassist and educator who uses this exact practice to keep his ears on the bandstand.
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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.