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.
App Overview
Chromatic Tuner Pro for Watch
Forget fumbling for your phone or carrying bulky equipment
$1.99
PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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A product spec, screen plans, and build steps for your coding agent.
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What's included
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Forget fumbling for your phone or carrying bulky equipment. Tuner Pro transforms your Apple Watch into a precise, professional-grade chromatic tuner that is always with you. Designed specifically for watchOS, Tuner Pro uses the microphone on your wrist to detect pitch with incredible accuracy, making it perfect for quick tune-ups during rehearsals, gigs, or practice sessions. KEY FEATURES: - Wrist-First Design: Optimized interface for the Apple Watch screen. Clear, high-contrast visuals make it easy to read in low light or on stage. - Chromatic Precision: Accurately detects any note. Perfect for alternate tunings. - Works Standalone: No iPhone connection needed. Tune anywhere, anytime. - Mute Microphone: Mute microphone with just one tap when tuning is not needed. - Adjust Sensitivity: Turn the crown to adjust mic sensitivity (input volume). - Concert Pitch: Set A4 anywhere from 415 to 466 Hz, including 442 Hz for orchestral tuning. Your choice is remembered. - Haptic Feedback: Feel the click on your wrist when you are perfectly in tune (ideal for noisy environments). - Battery Efficient: Lightweight engine designed to minimize battery usage. SUPPORTED INSTRUMENTS: Works perfectly with acoustic and electric guitars, bass, ukulele, violin, cello, viola, banjo, mandolin, and wind instruments. WHY TUNER PRO? Whether you are a beginner learning your first chords or a professional on tour, having a tuner literally attached to you changes the game. Stop searching for your clip-on tuner. Just raise your wrist and play. Download Tuner Pro today and never play out of tune again.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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.
Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
BUILD KIT DIFFICULTY
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.
