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
CSVToXLSX Converter
A professional CSV and XLSX file format conversion tool that provides simple and quick spreadsheet file conversion solutions.
$0.99 · In-app purchases
PRICE
$0.99
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'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 CSVToXLSX Converter: map the core Productivity 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
Expand supported formats beyond CSV for better usability.
Assumption to check: Limited file format support restricts user flexibility.
Validate with people who use this workflow before building.
Hypothesis 2
Implement user accounts for saved history and files.
Assumption to check: No user authentication leads to potential data loss.
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate progress indicators to enhance user experience.
Assumption to check: No feedback or progress indicators during conversion.
Validate with people who use this workflow before building.
Hypothesis 4
Add settings for user preferences, like default file paths.
Assumption to check: Lack of settings customization options.
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
A professional CSV and XLSX file format conversion tool that provides simple and quick spreadsheet file conversion solutions. Key Features: • CSV to XLSX: Easily convert CSV files to Excel-compatible XLSX format • XLSX to CSV: Quickly convert Excel files to universal CSV format • Batch Processing: Support for large file conversion • Instant Preview: Preview converted files immediately • Easy Sharing: Quick sharing and export of converted files Advantages: • Clean Interface: Clear and intuitive operation interface with zero learning curve • Fast Conversion: Efficient conversion engine saves your valuable time • Local Processing: All conversions are performed locally to protect your data security • Perfect Compatibility: Supports iPhone and iPad devices • No Internet Required: Use offline, convert files anywhere, anytime Perfect For: • Office data processing • Academic research data organization • Data format conversion for analysis • Cross-platform data exchange • Business report processing Whether you're a business professional, student, researcher, or data analyst, this app meets all your file format conversion needs. Complete conversions in just a few steps and make your work more efficient! Use Cases: • Business professionals handling data files • Students working with research data • Researchers organizing datasets • Data analysts preparing data • Anyone needing to convert between CSV and XLSX formats Key Benefits: • Save time with quick conversions • Maintain data integrity • Simple and user-friendly interface • Secure local processing • Professional-grade results Download now and say goodbye to complicated file format conversion hassles! Note: This app processes all conversions locally on your device, ensuring your data privacy and security.
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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
React Native
Expo
react-navigation
expo-file-system
axios
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.
