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
BayWatch - Alerts for eBay
Find new items first on eBay™ before anyone else
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
412 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 included16 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 BayWatch - Alerts for eBay: map the core Shopping 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
Implement reliable push notifications with user-configurable settings.
Assumption to check: Inconsistent notifications for alerts
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search filters and add saved searches feature.
Assumption to check: Limited search functionality
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the UI and improve layout for better usability.
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Clarify benefits of subscription tiers and offer a free trial.
Assumption to check: Subscription model can be confusing
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
Find new items first on eBay™ before anyone else. BayWatch monitors eBay and alerts you as new items are found. Simply create your watch, and BayWatch will alert you as new items matching your search are found on eBay. BayWatch also lets you simply browse eBay. No need to jump back and forth between eBay and BayWatch. View eBay item details, price, bids, description, pictures, and simply tap on Shop Now to head over to eBay and purchase. Watch individual eBay items that interest you, and receive alerts before the eBay listing ends, allowing you to check your bid and win. The essential app for finding rarely listed eBay items, and getting bargains at the best price. Find new eBay items first with BayWatch. When you click on links to various merchants in this app and make a purchase, this can result in this app earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network. These do not impact the price you pay.
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-navigation/native
expo-notifications
axios
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expo-linear-gradient
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.
