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
Lightframer Pro
Lightframer Pro turns your iPhone into a professional cinema viewfinder with real-time sun tracking.
$19.99 · In-app purchases
PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
6 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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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/
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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 Lightframer Pro: map the core Photo & Video 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
Include more advanced editing tools like AI background removal and batch editing.
Assumption to check: Limited editing features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Offer a free trial or freemium model to attract more users.
Assumption to check: High price point for the app.
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud storage to save user edits and projects.
Assumption to check: No cloud backup for edits.
Validate with people who use this workflow before building.
Hypothesis 4
Create a community forum for users to share tips and receive support.
Assumption to check: Lack of user community or support.
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
Lightframer Pro turns your iPhone into a professional cinema viewfinder with real-time sun tracking. PREVIEW YOUR FRAME Select from a library of cinema cameras and lenses — ARRI, RED, Sony, Canon, Blackmagic, and more. See exactly how your chosen setup frames the shot, right on location. No guesswork. No rental truck needed. TRACK THE SUN Plan your shoot around the light. Lightframer Pro shows the sun's path across the sky in real time — golden hour, blue hour, sunrise, and sunset — overlaid directly on your viewfinder. Know your light before you call "action." FRAME LINES FOR EVERY RATIO Overlay frame lines for any aspect ratio: 2.39:1 anamorphic, 1.85:1 theatrical, 17:9 DCI, 16:9 HD, 4:3 open gate, or set your own custom ratio. See your final deliverable frame while you scout. EXPORT WITH FULL CINEMA DATA Every capture includes a metadata strip with camera, lens, focal length, aspect ratio, sun position, compass heading, and white balance. Share scout photos your entire crew can reference. BUILT FOR CINEMATOGRAPHERS - Real-time AR viewfinder matched to your camera and lens - Sun path with golden hour, blue hour, sunrise, and sunset times - Compass heading overlay - Portrait and landscape modes - Frame line shading and color controls - Photo export with cinema metadata Whether you're a DP scouting a commercial, an indie filmmaker planning your next short, or a director blocking scenes on location — Lightframer Pro gives you the tools to plan every shot with precision.
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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.
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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.
