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.
App Overview
terramet
TerraMet puts U.S
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for terramet: map the core Weather workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Focus on reliable data sources and real-time updates to improve accuracy.
Assumption to check: Weather apps often provide inaccurate forecasts and data
Validate with people who use this workflow before building.
Hypothesis 2
Add features for users to personalize their experience, such as theme selection and widget customization.
Assumption to check: Limited customization options for users
Validate with people who use this workflow before building.
Hypothesis 3
Implement a clear and simple navigation structure to enhance user experience.
Assumption to check: Complex navigation can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize notification settings for severe weather alerts.
Assumption to check: Push notifications can be overwhelming
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
TerraMet puts U.S. Bureau of Reclamation (USBR) Hydromet and AgriMet station readings in your pocket, with clean, fast charts built for the field. Browse a built-in catalog of more than 440 mapped stations across the Pacific Northwest region Oregon, Idaho, Washington, Montana, Wyoming, Nevada, and California. Not in the catalog? You can enter any station ID supported by the USBR to monitor it directly. Pick any station by ID, by name, or by tapping it on the map, then watch exactly the parameters that station measures discharge, flow, water level, temperature, and more. Each station reports its own set of parameter codes (pcodes), and TerraMet shows just those. FEATURES • Interactive charts — Smooth, horizontally scrollable line charts with hourly and daily resolution. Scroll back through history; older data loads automatically. • Multi-parameter view - Show or hide any parameter with a tap. Every line and its value axis share the same color, and the left/right scales stay pinned on screen as you scroll so you always know the values. • Live updates - A built-in refresh timer tracks each station's data cadence and pulls the latest readings automatically, with a countdown to the next expected sample. A clear banner appears if the source data is lagging. • Years of history - Jump between years, browse by month, and load any year on demand. • Threshold reference lines — Draw a dashed reference line at any value for a station's parameters. Lines are saved per station and restored every time. • Station map - Find stations on a map across the Pacific Northwest (442 stations in OR, ID, WA, MT, WY, NV, and CA). Blue pins have exact coordinates; orange pins are approximate. Any USBR station ID can also be entered manually. • Parameter dictionary - Built-in reference of the standard Hydromet parameter codes and what they mean. Your station selection and preferences are saved on device and restored the next time you open the app. TerraMet is an independent app and is not affiliated with or endorsed by the U.S. Bureau of Reclamation. Data is sourced from publicly available USBR Hydromet/AgriMet services and is provided as-is for informational purposes.
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
Axios
React Navigation
React Native Maps
BUILD KIT DIFFICULTY
Intermediate
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.
