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
Da Liu Ren
The Master Application Da Liu Ren is an excellent reference manual for all those studying or using Da Liu Ren.
$44.99
PRICE
$44.99
No 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 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.
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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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
The Master Application Da Liu Ren is an excellent reference manual for all those studying or using Da Liu Ren. Divination methods, Da Liu Ren 大六壬 (The Great Liu Ren or Six Yang Waters), along with Qi Men Dun Jia 奇門遁甲 and Tai Yi Shen Shu 太乙神數, it is one of the collective Three Arts (San Shi 三式), China's Highest Metaphysical Arts. The application Da Liu Ren makes charting LiuRen Pan as easy as clicking a few buttons. This Application Includes Da Liu Ren Calculator Find the Liu Ren Chart on any date you want with absolute precision, taking into consideration the Longitude and Time Zone of the area. This application is useful only to those who have learned, or who are learning Da Liu Ren 大六壬. The Great Liu Ren Method (Sun Bin Divination 孫臏預測學) has been recorded dating before Xia Dynasty in 2100 bc; and that it was practiced by the Yellow Emperor during the Creator Period. This is by far, the most complicated and comprehensive of the three Liu Ren Methods. !!! We're always listening, so please send comments, suggestions and words of encouragement. !!!
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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
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.
