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.
Pano Tuner listens, finds your pitch, and shows you exactly how far you are — sharp or flat — clearly enough to trust
$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 Pano Tuner – Chromatic Tuner: 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 tuning options for different instruments
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Calibration can be tricky for some users
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Audio input may not be accurate on all devices
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface may feel cluttered for new users
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.
Pano Tuner listens, finds your pitch, and shows you exactly how far you are — sharp or flat — clearly enough to trust. Simple to open, accurate enough to rely on, and a favorite of players and teachers for years. One precision engine, almost any instrument. From the lowest bass string to the top of a piccolo or harp, Pano Tuner tracks the note the instant you play — and shows both the note and its exact frequency, in hertz and cents. MADE FOR REAL MUSICIANS • Fast, sensitive, accurate — reacts immediately and holds steady. • Tune almost anything — guitar, bass, ukulele, violin, viola, cello, harp, brass, woodwinds, voice, and folk & world instruments. • Match your ensemble — set concert-A (e.g. A=442) to your group or a historical pitch. • Read notes your way — A B C, Do Re Mi, fixed-Do, German H, and more. • A clear, readable meter and a clean, distraction-free design. BEYOND EQUAL TEMPERAMENT Most tuners know only one tuning. Pano Tuner includes nine historical and microtonal temperaments — Equal, Pythagorean, Just, quarter-/third-/sixth-comma meantone, Kirnberger III, Vallotti, and Werckmeister III — and lets you create and save your own. Made for harpsichord, organ, early music, and anyone tuning beyond the modern standard. ALSO • Play a clean reference tone for any note. • Adjustable tolerance, so "in tune" means what you need it to mean. No ads. Every feature unlocked.
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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.