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
SunNav
SunNav is GPS navigation built specifically for golf cart drivers in Sun City, AZ.
$3.99
PRICE
$3.99
No 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
SunNav is GPS navigation built specifically for golf cart drivers in Sun City, AZ. Every other navigation app — Google Maps, Apple Maps, Waze — routes you the fastest way, even if that means sending your golf cart onto a road with a 45 mph speed limit. SunNav is different: it checks every road on every route and will never take you somewhere your cart doesn't belong. WHY SUNNAV • Every route is automatically filtered to roads posted 35 mph or under • If a faster route would put you on a high-speed road, SunNav finds a safer way around it • Get an alert before you approach a road above the safe speed limit — so you can turn off before it's a problem BUILT FOR YOUR COMMUNITY • Map and points of interest tailored to Sun City, AZ • Quickly find rec centers, golf courses, medical offices, pharmacies, shopping, and dining • Save your favorite destinations for one-tap navigation GET THERE WITH CONFIDENCE • Turn-by-turn directions with voice guidance, so you can keep your eyes on the road • Offline maps mean navigation still works in areas with weak cell signal • Clean, simple screens designed to be easy to read at a glance SIMPLE PRICING Pay once, $3.99, and it's yours. No subscription, no recurring charges, no trial to remember to cancel. SunNav was built by and for the Sun City community, with one goal: get you where you're going without ever putting your golf cart somewhere it shouldn't be.
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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.
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
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
