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
Fast Clean: AI Storage Cleaner
Your phone feeling a little crowded?
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.2
62 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.
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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/
Preview a sample Build Kit No email needed
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 Fast Clean: AI 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Your phone feeling a little crowded? Let Fast Clean give it a fresh start — smart, simple, and powered by AI to help you stay organized without the effort. One-Tap Smart Cleaning Fast Clean quickly finds things you might want to tidy up: - Similar photos - Random screenshots - Space-hungry videos - Duplicate contacts Just tap once and clear the clutter — fast and easy. AI Cleaning Suggestions Fast Clean gives you simple, personalized suggestions like: "Why is my iPhone storage full even though I deleted apps?" "How do I make my iPhone battery last all day?" "How do I manage app permissions for camera, mic, and location?" No pressure, just helpful recommendations so you can manage your iPhone smarter. Private Space Have photos you prefer to keep separate? Store them in Private Space so they stay organized and away from your main photo album. Tools You’ll Actually Use Fast Clean also comes with a small toolbox for daily tasks: - Compress photos & videos to save extra space - IP lookup - Network speed test - Charging animations - Home screen widgets Why People Like Fast Clean It keeps your phone feeling lighter, cleaner, and easier to use. No complicated steps, no stress — just quick tools that help your device feel refreshed. Give your phone a little love. Download Fast Clean and clean the smart way.
Written user reviews are not shown here. Check current App Store reviews >
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 a preview feature for files before deletion.
Assumption to check: Users often find storage cleaning apps can be aggressive and delete important files.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance the AI algorithm for better accuracy based on user behavior.
Assumption to check: Some users report that the AI recommendations can be inaccurate.
Validate with people who use this workflow before building.
Hypothesis 3
Add a help section with FAQs and a support contact form.
Assumption to check: The app may lack user support or FAQs.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize scanning speed and provide feedback during the process.
Assumption to check: Performance issues during scanning can frustrate users.
Validate with people who use this workflow before building.
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
@react-native-async-storage/async-storage
expo-charts
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.
