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
iRAR - zip,rar,7z file opener
iRAR is a powerful archiver with a variety of convenient features
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
5,274 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's included18 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 iRAR - zip,rar,7z file opener: 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
Expand support to other formats like TAR, GZ for broader utility.
Assumption to check: Limited file format support beyond ZIP, RAR, and 7Z.
Validate with people who use this workflow before building.
Hypothesis 2
Implement better categorization and sorting options for a cleaner interface.
Assumption to check: UI can be cluttered with many files.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate more sharing methods (email, cloud storage) for convenience.
Assumption to check: File sharing options are limited.
Validate with people who use this workflow before building.
Hypothesis 4
Consider an ad-free subscription model for enhanced user satisfaction.
Assumption to check: Frequent ads can disrupt user experience.
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
iRAR is a powerful archiver with a variety of convenient features. Decompress the archive and browse the contents of the archive in various formats. - Supported formats for decompression:7Z, ZIP, RAR, RAR5, ZIPX, GZIP, ACE, AES, BIN, BZ, BZ2, CAB, MSI, GZ, ISO, LHA, LZ, LZMA, TAR, TBZ, TGZ, XZ ... - Support for extracting sub-volume archives。 - Support to create encrypted files in ZIP format, support AES256 encryption algorithm. - Supports compression of 4GB+ size files. - View files in various formats: DOC, XLSX, PPT, TXT, RTF, Pages, JPG, GIF, PNG... - Text reader: supports multiple reading formats of text, TXT, EPUB, CHM... - Video Player: Support almost all formats of audio and video. - File transfer: WiFi wireless transfer, share files between mobile phone and computer. - Security: Support passcode lock with Touch ID & Face ID. #In-App Purchase: Professional version for Lifetime: -One-time purchase, valid forever, can be resumed at any time. Professional version for one year: - Annual auto-renewable subscription, automatic renewal upon expiration. - After the purchase of the subscription item is confirmed, the subscription fee will be credited to your iTunes account. The subscription will automatically renew unless the automatic renewal feature is turned off at least 24 hours before the end of the current time period. The account will be charged for renewal within 24 hours before the end of the current period.Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Privacy Policy:https://iraropener.web.app/privacypolicy.html Terms of Use:https://iraropener.web.app/terms.html Contact us:[email protected]
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
expo-file-system
react-native-share
BUILD KIT DIFFICULTY
Advanced
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.
