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.
Subpoint shows you where the International Space Station is right now,
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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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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 Subpoint: ISS Atlas: map the core Education 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 interactivity with ISS tracking and learning resources
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No offline access to learning resources
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High churn rate due to paywall
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.
Subpoint shows you where the International Space Station is right now, who is on board, and what the crew is doing today. Unlike other ISS trackers, it doesn't stop at the dot on the map. Subpoint connects live orbital data with the daily story of the station: which experiments are running, in which module they live, and which astronauts are working on them. It's a tracker, a crew companion, and a research atlas - in one beautifully made app. CORE FEATURES • Live ISS tracker - see the International Space Station overhead in real time, with precise orbit computation from current TLE data. • Pass predictions - find out when the ISS is visible from your sky with the naked eye. Your location never leaves your device. • Crew on board - full profile for every astronaut on the station: mission, agency, biography, time in space, spacewalks. • Daily activity - what the crew did today, structured from NASA's official Space Station Blog and linked to research experiments and the modules they live in. • Experiment depth - every research experiment explained in plain English: what it studies, who runs it, in which module. Sourced from NASA's own catalogs. • 3D module viewer - explore the ISS from the inside, with real racks and hardware. Tap a module and see what is happening there right now: Kibo, Columbus, Destiny, Harmony, Tranquility and more. • Expeditions - every crew rotation since the station's first expedition: patches, members, mission highlights, attached spacecraft. Over 70 expeditions accessible. • Beautiful design - Subpoint is built for ISS enthusiasts who want a tracker that respects their attention. No ads, no tracking, no clutter. DATA SOURCES NASA, ESA, JAXA, Roscosmos. Orbital data from Celestrak and Space-Track. Images from Wikimedia Commons. PRIVACY Your location never leaves your device. We don't track users. No ads. No analytics. No third-party SDKs collecting anything. Subpoint is a companion app for people who want more than a position on a map - for people who want to know what the International Space Station is doing, right now, today, every day.
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.