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
Float LOZ
Lake of the Ozark's go-to boating map and lake guide app.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.4
5 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.
Build your own version
Build Kit
Make this idea yours
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 included18 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 Float LOZ: 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
Implement robust offline map capabilities.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search algorithm for better accuracy.
Assumption to check: Inconsistent search results
Validate with people who use this workflow before building.
Hypothesis 3
Integrate TTS for multilingual support.
Assumption to check: Lack of voice navigation in multiple languages
Validate with people who use this workflow before building.
Hypothesis 4
Offer additional value in subscriptions, like premium features.
Assumption to check: Subscription model may deter users
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
Lake of the Ozark's go-to boating map and lake guide app. Explore Lake of the Ozarks with confidence. Discover marinas, boat launches, waterfront restaurants, fuel docks, hangout spots, and more. Save your favorite places, record your time on the water, and share your adventures with friends and family. Whether you're new to the lake or out every weekend, Float LOZ helps you learn your way around and make the most of your day on the water. Favorites Save marinas, restaurants, boat launches, and other go-to spots for quick access anytime. Places Create your own custom places on the map. Mark quiet coves, surfing areas, fishing spots, sandbars, or favorite hangouts and keep them organized your way. Locate Yourself Instantly Quickly see your location on the lake and orient yourself with ease. Current Stay updated with lake news, water level, water temperature, and weather forecasts. Choose Your Map Style Switch between multiple map styles including standard, satellite, and dark mode views. Map Overlays Toggle overlays for fuel docks, boat launches, markers, and other useful lake information. Float+ Features Tracks Record your day on the water and save your path to revisit later. Live Sessions Share your live location with friends and family using a simple link or code. 3D Map Mode View the lake in perspective with terrain and depth for a more immersive experience on the water. Float LOZ is designed to help you explore and enjoy Lake of the Ozarks, not provide turn-by-turn marine navigation. Always operate responsibly and use proper marine charts and equipment when boating. Terms of Use - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
zustand
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.
