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
Song Bingo
custom apple music playlists tailored for bingo can easily be created in the app
$2.99 · In-app purchases
PRICE
$2.99
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/
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 Song Bingo: 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
Offer regular updates or user-generated content to keep the game fresh.
Assumption to check: Limited song selection can lead to repetitive gameplay.
Validate with people who use this workflow before building.
Hypothesis 2
Implement social sharing options for users to share scores on social media.
Assumption to check: Potential lack of social features for sharing results.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a fair pricing model that offers value for money.
Assumption to check: In-app purchases may frustrate users if not balanced well.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear explanations and tutorials for each difficulty setting.
Assumption to check: Difficulty levels might not be intuitive for all 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
custom apple music playlists tailored for bingo can easily be created in the app. songs for the playlist are added based on your choice from apple music's own playlists or albums, which can be selected either by genre or by searching for your preferred music. the host plays the playlist (the host must have an active apple music subscription) via their preferred playback method (tv, bluetooth speaker, etc.), while participants present in the same location race to match the songs and their numbers on their bingo cards. this is a physical game where participants must gather with the host to hear the music being played. players can participate digitally using game center in the app or with printed bingo cards and song lists, which can easily be generated in the app. the host can even join the fun as a participant! song bingo is perfect for parties, family gatherings, or just having fun with music. gather your friends, play the music, and let the bingo fun begin!
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
Supabase
TypeScript
React Navigation
Zustand
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.
