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
Tide Times
Tide Times offers a simple and accurate 7-day forecast for UK tidal time
$0.99
PRICE
$0.99
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 included16 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 Tide Times: 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
Include more locations and user-generated location submissions.
Assumption to check: Limited location coverage
Validate with people who use this workflow before building.
Hypothesis 2
Implement real-time tide updates and alerts.
Assumption to check: Lack of real-time updates
Validate with people who use this workflow before building.
Hypothesis 3
Add offline access for saved locations.
Assumption to check: No offline capability
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize notifications and display settings.
Assumption to check: No user customization options
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
Tide Times offers a simple and accurate 7-day forecast for UK tidal time. It is designed to be simple yet comprehensive, with hundreds of locations on the UK coastline. Whether you are surfing, kayaking, boating, fishing, or simply visiting the beach, remember to stay safe by checking the water conditions with Tide Times. Now with Apple Watch support - get a quick view of today's tide times for each of your saved locations. Features: - Hundreds of locations around the UK coastline, covering all regions including England, Wales, Scotland, Northern Ireland, Guernsey, Jersey, Isle of Wight and more! - 7 day forecast with clear visual plot of tidal pattern. - Current tide height is shown on the visual plot by green marker. - Support for Online and Offline use - Store all your favourite locations for quick review by swiping across - Simple and intuitive design that shows you the important information quickly - Universal App designed for both iPhone and iPad Please note that a network connection is required to retrieve new data (data can then be viewed in offline mode if there is no signal at the beach!) Thank you very much for downloading Tide Times, it is greatly appreciated and I hope you find the app useful. Please remember to check out my other apps that may also be useful.
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 Navigation
Axios
Victory Native
React Native Paper
Expo
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.
