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
Nautide: Tides, Wind, Waves +
All the information you need to know to plan activities at sea in a simple and practical app.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
3,396 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/
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 Nautide: Tides, Wind, Waves +: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
All the information you need to know to plan activities at sea in a simple and practical app. More than 25,000 coastal stations around the world. TIDES Daily tide charts and tidal coefficient. High tides and low tides. Tides height. Monthly tide table. Tides for fishing. SURF Height and direction of the swell, wave period, hourly surf table. FISH ACTIVITY Hourly activity chart and solunar periods with the best fishing moments of every day. Monthly activity table with daily fish activity and major and minor fishing periods. SUN AND MOON Sunrise, sunset, moonrise, moonset, azimut, moon phases, eclipses, transits and other astronomical data. BAROMETER Fishing barometer, pressure graph and hourly pressure table with trend indicator. WIND Wind at land and wind at sea: wind speed, wind gust, wind force, land and sea conditions and hourly wind table. WEATHER Weather conditions at coast: Cloud cover, visibility, temperature, precipitation, wind chill, humidity, dew point and hourly weather table. MARINE Open water forecast for marine/sailing. Includes all weather indicators and also the water temp. Hourly marine table. AIR QUALITY Major air pollutants, particulate matter, hour-by-hour forecast. ----------------- Free download with restrictions. Requires suscription to activate all the sections and remove the ads. Terms of use: https://nautide.com/usage-terms © tides4fishing official app
Written user reviews are not shown here. Check current App Store reviews >
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 caching for last known weather data.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize notification settings.
Assumption to check: Notifications can be intrusive
Validate with people who use this workflow before building.
Hypothesis 3
Add a search feature for locations.
Assumption to check: Difficult to find specific locations
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear explanations of premium features before paywall.
Assumption to check: In-app purchase confusion
Validate with people who use this workflow before building.
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
Axios
React Navigation
Redux
@react-native-community/push-notification-ios
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.
