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
iLightningCam 2
iLightningCam 2 - The Second Generation - Real-time lightning photography with iPhone made easy.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
93 ratings · Top 30%
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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Combine features and design from your favorite apps.
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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 iLightningCam 2: 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
Implement faster capture algorithms and provide pre-capture settings to enhance performance.
Assumption to check: Users find the app can be slow to capture images during storms
Validate with people who use this workflow before building.
Hypothesis 2
Add a robust editing suite including filters and adjustment tools.
Assumption to check: Limited editing features after capturing images
Validate with people who use this workflow before building.
Hypothesis 3
Integrate easy sharing options for platforms like Instagram and Facebook.
Assumption to check: Difficulty in sharing images directly to social media
Validate with people who use this workflow before building.
Hypothesis 4
Clarify the benefits of premium features with better onboarding and feature highlighting.
Assumption to check: In-app purchases can be confusing and lack clear value
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
iLightningCam 2 - The Second Generation - Real-time lightning photography with iPhone made easy. It enables everyone to take spectacular pictures of real lighting strikes with an iPhone or iPad! After three years of development, iLightningCam 2 follows the unique iLightningCam, which was the only app with ISO control since 2012 with more than 160 000 users. iLightningCam 2 features: - Full AUTO Mode! No user input needed! The app changes automatically between day and night mode Continuous calculation of best ISO settings based on the last strikes - Original Photo Resolution, no tricks, no interpolation! - Much better detection! - Double-shot , + one image as blend of first and second shot! - New modern design! - For experts: ISO ranges are fully manually adjustable, if wished! iLightningCam 2 uses true real-time recognition of lightning strikes. Once recognized, your iPhone takes a picture of the recognized lightning in up to full resolution. And yes - your iPhone or iPad is fast enough! You only need a good view on a real thunderstorm. The app works free hand. Just point your iPhone towards the scene/part of the sky/thunderstorm where you expect the next lightning, start the iLightningCam 2 and wait, the app will automatically press the trigger if a lightning is detected in your view. Warning: Lightning storms are life threatening for you and your phone!!! Take care using this app! Do not take any risks and avoid exposure to thunderstorms! Use this app only in lightning and storm protected places. You are solely responsible for your actions and adverse consequences. Read full safety warning in the instructions page, before using this app. Who is it not for: It is not for children and it is not for mentally handicapped persons, as they may have not the ability to protect themselves against lightning or the associated storm.
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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
Expo Camera
React Navigation
Async Storage
React Native Reanimated
Axios
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.
