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.
Altimeter transforms your device into a reliable tool for measuring your current altitude.
$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 Altimeter GPS & Real Altitude: 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 for altitude recording.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of customization options for users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inaccurate altitude readings in some areas.
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.
Altimeter transforms your device into a reliable tool for measuring your current altitude. Elegant design inspired by aviation altimeters, an intuitive interface, and practical features for hikers, travelers, and the curious. Key Features: • Real-time altitude Get the exact altitude of your current location, in meters or feet, with dynamic updates. • GPS signal The app doesn't require an internet connection, just a GPS signal. • Flexible units Easily switch between meters and feet, depending on your preferences. • Automatic location detection The app locates your location and displays it on a map, showing the altitude, location name, address, latitude, and longitude. • Saving locations Save unlimited favorite locations or points of interest (in-app purchase required). • Design inspired by aviation instruments The interface is reminiscent of a cockpit altimeter, making the user experience pleasant and familiar. Instructions for use: For accurate measurements, position yourself in an open area to receive a GPS signal. When the app receives a GPS signal, the display will show your current altitude. You can select meters or feet directly from the settings. Why choose Altimeter? • Clear and immediate altitude display • Ability to save and recall favorite locations • Simple, no-frills use • Elegant interface consistent with real-world instruments • Extensive language support Support & Feedback: Do you have any suggestions or want to report a bug? Email [email protected] or visit www.lionsapp.com. If you like the app, please leave a review on the App Store.
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.