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.
Cardsy gives you a complete picture of your card strategy.
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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.
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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.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Cardsy: Credit Card Tracker: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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: Users struggle with managing multiple accounts effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Transaction categorization can be inconsistent.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Reminders may be overlooked by users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited reporting features.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Cardsy gives you a complete picture of your card strategy. Track your cards, benefits, credits, annual fees, bonus offers, and earning rates in one simple place. Whether you manage a few cards or a full rewards setup, Cardsy helps you understand what each card is worth and which one to use for every purchase. TRACK YOUR CARD BENEFITS Track all the benefits that come with your cards, from monthly dining credits to yearly free night certificates. Cardsy helps you stay focused on the perks that matter, with auto-tracking for benefits that are automatically charged and the option to hide benefits you don’t use. KNOW YOUR REAL CARD VALUE Compare the value you receive from benefits and bonuses against annual fees. View card value over time, review past benefit usage, and see which cards are adding value to your wallet and which ones may be costing more than they’re worth. FIND THE BEST CARD TO USE Use the Best Card explorer to rank your cards by earning rate for any spending category. Cardsy lets you tailor rankings to how you actually spend, whether you prefer booking direct instead of using travel portals or use Apple Pay to earn more with mobile wallet bonuses. Add custom points valuations so rankings reflect how you personally value points, miles, and cash back. MANAGE YOUR WALLET Add cards, track open dates, product changes, closed cards, and credit limits. Cardsy also gives you helpful wallet insights, such as your total credit limit and average card age. TRACK BONUSES AND OFFERS Follow sign-up bonuses, retention offers, and upgrade offers from start to finish. Track progress toward spending requirements, stay ahead of deadlines, and remember the value you’ve earned from past bonuses. EXPLORE LOUNGES AND TRACK VISITS Discover which airport lounges you can access with your cards and plan your travels accordingly. Browse lounges by airport or network, see access details for each lounge your cards unlock, and log your visits to track the value you're getting from lounge benefits and which lounges you've visited. BUILT FOR CREDIT CARD ENTHUSIASTS With Cardsy, your credit cards become easier to understand, easier to manage, and easier to optimize. Terms of Service: https://cardsyapp.com/terms Privacy Policy: https://cardsyapp.com/privacy
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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.
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.