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
RatePunk: Cheap Plane Tickets
Enjoy up to 90% off flights and save an average of $488 per ticket.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
6,784 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 included17 files
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 RatePunk: Cheap Plane Tickets: map the core Travel 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
< Scroll to see more >
App Store description
Enjoy up to 90% off flights and save an average of $488 per ticket. * Set your home airport, and we will find exclusive flight deals that match your preferred destinations – making travel affordable and effortless. * Forget endless searching. We’ll notify you of valuable airline promotions, error fares, and mistake fares as they happen. * Unlock ultimate savings and elevate your travel experience today! Subscription Options for RatePunk: Choose between: Yearly Subscription Weekly Subscription Manage your subscription directly on your iPhone: Open Settings Tap your name Tap Subscriptions By using RatePunk, you agree to our Terms of Services, Privacy Policy: Privacy Policy - https://www.ratepunk.com/privacy Terms Of Use - https://premium.ratepunk.com/terms Check out our homepage for more: https://www.ratepunk.com/
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 comprehensive comparison feature that clearly displays prices side-by-side.
Assumption to check: Users find it difficult to compare prices across different airlines.
Validate with people who use this workflow before building.
Hypothesis 2
Create a clear, guided flow for users to understand subscription benefits and features.
Assumption to check: In-app purchases can be unclear or confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance the detail view to show comprehensive information about each flight.
Assumption to check: Limited availability of flight details and amenities.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize API calls and implement caching to improve load speed.
Assumption to check: Users experience performance issues with loading times.
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
axios
zustand
react-native-reanimated
expo-router
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.
