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
Easy Fish ID Caribbean
Updated July 2026
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
13 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's included17 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 Easy Fish ID Caribbean: 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
Enhance database with user contributions and partnerships.
Assumption to check: Limited fish species database compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Provide clearer value propositions for premium features.
Assumption to check: In-app purchases can be unclear
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image loading with caching and lazy loading.
Assumption to check: Occasional performance issues with image loading
Validate with people who use this workflow before building.
Hypothesis 4
Add community features like forums or user galleries.
Assumption to check: Limited user interaction features
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
Updated July 2026. Super easy! Browse by color, shape, or name. Flip through screens like pages of a book. Boost your fish ID skills with Quiz Mode. Photos and descriptions of 280 fish commonly seen by snorkelers and divers. Turtles too. - Created for snorkelers & divers. - Find fish & turtles quickly by color, shape, family group, or name - Multiple photos: juveniles, males, females etc. - 280 species / 845 photos / informative text / accurate IDs - Sharpen your fish ID skills with interactive Quiz Mode - Logbook: Save fish you've seen, add notes, email Logbook (text only). - Works great on iPads too. Major photography by Robert F. Myers (www.seaclicks.com) & Kevin Bryant (www.flickr.com/photos/mentalblock). Text and design by John Hoover, author of Hawaii's best-selling marine life ID books: The Ultimate Guide to Hawaiian Reef Fishes, and: Hawaii's Sea Creatures. Check them out on Amazon. Note: This is a basic "Fish ID 101" type app. For complete coverage of all 600+ species, I recommend the book "Reef Fish ID" by Paul Humann and Ned DeLoach.
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 Native
Expo
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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.
