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
Snorkel Fish Hawaii for iPhone
Updated July 2026
$8.99 · In-app purchases
PRICE
$8.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
21 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 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 Snorkel Fish Hawaii for iPhone: 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
Provide comprehensive fish descriptions and interactive guides.
Assumption to check: Limited fish identification information
Validate with people who use this workflow before building.
Hypothesis 2
Implement user-generated content and real-time spot updates.
Assumption to check: Infrequent updates on snorkeling spots
Validate with people who use this workflow before building.
Hypothesis 3
Offer tiered subscription plans with varying features.
Assumption to check: High subscription cost for premium features
Validate with people who use this workflow before building.
Hypothesis 4
Design a cleaner, more segmented UI for easier navigation.
Assumption to check: Cluttered UI with too much information presented at once
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. Covers all shallow-water reef fish commonly seen by snorkelers (and some rare ones too). Flip through screens like pages of a book, or find a fish quickly by color or shape. Up to 5 photos per fish—showing juveniles, males, females, color variations. Videos of each fish too. Save fish you've seen in the Log Book. Sharpen your fish ID skills with flashcard-style Quiz Mode. - For snorkelers and beginning scuba divers. - 205 species** / 600+ photos! - Identify fish by color, shape, family group, or name (common, scientific, Hawaiian). - Multiple photos of most fish. - Flashcard-style quiz. - Videos of all fish (requires internet). - Logbook: save fish, add notes, share Logbook (text only). - Links to Fishbase and Reef.org for each fish. - Works great on iPads too. ** Only half of Hawaii's 400+ shore fish live at snorkeling depths. For easier ID, faster download and smaller footprint, this app omits deeper-dwelling fish. For a more complete set of fish, see my app Scuba Fish Hawaii. Created 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, a Guide to Hawaii's Marine Invertebrates. Check them out on Amazon.
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
Zustand
Supabase
React Navigation
Shadcn/UI
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.
