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
Worship and Praise Lyrics
Worship and Praise Lyrics is brought to you by Eznetsoft /SamJocelyn
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
277 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included18 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.
// RORK SYSTEM PROMPT
Rork plan preview for Worship and Praise Lyrics: 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
Generous offline download limits
Assumption to check: Can't play offline
Validate with people who use this workflow before building.
Hypothesis 2
Better personalization with explicit feedback
Assumption to check: Algorithm doesn't understand taste
Validate with people who use this workflow before building.
Hypothesis 3
Limited on-demand plays for free users
Assumption to check: Shuffle-only on free tier
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
Worship and Praise Lyrics is brought to you by Eznetsoft /SamJocelyn. It is a dedication to our Lord and Savior Jesus-Christ. This App is brought to the Christian community to help them Worship using the standard hymns. More than 4,700 Great Songs and music for your daily Worship. All Users can now enjoy the Worship Player that is included. Books included in this release: Contemporary and Traditional Songs (English, Spanol, and French) Christian Hymns, Hymns for Seventh Day Adventists Chants D'Esperance (Francais/Creole); Melodie Joyeuse (Francais/Creole) Reveillons-Nous (Francais/Creole) Echo Des Elus - Haiti Chante Avec Radio Lumiere We are so happy to bring this wonderful App to you. This is our hope that this will facilitate your worship to the Lord. We have tried our best to bring most of all the public domain traditional songs to you. The songs are in English, French and Creole divided in Books. We hope that you will enjoy this version and any future versions to come. Features Worth mentioning: -Offline access to hundreds of the Traditional Songs (English, Spanish, French and Creole) - Global search of thousands of hymns through all the books. -Add to Favorites: You can select individual songs you like and add them to your Favorites List. -Search Songs by Title -Email of Song Lyric to yourself. You can take advantage of our growing database to email Lyrics to yourself right from our App. We appreciate your feedback. Please email [email protected] for any concerns before posting a bad review. Subscribe to our Facebook page, and receive news about the App.
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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
React Native
Expo AV
Supabase
RevenueCat
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.
