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
ESV Bible
The ESV Bible app allows you to easily read, study, and engage with God’s Word wherever you go, making it the best possible Bible reading experience for your phone or tablet.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
10,148 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'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 ESV Bible: map the core Reference 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 multiple translations and user-selected language options.
Assumption to check: Limited translations available.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize search results with better indexing.
Assumption to check: Search functionality can be slow.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the paywall and provide clearer value for premium features.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a sharing feature for notes and verses.
Assumption to check: User notes are not easily shareable.
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 ESV Bible app allows you to easily read, study, and engage with God’s Word wherever you go, making it the best possible Bible reading experience for your phone or tablet. Listen to Scripture with audio Bibles and meditate on God’s Word with instrumental background music. Customize your experience with a wide variety of reading plans and thematic playlist options, helping you make daily Bible reading a habit every day. READ THE BIBLE WHEREVER YOU GO • Toggle display options to a streamlined, distraction-free reader's mode • Search tools allow you to quickly search the Bible by reference, keyword, or phrase • Quick access to cross-references LISTEN AND MEDITATE • Listen to the Bible read aloud by acclaimed Christian artists, pastors, and Bible teachers • Voices include Kristyn Getty, Ray Ortlund, Jackie Hill Perry, Michael Reeves, and more • Instrumental background music to help you meditate as you listen • A diverse selection of musical styles, artists, and genres • Individual volume controls allow you to adjust the music and Bible audio separately MAKE A HABIT OF BIBLE READING • Choose from over 50 Bible reading plans • One-year, devotional, and topical plans offer a wide variety of options to fit your lifestyle and reading goals DIVE DEEPER INTO GOD’S WORD • Access the ESV Global Study Bible for free • Subscribe to unlock a full library of study resources, including the ESV Study Bible, ESV Archaeology Study Bible, Preaching the Word commentary series, ESV Expository Commentary series, and more ENGAGE WITH SCRIPTURE • Record your personal reflections using the easy-to-use notes feature • Highlight and bookmark favorite portions of Scripture • All content saved via a free account is synced with ESV.org—giving you access to personal notes, bookmarks, and highlights from any device • Adjust dozens of layout and text settings including font size, red letter, background color, and more UNLOCK PREMIUM FEATURES • Access to the full range of study Bibles, commentaries, and playlists available online and in the app • Over 50 playlists compile thematic verses to guide you through a particular mood, topic, or season Deepen your time in God’s Word with customizable study and audio features available with the ESV Bible app. Download for free today! EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Supabase
react-navigation
zustand
BUILD KIT DIFFICULTY
Advanced
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.
