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.
PreRun.io is the GPS navigation app built specifically for off-road adventure
Free · 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 PreRun.io: 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 user reviews and feedback available
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Potential for poor navigation accuracy
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features for user engagement
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchase restrictions may deter users
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.
PreRun.io is the GPS navigation app built specifically for off-road adventure. Whether you're scouting desert routes, navigating remote trails, or exploring backcountry, PreRun gives you the tools you actually need. REAL FEATURES - Import GPX Routes — Load your route data instantly - Turn-by-Turn Audio — Distance callouts to every waypoint, configurable zones - Next 3 Waypoints Display — Always know what's coming: turn, danger, checkpoint - Quick Keys — Add waypoints on the fly while driving with one-tap buttons - Checkpoint Proximity Alerts — Never miss a checkpoint - Loop Mode — Run the same route repeatedly with automatic lap tracking - Section Delete — Clean up wrong turns or adjust routes in the field - Live Group Tracking — See your crew's live location on the map during rides - Offline Group Tracking via LoRa Mesh — Connect a Meshtastic device via Bluetooth and track your group even without cell service. Bring your own hardware. BUILT FOR THE REAL WORLD - Works Offline — Download maps ahead of time, navigate without cell service - Speed Display — Real-time MPH with large, glanceable readout - Compass Pointer — Always points toward your next waypoint - 3D Flyover Preview — Visualize the route with terrain before you drive it - Export GPX with Waypoints — Share routes with your team, annotated with your notes BUILT FOR THE DIRT PreRun wasn't built by a navigation giant with generic "outdoor" features tacked on. It was built by people who actually drive off-road and know what matters when you're bouncing through the desert at speed. The interface is designed to be used with gloves, in sunlight, while moving fast. The Quick Keys system lets you create custom buttons for the hazards and waypoints you actually care about — cattle guard, wash, soft sand, fuel stop, spectator point. Tap once while driving. No menus, no fiddling. The turn detection algorithm understands off-road waypoints — it knows the difference between a note at a gate and a critical turn at a Y-intersection. Audio callouts are configurable with warning zones, approach zones, and arrival zones so you're never surprised. PRICING Free to try: Load GPX files, preview routes, explore the map interface. PreRun Pro ($49.99/year): Unlock follow mode, audio navigation, Quick Keys, exports, and all premium features. WHO THIS IS FOR - Off-road adventurers exploring BLM land, desert trails, and backcountry - Overland travelers navigating remote routes across continents - Anyone scouting routes and marking hazards - Trail runners and explorers who need reliable GPS in remote areas - Anyone who needs more than "turn right on Main Street" - Racers that want to save time and be safer. PreRun.io gives you real off-road navigation without the complexity. If you've ever wished Google Maps understood dirt roads, this app is for you. DISCLAIMER: PreRun.io is intended for off-road and recreational use only. GPS signals can be inaccurate and routes may contain errors. Always verify routes independently and drive according to conditions. PreRun.io is not responsible for the accuracy of directions provided. See our full Terms of Service at prerun.io/terms.html.
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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.