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.
Bought it at Costco
$2.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
Your first Build Kit is free with a verified email.
Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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.
JavaScript is required to complete mailbox verification.
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Cost Co-Pilot: Price Drops: map the core Shopping workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Affiliate link: CloneChart may earn a commission at no extra cost
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Bought it at Costco. Then the price dropped? Cost Co-Pilot helps you spot potential price adjustments on purchases you've already made — and find the receipt to ask at the membership desk. One purchase. No subscription, no in-app purchases, no ads. SPOT PRICE DROPS AFTER CHECKOUT Check recent warehouse purchases against available prices at the warehouse where you bought them. The app also looks for matching monthly savings booklet deals and items you bought again for less. SEE THE DIFFERENCE AND THE DEADLINE See what you paid, the potential difference and a claim-by date based on the 30-day window. Get a reminder before that date, with notifications enabled. FIND THE RECEIPT FOR THE DESK Search your warehouse receipts by item name or number. Find when you bought something, see your spending history and open the full receipt on Costco's site. YOUR RECEIPTS STAY ON YOUR IPHONE Sign in on Costco's own website inside the app. Cost Co-Pilot never reads or stores your Costco password. Your receipts stay on your device and aren't uploaded to a developer server. EXPLORE BEFORE SIGNING IN After downloading, choose "Try with sample receipts" to explore the app without connecting your Costco account. Sample amounts are examples, not promised savings. MADE FOR US COSTCO MEMBERS Works with US costco.com member accounts and in-warehouse receipts. Price coverage can be incomplete, and prices and availability vary by warehouse. A flagged difference is a potential adjustment, not an approved refund. Not every item qualifies. Costco decides eligibility; ask at the membership counter of the warehouse where you bought it. Cost Co-Pilot is an independent app and is not affiliated with, endorsed by or sponsored by Costco Wholesale Corporation.
Written user reviews are not shown here. Check current App Store reviews >
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
Assumption to check: Slow checkout process
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor search results
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No order tracking
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
Not assessed in a Build Kit yet.
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.