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.
Altitude Explorer
$3.99 · 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.
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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Altitude Explorer Explore the terrain beneath your routes with precise elevation data powered by the Copernicus DEM GLO-90 — a global Digital Elevation Model derived from TanDEM-X radar imagery, operated by DLR and Airbus Defence and Space under the European Union's Copernicus Programme. Global coverage of all land areas (approximately 90S to 84N latitude, 180W to 180E longitude). What you can do • Point query — tap anywhere on the map to get the exact elevation at that location • Line profile — place two markers and instantly generate a cross-section of the terrain between them • Road profile — follow a real driving or walking route and see how elevation changes along the way • Track import — load GPX, KML, KMZ, or GeoJSON files and visualise the elevation of your own tracks • Interactive chart — drag a scrubber along the profile chart to read elevation and distance at any point • Saved profiles — store your profiles in a personal library and revisit them anytime • PDF export — export any profile as a PDF with map snapshot, chart, stats and full data table Data & accuracy The dataset is hosted on proprietary servers for fast, direct access across all supported regions. Accuracy varies with terrain complexity — dense vegetation, steep slopes, and urban areas may introduce artefacts. Full attribution and the Copernicus Data Policy are available directly within the app under Settings → About. Customisation Choose your units (km/miles, m/ft), map style, interpolation algorithm, chart colour and line weight. Available in English, Italian, French, German and Spanish.
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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.