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
TidesTable_SD
-TidesTable_SD provides the Best Estimates of HIGH & LOW Tide in San Diego, CA in the WORLD!
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 ratings · Top 5%
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 TidesTable_SD: map the core Travel 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
Expand location database and integrate GPS for user convenience.
Assumption to check: Limited location support may frustrate users.
Validate with people who use this workflow before building.
Hypothesis 2
Implement offline data caching for better usability.
Assumption to check: Lack of offline functionality.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce customizable notifications for tide alerts.
Assumption to check: No push notifications for tide changes.
Validate with people who use this workflow before building.
Hypothesis 4
Add user preferences for tide display settings.
Assumption to check: Minimal 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
-TidesTable_SD provides the Best Estimates of HIGH & LOW Tide in San Diego, CA in the WORLD! **2 HIGH Tides + 2 LOW Tides per Day combined with ~9 FEET of OCEAN Swell = Better Check the TIDES TABLE before Setting up your Fiesta Island Seaside Campsite!~ -TidesTable_SD is Loaded with Tidal Data.....Date / Time / Ocean Swell Height / Charted Lunar Influence on Ocean Height by Rolling Month 2025 & 2026 TIDES DATA Included!! You won't need an update until 2027!! *No signal or updates necessary for the Tidal Information Table & Graph! Prepare for your Annual Softball Tourney the Best Way. TidesTable_SD provides a Zoomable Map of Mission Bay Park & Links to City Information Use the included GPS Links to get Driving Directions & even review the Current Fireworks Schedule!! Using the Most Accurate Lunar Forecasts of HIGH & LOW Tide Available from the US Government, TidesTable_SD provides a graphical picture of the HIGH & LOW Tides for the Entire Month for San Diego, CA. Go to Fiesta Island Prepared for Maximum Enjoyment!! TidesTable_SD displays the Current Time Until Next High/Low Tide....the Relative Size of the Tide (centimeters & Feet) In San Diego, High Tide - Low Tide = Up to ~10 Feet of Water!! (~5 Feet Avg) Swipe Right to Check the Previous 2 Tides (now you can make sense of that Dark Waterline in the Sand) (blue text) Swipe Left to Check Current Impending Tides. (golden text) The Fat Blue Line reveals the Expected Water Height at Tide Tilt your Phone to Landscape to reveal a Graph of the Next 120 High & LowTides Tilt you Phone to Portrait to display a Table Listing the next 120 High & Low Tides (an Entire Month!) Use the "GPS" button to open Apple Maps for Directions Use the "SD" button to open San Diego's Fiesta Island Upcoming Event Page and City Links Tap the TritiumSoft button for a Fast Link to our other offerings on the App Store. Each Day there are approximately 2 sets of High / Low Tide. Normally One Set of Tides is Very Large, Impacting Enjoyment of the Beach on Fiesta Island. Now you can see what is going on with the Tides in San Diego! Accurate Tidal Data Any Time of Day, Any Day of the Year!! With Up-to-the-Minute Graphical and Textual Tidal Data, you can Park and Setup your Rig on the Beach like a PRO!! *works on iPhone & iPad
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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
React Native
Expo
Supabase
React Navigation
date-fns
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.
