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.
GPS Stone trip tracker is a GPX file generator
$1.99 · 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 GPS Stone (GPX Trip Recorder): 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: Limited offline functionality.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface can be cluttered.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: GPS tracking may drain battery quickly.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase process may be unclear.
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.
GPS Stone trip tracker is a GPX file generator. Display current GPS information, speed (max and average), position, distance, elevation, and shows on the map but also record all the trip information to review it in Google Earth. GPS Stone records and exports all your trips to your main computer for geo-tagging/photo-tagging or trip management. Follow your trip on the map in real time, or use the detailed view with the current speed, average speed, altitude, traveled distance, position accuracy, direction, and more! Once back home, review where you have been at a given time, and for how long. It also works for sport activities, cycling, car, trekking… of course, it can be useful for any photo tour walk. Additionally, GPS Stone can export the trip you’ve recorded in the standard GPX format. See your trip on Google Earth, or compatible software such as Atom GPS and GeoSetter for PC or HoudaGeo for Mac. ----------------------------------------------- GPS Stone Trip Recorder can: • Record and date your trip • Show live path on the map • Auto-restart recording after a phone call • Check your instant, max, and average speed • View the distance, altitude, GPS accuracy • GPS coordonnates • Compass to see your current direction • Delete and rename any trip • Units: mph or km/h • Fine tuning of log details and file size • Send GPX by mail This application use background mode, continued use of GPS can dramatically decrease battery life.
Written user reviews are not shown here. Check current App Store reviews >
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.