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
Spearspots
SpearSpots is the ultimate marine data companion for spearfishers, anglers, and ocean enthusiasts
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Spearspots: map the core Sports 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
Incorporate user reviews and ratings to build trust.
Assumption to check: Lack of user reviews makes it hard to trust the app
Validate with people who use this workflow before building.
Hypothesis 2
Focus on user-generated content to increase available events.
Assumption to check: Limited event options may deter users from returning
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the event creation flow with guided inputs.
Assumption to check: Complicated event creation process can confuse users
Validate with people who use this workflow before building.
Hypothesis 4
Implement advanced searching and filtering features for better user experience.
Assumption to check: Difficulty in finding relevant events
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
SpearSpots is the ultimate marine data companion for spearfishers, anglers, and ocean enthusiasts. Get precise tide predictions, wave conditions, and water temperature data to maximize your time on the water. COMPREHENSIVE MARINE DATA • Real-time tide predictions with high/low tide indicators • Wave height, period, and direction analysis • Water temperature monitoring • Ocean current velocity and direction • Swell and wind wave conditions SMART FISHING INSIGHTS • Best fishing window predictions based on marine conditions • Severity-based condition ratings (Poor to Excellent) • Visual data grids for easy condition comparison • Multiple spot tracking (up to 10 locations) GLOBAL COVERAGE • Works worldwide with comprehensive marine data • Automatic location detection • Offline-capable data storage Perfect for: • Spearfishers planning their dives • Anglers optimizing fishing times • Surfers checking wave conditions • Marine researchers and enthusiasts • Anyone who loves the ocean
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
Supabase
TypeScript
React Navigation
Zustand
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.
