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
MAC.BID
Transform how you shop with MAC.BID – the auction app revolutionizing retail savings! Score unbeatable deals on brand-name merchandise from Amazon, Target, Walmart, and top retailers at up to 80% off retail prices
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
27,139 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/
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 MAC.BID: 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
Enhance product detail pages with more images and descriptions.
Assumption to check: Limited product information and images
Validate with people who use this workflow before building.
Hypothesis 2
Optimize loading performance with lazy loading images.
Assumption to check: Slow loading times during high traffic
Validate with people who use this workflow before building.
Hypothesis 3
Implement a feature for users to leave feedback and reviews easily.
Assumption to check: Lack of user feedback mechanisms
Validate with people who use this workflow before building.
Hypothesis 4
Create a more guided bidding process with tips and notifications.
Assumption to check: Inconsistent bidding experience
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
Transform how you shop with MAC.BID – the auction app revolutionizing retail savings! Score unbeatable deals on brand-name merchandise from Amazon, Target, Walmart, and top retailers at up to 80% off retail prices. Every auction starts at just $1 with no reserve – making incredible bargains accessible to everyone. Shoppers saved over $1 billion off retail last year. Why thousands choose MAC.BID daily: Instant Win & Smart Bidding – Skip the wait with Instant Win options or enjoy real-time bidding excitement. Set max bids and let our system bid for you automatically. Massive Daily Savings – Browse 40,000+ auctions daily across electronics, home goods, furniture, tools, fashion, toys, and more. New deals added constantly! Never Miss Deals – Smart notifications for Last Chance Deals, Dollar Deals, new listings, and items you're watching. Stay ahead of the competition. Seamless Mobile Experience – Swipe to bid, track all activity, watch live auctions, and manage favorites from anywhere. Bidding made effortless. Pickup Locations Across the Country – Collect wins at 30+ convenient warehouse locations. No shipping fees, inspect before bidding, friendly staff assistance. Exclusive Money-Saving Features: Last Chance Deals – Grab unsold items for $2.99 flat rate (9 PM - 9 AM only) Turbo Clock Auctions – Watch prices drop in real-time, freeze anytime to buy MAC Bucks Rewards – Earn virtual currency for reviews and special events Buyers Club – Premium perks including early access and free returns Perfect for bargain hunters, resellers, families, and anyone who loves great deals! From everyday essentials to unique finds, MAC.BID gives returned and overstocked products a second chance while putting money back in your pocket. Categories include: Electronics, Home & Kitchen, Furniture, Tools & Hardware, Fashion & Accessories, Toys & Games, Sports & Outdoors, Pet Supplies, Baby & Toddler, and more. Download now and join the smart shopping revolution. Bid. Win. Save big with MAC.BID!
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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
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react-query
@supabase/supabase-js
BUILD KIT DIFFICULTY
Expert
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.
