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
Fishing Barometer - Fishermen
When you go fishing, it is very important to know how to recognize the optimal weather conditions so that our fishing is fruitful.
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
92 ratings · Top 30%
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 included17 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 Fishing Barometer - Fishermen: 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
Provide more granular weather data and forecasts.
Assumption to check: Limited detailed weather data for specific fishing locations.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate community features for sharing tips and locations.
Assumption to check: Lack of user community features or social sharing.
Validate with people who use this workflow before building.
Hypothesis 3
Ensure real-time updates and notifications for pressure changes.
Assumption to check: Inconsistent updates on barometer data.
Validate with people who use this workflow before building.
Hypothesis 4
Offer a freemium model with basic features available for free.
Assumption to check: High price point for in-app purchases.
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
When you go fishing, it is very important to know how to recognize the optimal weather conditions so that our fishing is fruitful. Temperature, atmospheric pressure, moon phases and wind are all factors that should not be underestimated. Wherever you are this app gives you the local atmospheric pressure indicating the condition of the fishing trip. Make sure you have turned on your device's location services and that you are connected to the Internet. At this point the app will detect your geographical position. The display will show the location name, current air pressure, fishing trip status and weather conditions. You have the option to choose the barometer inside your device (if present) or to use the weather service to detect the atmospheric pressure. [ Main features ] - Real-time atmospheric pressure measurement - Condition of the fishing trip: excellent, good, poor - Main needle (current pressure) and reference needle (previous pressure) - Support for the device's internal barometer - Ability to select the device's internal barometer or weather station barometer - Supported units of measurement in mBar, inHg, mmHg, hPa, kPa, torr - Ability to track the latest barometric pressure reading - Location detection - Weather conditions detection - Search City - Save favorite places (unlimited) - General information on reading and interpreting data [ Barometer type ] You can choose to use your device's internal barometer or the barometer with data from the weather station closest to you [ Unit of measure ] You can easily choose to see the atmospheric pressure measured in mBar, inHg, mmHg, hPa, kPa, torr [ Support ] If you like the App, leave a review on the App Store. For suggestions contact us at [email protected], or visit www.lionsapp.com
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.
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BUILD KIT DIFFICULTY
Starter
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.
