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
TAP PAL: Tempo Trainer
TAP PAL helps musicians find a tempo, practice steady timing, and improve their internal pulse.
$4.99
PRICE
$4.99
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 files
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
TAP PAL helps musicians find a tempo, practice steady timing, and improve their internal pulse. FIND A TEMPO Tap the red button and TAP PAL calculates the tempo in beats per minute. The display updates as you continue tapping. TRAIN YOUR TIMING Choose a target tempo and meter, then practice with or without the metronome. Visual feedback shows whether you are rushing, dragging, or approaching the target. METRONOME Practice with a visual and audible metronome, multiple click sounds, adjustable volume, and common meters including 4/4, 3/4, 6/8, 7/8, 2/4, 5/4, and 12/8. MICROPHONE TEMPO DETECTION Use your device microphone to estimate the tempo of claps, percussion, and other clear rhythmic sounds. Microphone audio is processed on the device and is not uploaded or collected. PERFECT TEMPO CERTIFICATES Maintain accurate timing to earn a TAP PAL certificate that you can view, zoom, and save to Photos. TAP PAL includes a Quick Guide and User Manual and is designed for both iPhone and iPad. TAP PAL is also available for macOS as a standalone application and in VST3, AU, and AAX plug-in formats. Learn more at SoundPal.net
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Screenshots
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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
Intermediate
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.
