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
LanternTest
眼科の色覚検査で使用される、ランタンテストをiPhoneで再現しました。
$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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A product spec, screen plans, and build steps for your coding agent.
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What's included14 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for LanternTest: map the core Medical 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 push notifications for new test results or health tips.
Assumption to check: Lack of user engagement features such as reminders or educational content
Validate with people who use this workflow before building.
Hypothesis 2
Add sharing functionality via email, SMS, or social media.
Assumption to check: No social sharing options for results
Validate with people who use this workflow before building.
Hypothesis 3
Implement charts or infographics for better understanding of test results.
Assumption to check: Limited data visualization for results interpretation
Validate with people who use this workflow before building.
Hypothesis 4
Enhance security features and provide clear privacy policies.
Assumption to check: Potential privacy concerns with data management
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
眼科の色覚検査で使用される、ランタンテストをiPhoneで再現しました。 画面に合計９回表示される２つの点の色を答える事で色覚の検査ができます。 ー使い方ー １．画面をなるべく顔から離して検査してください。 ２．赤、緑、黄のうち上下に２つの点が表示されます。点は同じ色が表示される事もあります。 ３．点は２秒間表示されます。その後、画面が切り替わり回答画面が表示されます。 ４．赤、緑、黄のボタンが上下それぞれ表示されますので、見えた色のボタンを押してください。 ５．検査は９回行われます。検査が終わると結果が表示されます。 【使用上の注意】 このアプリケーションは色覚の正常・異常を断定するものではありません。 正確な診断は眼科医の診察をお受けください。
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.
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BUILD KIT DIFFICULTY
Starter
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.
