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
Yi Jing Divination
I-Ching Professional leads you step by step to the secrets of Yi Jing, by analyzing in an understandable way, the calculating and learning of this magical art.
$8.99 · In-app purchases
PRICE
$8.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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 Yi Jing Divination: map the core Lifestyle 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
Incorporate social sharing and community features.
Assumption to check: Limited user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Offer a free trial to attract more users.
Assumption to check: High initial purchase cost
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize their readings based on preferences.
Assumption to check: Lack of personalization
Validate with people who use this workflow before building.
Hypothesis 4
Implement a guided onboarding process to enhance user experience.
Assumption to check: Difficult to navigate for new 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
I-Ching Professional leads you step by step to the secrets of Yi Jing, by analyzing in an understandable way, the calculating and learning of this magical art. In this application all the three methods (Yarrow Sticks, Coin Method and Six Wands), are presented so as to choose which one of them is more suitable for you. ~Let I-Ching help you analyze your destiny!~ This Application Includes: History of I-Ching Introduction to I-Ching Learning Methods of I-Ching : - The Yarrow Sticks Method - The Coins Method - The Six Wands Method How to choose the Chinese Coins for Divination. Complete Analysis of 64 Hexagrams: - Analysis of each line of the Hexagram - The Judgment - The Image - The Lines - Object and Subject - Eight Palaces 64 Gua - Flying Spirit and Hiding Spirit. Yin and Yang. Eight Trigrams: - Full analysis of the Eight Trigrams. Hexagram Calculation: - Calculation of the birthday Hexagrams of a person, or any date you want.
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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/native
axios
react-native-share
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.
