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.
The perfect companion for your next outdoor adventure
$9.99 · 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 Handy GPS: 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 compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchase process can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of voice navigation
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Insufficient user support options
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.
The perfect companion for your next outdoor adventure. Seek, find, record and return home with Handy GPS. This app is a real navigation tool designed for outdoors sports like hiking, bushwalking, mountain biking, kayaking and trail riding. It allows you to work in UTM or lat/lon coordinates. Features: * View your current location in UTM or Lat/Lon formats. * Record and/or manually enter waypoints in UTM, Lat/Lon, or MGRS. * Goto a waypoint, with optional audio proximity alarm and spoken directions. * Record a track log. * Show your current location, waypoints and tracklogs on a map. * Export waypoints and tracklogs to a KML file for viewing in Google Earth, or to a GPX file. * Export waypoints to a comma delimited (CSV) text file. * Import KML or GPX files and view in the app. * Email your current location to a friend. * Odometer to keep track of how far you've gone. * Magnetic compass. * Elevation profile. * Compute sun and moon rise and set times. * Supports both metric and US/imperial units. * Supports datums WGS84, GDA94, AGD66 and AGD84. (Use WGS84 for NAD83) * Allows entry of parameters for a custom datum (e.g. ED50, SAD69, OSGB36, GDA2020 etc), as well as supporting affine parameters for local grid systems. * Can display your location a normal grid ref, an MGRS grid ref (WGS84 datum only), or as a UK Ordinance Survey (OS) grid ref. * Can download offline map tiles for use where there is no cellular coverage. * Can import pre-prepared state or country-level base maps from a zip file. * Optional walk timer. * Email your current waypoints and tracklogs as a KML file. * Take photos from within the app to be stored with the current session. Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life. To save battery power you can close the app from the task manager. The developer accepts no responsibility for you getting lost while using this app.
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.