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
CheckCheck App
Authenticate designer handbags, luxury watches, sneakers, and more with CheckCheck.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
7,248 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
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 included18 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.
JavaScript is required to complete mailbox verification.
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 CheckCheck App: 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.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
< Scroll to see more >
App Store description
Authenticate designer handbags, luxury watches, sneakers, and more with CheckCheck. Buying a pre-owned designer bag? Selling a designer fashion watch or a pair of sneakers? CheckCheck tells you if it's real. Upload photos of your item, and our team of expert authenticators reviews every detail and sends you a clear result, fast. Every check comes with a Certificate of Authenticity in your name, so you can buy with confidence and sell with proof. WHAT WE AUTHENTICATE - Designer handbags, wallets, apparel, and small leather goods - Designer watches - Luxury jewelry and accessories - Sneakers - Eyewear - Streetwear and apparel WHY CHECKCHECK - An Official authentication Partner for TikTok Shop - Real human experts review every item, not just an algorithm - Results in as little as 5 minutes - Certificate of Authenticity with every completed check - Featured in Hypebeast, Sneaker Freaker, GQ, and Yahoo HOW IT WORKS 1. Choose your item category and brand 2. Take photos following our simple guide 3. Our authenticators review your photos 4. Get your result and your Certificate of Authenticity WHO USES CHECKCHECK - Shoppers buying pre-owned luxury from resale sites, marketplaces, and social media - Resellers and consignment stores who need trusted proof of authenticity - Collectors checking an item before they buy or sell - Businesses that need authentication at scale (see our Business plans at www.getcheckcheck.com) Don't risk your money on a fake. Download CheckCheck and know it's real before you buy. Questions? Visit www.getcheckcheck.com Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Written user reviews are not shown here. Check current App Store reviews >
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 a feature to create and switch between multiple lists seamlessly.
Assumption to check: Users find it difficult to manage multiple lists.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance categorization with customizable tags.
Assumption to check: Limited item categorization options.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce shared lists for collaborative shopping.
Assumption to check: No option for shared lists among users.
Validate with people who use this workflow before building.
Hypothesis 4
Add push notifications for purchase reminders and special deals.
Assumption to check: Inadequate notifications for item reminders.
Validate with people who use this workflow before building.
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
Zustand
React Navigation
react-native-gesture-handler
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.
