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
Ice Report
Instantly report lake ice conditions at your current GPS location to other fisherman.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.2
83 ratings · Below Average
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 Ice Report: 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
Implement user-generated reports and feedback to improve accuracy.
Assumption to check: Users report inaccuracies in ice condition data.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to submit new locations for tracking.
Assumption to check: Limited locations available for tracking.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the UI and enhance navigation with better organization.
Assumption to check: User interface is cluttered and hard to navigate.
Validate with people who use this workflow before building.
Hypothesis 4
Enable offline access to improve usability in remote areas.
Assumption to check: No offline access to saved locations or reports.
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
Instantly report lake ice conditions at your current GPS location to other fisherman. Ice Report makes it easier to distribute information about lake ice thicknesses during the ice fishing season in Northern climates. Without this app users are left to scour the internet for forums or groups to get a report on ice for fishing. On the flip side, avid fisherman and resorts who help the community by reporting ice conditions can now post it for everyone to see. New reports are dark in color. Any report older than 3 days will be marked light in color. Ice Report defaults to showing reports made in the last 7 days. To use Ice Report simply login and check out the map. Keep in mind the Display Name you choose will be visible to other anglers. If you are out fishing, feel free to submit a report by pressing the + sign and selecting the ice thickness you measured at that location. The app uses your current GPS location, so please only submit reports while you are fishing. Premium users can place icons without GPS. If the report is in the wrong spot, select your report, then press the Delete button. Use the calendar icon to view reports submitted within a date range. The lake ice data is submitted by users and there is no guarantee of accuracy. Ice Report encourages every one to be safe on frozen lakes. Check with your local Department of Natural resources for safety information. This app uses Google Maps for iOS.
Written user reviews are not shown here. Check current App Store reviews >
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
Axios
Zustand
React Navigation
TypeScript
BUILD KIT DIFFICULTY
Expert
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.
