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
擇吉(實用)
擇吉(SelectGood)，是一款在日常生活中十分有用的玄學軟體。適合對玄學算命有興趣的人士使用。
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 擇吉(實用): 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 gamification elements like rewards for using auspicious dates.
Assumption to check: Limited user engagement due to lack of interactive features.
Validate with people who use this workflow before building.
Hypothesis 2
Add user-generated tips and community sharing features.
Assumption to check: Insufficient content variety in tips and recommendations.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided onboarding flow with tooltips.
Assumption to check: Poor onboarding experience that confuses new users.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their preferences and notifications for different activities.
Assumption to check: Lack of personalization options for 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
擇吉(SelectGood)，是一款在日常生活中十分有用的玄學軟體。適合對玄學算命有興趣的人士使用。 可以通過輸入某個日子，確定這個日子適合做的事情和不適合做的事情；也可以在確定某個時期要進行某個事情，然後在這個時期內選擇合適的日子和時辰進行事情。 實用收費版本完全去除廣告，提供所有的完整功能。 -- 查詢某日的宜忌； -- 查詢某個時期做某事的吉日； -- 增加輸入命主出生時辰及排列命主八字； -- 增加自動挑選吉日中的良辰功能，自動過濾應避開的日子； -- 顯示吉日良辰並且同時排列命主八字和吉日良辰的四柱，方便挑選更適合命主的時間； -- 增加支持更多時間輸入方式； -- 支持年份1600-2200，可選擇設置； -- 支持Pad大屏可設置；
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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
Zustand
@react-navigation/native
Day.js
Axios
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.
