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
Slalom: Buoy Book
Buoy Book turns your phone into a ski log you'll actually keep up with
$2.99
PRICE
$2.99
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'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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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.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
Buoy Book turns your phone into a ski log you'll actually keep up with. Whether you're carving through a slalom course or just cruising behind the boat, log every set in seconds and watch your progress take shape over time. TRACK EVERY SET Record rope length, boat speed, and buoy count for each pass. Buoy Book builds a running history so you can see exactly how your skiing has improved — and spot your personal bests the moment you hit them. FREE SKIING COUNTS TOO Not every day on the water is about the course. Log free-ski sessions and save short clips right alongside your regular sets. YOUR GEAR, REMEMBERED Keep track of your ski, fins, boots, and bindings. Buoy Book carries your equipment settings forward from set to set, so you're not re-entering the same details every time you hit the water. KNOW YOUR SPOTS Save your favorite lakes and ski sites, and check conditions before you head out. TOURNAMENTS Log your tournament results alongside your regular sessions, so your competition history lives in the same place as everything else. SKI WITH FRIENDS Connect with your ski buddies and follow along with each other's progress. BUILT FOR HOW YOU SKI Switch between metric and imperial units anytime. Your data, your way. Whether you're chasing a new personal best or just want a clean record of every day on the water, Buoy Book keeps it all in one place.
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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
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.
