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
Zip Unzip - Unrar Tool PRO
Unzip Pro Tool is a comprehensive file archiver and extractor designed for fast and efficient management of compressed files on your device
$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 included16 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 Zip Unzip - Unrar Tool PRO: 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
Ensure support for various file types and provide a unified management experience.
Assumption to check: Inconsistent file management across different formats.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate with more sharing platforms and offer direct sharing options.
Assumption to check: Limited sharing options.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the extraction process and provide clear instructions.
Assumption to check: Confusing user interface for file extraction.
Validate with people who use this workflow before building.
Hypothesis 4
Add support for cloud services like Google Drive and Dropbox.
Assumption to check: Lack of cloud storage integration.
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
Unzip Pro Tool is a comprehensive file archiver and extractor designed for fast and efficient management of compressed files on your device. With support for popular formats like ZIP, RAR, and 7Z, this app makes it easy to handle all your archive needs. Main Features: - Quickly decompress and extract files from ZIP, RAR, 7Z, and other formats, including split and encrypted archives. - Secure your data with password protection and AES encryption for both extraction and compression. - Create new ZIP and 7Z archives, with options for encryption and customizable split sizes. - Manage your files locally with intuitive list and grid views, batch import of photos and videos, and standard operations like create, rename, move, and delete. - Import files using multiple methods, including SMB, FTP, iCloud, and wireless sync. - Preview and edit a wide range of file types: documents (DOC, PDF, TXT), images (JPG, PNG, GIF), videos (MP4, AVI, MKV), and audio (MP3, WAV). - Built-in image and video editing tools: apply filters, crop, add text, and export GIFs. - Advanced security with fingerprint and face recognition, plus app password protection. Extra features like an eye-friendly reading mode for text files and a versatile video player with speed control. Unzip Pro Tool is ideal for anyone who needs a fast, secure, and versatile solution for working with compressed files on the go.
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
expo-file-system
@expo/vector-icons
react-native-paper
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.
