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
Metronome Pro for Apple Watch
Metronome Pro for Apple Watch – The Metronome on Your Wrist
$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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
Preview a sample Build Kit No email needed
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.
// RORK SYSTEM PROMPT
Rork plan preview for Metronome Pro for Apple Watch: 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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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.
Hypothesis 1
Provide a wider range of sound choices and visual customization.
Assumption to check: Limited customization options for sounds and visuals
Validate with people who use this workflow before building.
Hypothesis 2
Implement sharing options for users to share their custom settings.
Assumption to check: No social features for sharing metronome settings
Validate with people who use this workflow before building.
Hypothesis 3
Enable offline access to metronome features without an internet connection.
Assumption to check: No offline functionality
Validate with people who use this workflow before building.
Hypothesis 4
Enhance UI with themes and animations to appeal to a broader audience.
Assumption to check: Basic user interface may not engage users
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Metronome Pro for Apple Watch – The Metronome on Your Wrist The ultimate professional metronome app for Apple Watch – always with you, right on your wrist. With Metronome Pro, you get a powerful metronome for musicians designed to make your music practice easier, smarter, and more precise. Thanks to haptic feedback directly on your wrist, you can feel the beat instead of only hearing it – perfect for drummers, guitarists, pianists, and all musicians who want to stay in time anywhere. Features • Precise metronome on Apple Watch with adjustable BPM (beats per minute) from slow to ultra-fast tempos. • Support for any time signatures – practice in 2/4, 3/4, 4/4, 6/8, and more. • Haptic metronome feedback – feel the tempo without needing sound. • Ideal for guitar practice, piano exercises, drumming, violin, bass, or any instrument. • Tap Tempo function – set your tempo instantly by tapping. • Minimal, clean design made for quick access during practice or live sessions. • Metronome app synced with your smartwatch – always available, even without your iPhone. Why Metronome Pro? Unlike classic metronome apps, Metronome Pro gives you instant feedback through your Apple Watch vibration. No distractions, no need to keep your phone nearby. Just raise your wrist and start practicing. Whether you’re a beginner musician learning to play in time, or a professional performer needing a reliable tempo trainer, Metronome Pro is the best metronome for Apple Watch to keep your rhythm tight. For a better experience, set the Haptics to Prominent in your Apple Watch settings: Watch → Sounds & Haptics → Haptics: Prominent
Written user reviews are not shown here. Check current App Store reviews >
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
React Native
Expo
expo-av
react-navigation
shadcn/ui
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.
