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
Large Video Cleaner
Running out of storage? Large Video Cleaner helps you quickly find and remove the biggest videos clogging up your photo library.
$4.99
PRICE
$4.99
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 included15 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 Large Video Cleaner: 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 advanced filtering options and sorting by size or duration.
Assumption to check: Users may struggle to find and manage large video files effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Provide more detailed metadata for each video.
Assumption to check: Limited information about videos may lead to user confusion.
Validate with people who use this workflow before building.
Hypothesis 3
Add a preview option for videos before deletion.
Assumption to check: Users may be hesitant to delete videos without confirmation.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a review or rating system for the app's effectiveness.
Assumption to check: The app might lack community features or feedback.
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
Running out of storage? Large Video Cleaner helps you quickly find and remove the biggest videos clogging up your photo library. We all have them — accidentally recorded videos, hours-long screen recordings, or videos your kids left recording overnight. These massive files silently eat up your iCloud and device storage. Large Video Cleaner sorts your entire video library by file size so the biggest space hogs appear first, making it easy to reclaim gigabytes of storage in minutes. KEY FEATURES: - Largest First — Videos are sorted by file size so you immediately see what's using the most space. - Quick Review — Tap any video to preview it, then decide to keep or delete with one tap. - Bulk Actions — Select multiple videos at once to keep or delete them in batches. - Keep List — Mark videos as "Keep" to hide them from future reviews without deleting them. - People Detection — Automatically detects whether videos contain people to help you identify junk recordings like accidental pocket videos or blank wall recordings. - Smart Filters — Filter your library to show only videos with or without people detected. - Customizable — Adjust page size, thumbnail size, sort order, and detection accuracy in Settings. - Safe Deleting — Deleted videos go to the Recently Deleted folder in Photos, where you have 30 days to recover them. - Works Offline — Everything runs on your device. No accounts, no cloud, no data collection. Perfect for parents whose kids fill up the iPad with endless recordings, or anyone who wants to take control of their video storage.
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
Expo
Zustand
react-navigation
react-native-fs
expo-permissions
BUILD KIT DIFFICULTY
Intermediate
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.
