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
NKJV Bible (Audio & Book)
The New King James Version of the Bible
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
392 ratings · Top 30%
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 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 NKJV Bible (Audio & Book): map the core Books 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
Implement an advanced search feature allowing users to filter and find specific verses.
Assumption to check: Limited search functionality for verses or books
Validate with people who use this workflow before building.
Hypothesis 2
Add a 'Do Not Disturb' feature to prevent interruptions during audio playback.
Assumption to check: Audio playback can be interrupted by notifications
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize text size and background color for better readability.
Assumption to check: No customization options for text size or background color
Validate with people who use this workflow before building.
Hypothesis 4
Create a more intuitive subscription management interface with clear options and descriptions.
Assumption to check: Subscription management is not user-friendly
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
The New King James Version of the Bible. You get a very fast app designed for Bible Study, quick navigation. No other Bible app matches the design, functionality of this Bible app. A simple, powerful design will allow you to easily read the Bible off-line (without an Internet connection), navigate, bookmark. This Bible contains two learning modes, audio Bible and Biblical texts, Find out for yourself why this Bibles are the top selling Bibles on iPhones and iPads. Audio Bible : This program allows you to listen the entire Old Testament and New Testament in audio form. All the audio is embedded in the software, so you can listen the Holy Bible at any time, without the need for a wireless connection. The program remembers the audio position so you can start listening where you last left off. The audio will keep playing even after the screen is locked so you can save battery power while continuing to listen. - Fast and easy to use. - Supports background play. - Sleep timer . - Supports multiple devices .at the same time enjoy the iPad / iPhone / iPod. Biblical Texts : The Holy Bible, Contains the complete Old Testament and New Testament. - Contents Index,accurate positioning . - Bookmarks,Continue reading. - Night mode, visual comfort. - Font sizes can be easily changed., humane reading. - Supports multiple devices .at the same time enjoy the iPad / iPhone / iPod.
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
Axios
React Navigation
React Native Audio
Typescript
BUILD KIT DIFFICULTY
Expert
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.
