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
Film Light
Film Light，做你口袋里的专业数字测光表！适用于胶片摄影、影视灯光。
$1.99
PRICE
$1.99
No 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 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 Film Light: 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
No watermarks, premium for HD export only
Assumption to check: Watermarks on free tier
Validate with people who use this workflow before building.
Hypothesis 2
Chunked processing with progress indicator
Assumption to check: Crashes on large files
Validate with people who use this workflow before building.
Hypothesis 3
AI-powered filters and one-tap enhance
Assumption to check: Limited filters
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
Film Light，做你口袋里的专业数字测光表！适用于胶片摄影、影视灯光。 基于场景参考(Scene-Referred)的专业摄影测光表 APP。基于 Apple Log 色彩管线，高效测光，精准预览。独创的拟物风拨盘测光 UI，可快速进行光圈优先，快门优先以及手动曝光预览模式切换。内置经典胶片模拟LUT，亦可自定义导入 .cube 文件。支持近 1 度精准点测、智能矩阵测光。便捷的曝光补偿、ND 滤镜计算。 独创的测距功能，依靠LiDAR硬件，实时计算并预览你的景深范围。具备深度俯视图、深度伪色功能。估焦相机再也不用靠猜了！ 不止是测光表，更是你的摄影日志。内置相册功能，支持项目与胶卷管理；相册可查看 EV 点表、随时切换 LUT 预览，让每一次曝光决策都留有记录。 机型要求： iPhone 15 Pro 及后续支持 Apple Log 的机型可获得完整体验。在不支持 Apple Log 的机型上，Film Light 将以 HLG 模式运行；由于该模式下的画面经过局部影调映射（LTM），任意移动取样点后的读数无法保证准确，因此自定义 EV 点表结果并不准确。 测距功能需要使用搭载 LiDAR 硬件的 iPhone，需要 iPhone 12 Pro/Pro Max 以上的 Pro/Pro Max机型。
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
React Native
FFmpeg
Supabase Storage
RevenueCat
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.
