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
Cliff Check
Cliff Check – Know When It’s Beach Time!
$4.99 · In-app purchases
PRICE
$4.99
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 included15 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 Cliff Check: 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
Integrate automatic location detection using GPS.
Assumption to check: Limited location accuracy due to reliance on user input.
Validate with people who use this workflow before building.
Hypothesis 2
Implement push notifications for severe weather warnings.
Assumption to check: Lack of severe weather alerts.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to set favorite locations and customize alerts.
Assumption to check: No user customization options.
Validate with people who use this workflow before building.
Hypothesis 4
Provide cached data for the last known weather conditions.
Assumption to check: No offline access to weather conditions.
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
Cliff Check – Know When It’s Beach Time! Whether you’re planning a family picnic, a solo surf, or a dog walk along the coast, Cliff Check helps you know exactly when your favorite beach is walkable—or underwater. Real-Time Tide Insights Cliff Check fetches accurate, live tide data for key Sunset Cliffs beach spots like New Break, Bermuda Beach, and Kellogg Beach—so you always know when it’s beachable. Simple Visuals, Smart Alerts A big check mark means go. An X means the tide’s too high. That’s it. You’ll also get intuitive messages like “Good all day” or “Returns in 1h 42m” so you can plan accordingly. Time to Sunset + Tide Forecasting See when the sun sets and how long your beach will stay accessible before the tide changes. Plan smarter outings and soak in every last ray. Set-and-Forget Notifications Get optional alerts when your go-to beach becomes beachable—perfect for sunset lovers, dog walkers, and tide pool explorers. Beautiful, Minimal Design Inspired by Sunset Cliffs itself, the app features a clean, calming aesthetic with soft waves and subtle motion. It feels like a deep breath of ocean air.
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
Zustand
axios
react-navigation
expo-location
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.
