App Overview

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JSG Guide

Justin Ellis · Navigation

John's Sporting Goods Fishing turns 40+ years of John Martinis's PNW fishing knowledge into a tool you keep on the boat.

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.0
3 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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A product spec, screen plans, and build steps for your coding agent.

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What's included19 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.

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.

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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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 maps and attractions access.

Assumption to check: Limited offline functionality

Validate with people who use this workflow before building.

Hypothesis 2

Clarify subscription benefits and simplify the purchasing flow.

Assumption to check: In-app purchase confusion

Validate with people who use this workflow before building.

Hypothesis 3

Optimize image loading and caching.

Assumption to check: Slow loading times for images

Validate with people who use this workflow before building.

Hypothesis 4

Add more search filters (distance, category, ratings).

Assumption to check: Limited search filters

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

John's Sporting Goods Fishing turns 40+ years of John Martinis's PNW fishing knowledge into a tool you keep on the boat. WHAT'S IN IT • John's curated fishing spots — chinook, coho, pink salmon, halibut, lingcod, crab, shrimp — with the exact rigs, depths, and tide windows that worked for John. • Bathymetric depth contours overlaid on the map — see the shelves, holes, and channels you're fishing. • Live conditions for any spot — wave height, NWS marine outlook, hourly weather, NOAA tides + Hi/Lo events, NOAA current predictions with Flood/Ebb timing. • An AI fishing guide that pulls live conditions, your saved spots, and John's PDFs into every answer. Ask "where should I crab in Area 9 this week?" or "best rig for winter chinook off Possession?". • Drop and save your own spots with catches, bait, photos, and notes — every trip logged builds your personal map. • Track routes with GPS while you fish; the line stays continuous when you switch tabs. • Download John's PDF charts to your phone for use offline at the boat ramp. • Trip Planner — pick a date, location, and target species; get a plan with tide windows, gear, and waypoints. OFFLINE FIRST • Drop pins, log catches, and track routes with zero signal. • Depth contours pre-cache aggressively at app launch around your last fishing area. • Trips you log offline sync to your account the moment you reconnect. WHO IT'S FOR PNW anglers — Puget Sound, San Juans, Strait of Juan de Fuca, North Sound. Both saltwater and freshwater spots are covered. PRIVACY We don't sell data. Location is used only when you ask for conditions or save a spot. Full policy: https://api.sportinggoodsfishing.com/privacy LEARN MORE App info, sample screenshots, and what's coming next: https://jsg-app.sportinggoodsfishing.com ABOUT JOHN'S John's Sporting Goods has been Everett's fishing store since 1968. 1913 Broadway, Everett WA 98201 — (425) 259-3056.

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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
React Navigation
Axios
expo-location
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.