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.
Import and view GPS eXchange format (GPX) files
$0.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for GPX-Viewer: map the core Navigation workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Inability to edit GPX files directly within the app.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline functionality without purchasing the premium version.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No built-in navigation features for real-time tracking.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of customization options for route display.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Import and view GPS eXchange format (GPX) files. GPX-Viewer offers a customizable display of GPX files exported from many GPS devices and other apps that create GPX files. Import GPX files from the Cloud (includes iCloud, Dropbox, Google Drive, etc), your local device, or by using iTunes file sharing, email, a URL, or your pasteboard. - Customize your map: Apple Maps, Google Maps, OpenStreetMaps, or use a custom map tile source URL - Color customization for waypoints, track points, routes and tracks - Hide or show the waypoints, track points, routes or tracks on the map - Choose units: Metric, imperial, or nautical - Organize and quick-view files: Create folders to better organize your GPX files, and preview the tracks of all files within a folder - Import GPX files to the current GPX file - Send the waypoints to Apple Maps - Keep device from sleeping: Option to disable screen auto-lock Create and share charts: - Y axis: Elevation or speed - X axis: Track points, distance, or time A sample GPX file is included. Download free GPX files from many web sites, such as http://www.poi-factory.com and https://www.hikingproject.com. We also have GPX Viewer and GPX Editor apps for Mac computers. Visit the Mac App Store or our website for more info.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.