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.
Catalog your entire home library in an afternoon
Free · 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.
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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 My Book List - Library Tracker: 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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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: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Complexity in managing large libraries
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of personalized recommendations
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.
Catalog your entire home library in an afternoon. Snap a photo of any shelf and the AI adds every title. No typing, no spreadsheets, no scattered notes. Trusted by 600+ readers and rated 4.1 stars on the App Store since 2011. • Catalog a 200-book shelf in five minutes. Point your camera. AI reads the spines and adds the books. • Add a single book in seconds by scanning the barcode on the back cover. • Bring your Kindle library across in one tap. No CSV juggling. • Find anything in plain English. "That biography about the architect" works. • AI sorts your shelves by genre, mood, and theme so you stop tagging by hand. • Read on iPhone, edit on iPad, look something up offline at the bookstore. Sync handles the rest. How it works: 1. Point your camera at a shelf and let AI populate your library. 2. Sort, tag, and mark books as Read, Reading, or To Read. 3. Pick up on any device. Share with friends, join a club, ask for a recommendation when you want one. Coming from another app or a spreadsheet? Import CSV, TSV, JSON, XLSX, BibTeX, or RIS files. Field mapping is built in. Real review: "I had a bunch of books I needed to inventory and the barcode scanner made it incredibly easy. Great app." BuckeyeCityCates, App Store review, 2024 Free to start with twenty books and three barcode scans. Open the app and add your first shelf. Payment will be charged to your Apple ID at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your Account Settings on the App Store after purchase. Any unused portion of a free trial is forfeited when purchasing a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://BigBalli.com/privacy
Written user reviews are not shown here. Check current App Store reviews >
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.