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
FishTrack - Charts & Forecasts
FishTrack provides saltwater anglers with everything they need to find fish
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
6,270 ratings · Top 15%
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 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 FishTrack - Charts & Forecasts: 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
FishTrack provides saltwater anglers with everything they need to find fish. The FishTrack app offers Cloud-free Sea Surface Temperature (SST) charts, high-definition global satellite imagery, including water temperature charts, water color, currents, tides, moon phase and marine weather forecasts – all in one layered tool. Users can mark ‘hot spots’ and record GPS locations of temperature breaks and color barriers. Save imagery and overlay data for offline use to identify bite zones while navigating offshore. With FishTrack you can: -View the Latest SST and Chlorophyll imagery -Mark, name and save data of potential hot spots -Save fishing chart imagery for offline use -Plot waypoints and calculate distances -Overlay bathymetry, ocean currents and sea surface height -View marine weather forecasts -View your current location while offline Don't fish blind. Save time and fuel with the FishTrack app. Download now to get started! We want to hear from you! Submit your questions or comments through our app to let us know what you think. If you'd like to speak directly with our customer service team, please e-mail us at: [email protected]. — FishTrack Premium purchase small print — • Subscription services/benefits (described above) are rendered for 1 month or 1 year period depending on product selection • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable • Full terms and conditions can be found here https://www.fishtrack.com/terms-of-use http://www.fishtrack.com/privacy-policy/
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 offline caching for weather data.
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer information about benefits of subscriptions.
Assumption to check: In-app purchases can be unclear
Validate with people who use this workflow before building.
Hypothesis 3
Optimize map loading with better data management.
Assumption to check: Occasional map loading issues
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI for basic users while providing advanced features for enthusiasts.
Assumption to check: Overwhelming data for casual users
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.
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BUILD KIT DIFFICULTY
Advanced
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.
