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
Squam Lake Map
Squam Lake Map App shows your current position along with all the buoys on Squam Lake, and it works offline!
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
4 ratings · Top 5%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Squam Lake Map: 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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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
Simplify the UI with a clear layout and focused features.
Assumption to check: Users often find navigation apps cluttered and hard to use.
Validate with people who use this workflow before building.
Hypothesis 2
Provide comprehensive offline maps and features.
Assumption to check: Limited offline functionality in many navigation apps.
Validate with people who use this workflow before building.
Hypothesis 3
Make in-app purchases clear and easy to access.
Assumption to check: In-app purchase processes can be confusing or hidden.
Validate with people who use this workflow before building.
Hypothesis 4
Ensure rich and accurate details for all locations.
Assumption to check: Some apps lack detailed information about points of interest.
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
Squam Lake Map App shows your current position along with all the buoys on Squam Lake, and it works offline! It contains a compass to help you navigate the buoys. And It contains a list of helpful numbers to call in case you get stuck or need to order food. And now it includes a Live Tracker so you can see the path you have taken. To access the tracking menu, first tap the red button next to the Speed Bubble to start tracking. You will see your path. When you are finished tracking press the red tracking button again. Then long press on the Speed Bubble to see your most recent tracks. You can click show to view them on the map, hide to hide them, or delete to remove them. (Tracking data is stored locally on your individual device) Disclaimer: Buoy Locations are approximate. For actual locations refer to buoy positioning when actually on Squam Lake. LionEye Aerials is not responsible for incorrect buoy locations, incorrect paths, or boat accidents.
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
Supabase
React Navigation
react-native-maps
@supabase/supabase-js
BUILD KIT DIFFICULTY
Starter
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.
