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
Merge GPX
Merge GPX: Powerful iOS Native Route Merging!
$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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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.
JavaScript is required to complete mailbox verification.
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 Merge GPX: map the core Navigation workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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 robust preview feature before merging.
Assumption to check: Difficulty in merging multiple GPX files correctly
Validate with people who use this workflow before building.
Hypothesis 2
Enhance offline mode with downloadable GPX data.
Assumption to check: Limited offline capabilities
Validate with people who use this workflow before building.
Hypothesis 3
Add loading indicators and confirmation messages.
Assumption to check: Lack of user feedback on actions
Validate with people who use this workflow before building.
Hypothesis 4
Enable file renaming, sorting, and sharing functionalities.
Assumption to check: No detailed file management 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
Merge GPX: Powerful iOS Native Route Merging! "Merge GPX" routes with ease. Perfect for combining multi-day recordings, reconnecting interrupted journeys, integrating data from multiple devices, and creating comprehensive route visualizations. Quickly handle multiple files from different sources, and enjoy seamless integration with Apple Files; all offline with a beautiful UI. Your adventures, your way, right on your device. With merged routes you can: - Combine multiple GPX files recorded on different days or devices to create one continuous route for complete journey visualization - Reconnect interrupted recordings when GPS devices fail mid-activity (gaps in data will be filled) - Integrate data from multiple sources - Create single navigation files for complex multi-segment journeys (no more switching between different "courses" on your Garmin during rides) - Build complete trail networks by combining individual segment recordings into comprehensive area maps The app also includes: * Support for all types of .gpx files from any GPS device or app * Very small app size (smaller than some web pages!) (for easy downloading on mobile data connections)! * Intelligent route connection using geodesic paths to bridge gaps between segments * Preserves recorded time, elevation, cadence and heart rate data (if present) * Native Dark mode support * Merge options: - Automatically sorted on import based on nearby start/endpoints. - Manual arrangement (drag and drop segments in your preferred order) * Two map view options: - 3D Earth view for terrain visualization - Traditional Map view for detailed route planning * Share merged routes with friends or sync directly to navigation devices via the Files app * Data validation to ensure clean, continuous merged tracks * Optimized to fully utilize devices running iOS 18+ Transform fragmented GPS data into complete journey stories - whether you're documenting epic adventures, creating navigation-ready routes, or building comprehensive activity records from multiple recording sources.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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 Navigation
Expo Document Picker
Zustand
React Native FS
React Native Reanimated
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.
