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
Cleaner: Storage Cleaner
Running out of storage space?
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.6
390 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included
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 Cleaner: Storage Cleaner: 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
Allow users to select specific categories or file types to clean.
Assumption to check: Limited customization options for cleaning preferences
Validate with people who use this workflow before building.
Hypothesis 2
Implement better algorithms or user confirmations before deletion.
Assumption to check: May misidentify files to delete
Validate with people who use this workflow before building.
Hypothesis 3
Provide a history feature to track past cleanings.
Assumption to check: No history of previous cleanings
Validate with people who use this workflow before building.
Hypothesis 4
Include tips or guides on how to manage storage effectively.
Assumption to check: Lack of user education on storage management
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 space? Whether your camera roll is packed with similar selfies, your email inbox is overflowing, or large videos are slowing down your device, Cleaner makes phone maintenance fast, easy, and secure. With just a few taps, you can analyze your storage and sweep away the digital clutter you no longer need. Features: •Duplicate Photo & Video Cleaner: Instantly scan your gallery to identify and delete duplicate or similar photos, burst shots, and redundant videos. Keep your best memories and trash the rest. •Large Video Remover: Quickly find and sort the heaviest videos taking up precious gigabytes on your phone so you can easily delete them. •Powerful File Compression: Want to keep your files but save space? Compress large files and media directly on your device without losing quality. •Custom Charging Animations: Add a personal touch to your device! Swap out the boring default battery screen for sleek, custom charging animations. Stop deleting the apps you love just to take a new photo. Download Cleaner: Storage Cleaner today and give your iPhone the breathing room it deserves! This app uses auto-renewable subscriptions that charge your account 24 hours before the period ends. Turn off auto-renewal in Account Settings after purchase to avoid charges. Unused free trial portions are forfeited upon subscription. Cancel at least 24 hours before the renewal date to avoid billing Terms of Service: https://sitouads.com/tos.html Privacy Policy: https://sitouads.com/privacy.html
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
React Navigation
Axios
Zustand
React Native Reanimated
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
