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
七政四餘排盤
七政四餘是古人對太陽系內的幾個主要行星運動規律進行研究而發展出來的一門理論，其中太陽、月球、金星、水星、火星、木星和土星這七顆可以觀測到的行星被稱為七政，紫炁、月孛、羅睺、計都這四顆星體代表著太陽與月亮運行中的特殊位置，無法直接觀測，稱為四餘星， 為了刻畫這十一顆星體的運動軌跡，需要進行繁雜的運算，本App把繁雜的運算交給iOS設備進行，通過改變各種參數，將七政星四餘星各種資訊呈現到用戶面前，此外還提供了日月食的計算，可以蒐索過去...
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.0
1 ratings · Below Average
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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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/
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 七政四餘排盤: 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
Enhance the educational content about astrology and numerology.
Assumption to check: Limited user engagement due to unclear value proposition
Validate with people who use this workflow before building.
Hypothesis 2
Optimize the app for better speed and responsiveness.
Assumption to check: Inconsistent performance and slow loading times
Validate with people who use this workflow before building.
Hypothesis 3
Implement a modern, user-friendly design with better guidance.
Assumption to check: Poor user interface design leading to confusion
Validate with people who use this workflow before building.
Hypothesis 4
Introduce more engaging free features to attract users before upselling.
Assumption to check: Limited free features, discouraging potential 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
七政四餘是古人對太陽系內的幾個主要行星運動規律進行研究而發展出來的一門理論，其中太陽、月球、金星、水星、火星、木星和土星這七顆可以觀測到的行星被稱為七政，紫炁、月孛、羅睺、計都這四顆星體代表著太陽與月亮運行中的特殊位置，無法直接觀測，稱為四餘星， 為了刻畫這十一顆星體的運動軌跡，需要進行繁雜的運算，本App把繁雜的運算交給iOS設備進行，通過改變各種參數，將七政星四餘星各種資訊呈現到用戶面前，此外還提供了日月食的計算，可以蒐索過去千年和未來百年的日月食的發生時間, 讓用戶能更便捷的瞭解、研究和應用古人關於七政四餘理論以及古代曆法的知識。本App可離線運行
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
Zustand
react-native-reanimated
expo-router
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.
