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
Plant Light Meter
After excessive watering, lack of light is the second most common cause of death of indoor plants
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
1,069 ratings · Top 15%
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 included17 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 Plant Light Meter: map the core Utilities 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
Provide more robust history features with filtering and sorting.
Assumption to check: Limited measurement history retention
Validate with people who use this workflow before building.
Hypothesis 2
Implement calibration options for better accuracy.
Assumption to check: Inaccurate readings on some devices
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to share measurements via social media or email.
Assumption to check: No sharing options for results
Validate with people who use this workflow before building.
Hypothesis 4
Include tips on optimal light levels for various plants.
Assumption to check: Lack of educational content
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
After excessive watering, lack of light is the second most common cause of death of indoor plants. Better light conditions will keep your plants healthy. Measure your plants’ ideal light levels for the price of a cup of coffee! How to use: - Launch the application - Point the camera toward the plant’s leaves - Press the “Measure” button How to interpret the measurement: - Very low light: Difficult conditions for plants to survive. - Low light: For plants that can tolerate low levels of light, such as the aglaonema, parlor palm, and philodendron. - Medium light: For the majority of indoor plants, such as the Dracaena, Pothos, and spider plant. - High light: For plants that love light, such as the zebra plant, areca palm, and croton. Features: - Detection of natural light & artificial lights - Compatible with rear camera only Notes: This application allows you to measure the light levels of indoor plants. However, if you need very precise measurements, the use of professional equipment is recommended.
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
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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.
