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
Hoopla: Your Library Anywhere
Borrow audiobooks, eBooks, movies, TV episodes, comics, and music, all in one app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
1,396,104 ratings · Top 5%
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 included14 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 Hoopla: Your Library Anywhere: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Borrow audiobooks, eBooks, movies, TV episodes, comics, and music, all in one app. No subscription. No ads. Just click borrow and press play. Hoopla works with your local public library to bring millions of titles to your phone, tablet, and TV. New titles are added every day, and many are ready to borrow the moment you find them. How it Works 1. Find your library in the Hoopla app 2. Sign in with your library card 3. Start borrowing and enjoy Audiobooks and eBooks - Bestsellers, new releases, indie authors, and classics - Romance, thrillers, fantasy, mystery, nonfiction, kids, teens, and more - Listen on your commute, at the gym, or while you wind down - Stream right away or download to enjoy later Movies and TV - Stream movies, TV shows, documentaries, and anime at home or on the go - Watch on iPhone, iPad, or Apple TV - SeasonPass lets you borrow a full season of a show and watch at your own pace - Family movies and kids' shows for your next movie night Comics, Graphic Novels, and Manga - Superheroes, manga, graphic memoirs, and kids' comics - ActionView guides you panel by panel so you can take in every detail of the art Music - Borrow full albums from today's chart-toppers and all-time favorites - Shuffle music across your borrowed albums to build your own unique playlist Made for how you read, listen, and watch - Apple CarPlay for audiobooks and music on the road - Offline downloads, so you can enjoy borrowed titles without using data - Sleep timer for bedtime listening - Dark mode for comfortable late-night reading - Kids Mode for family-friendly browsing - Titles return automatically, so there are never late fees - Hoopla BingePass gives you seven days of access to a collection of premium content with one borrow All you need is a library card from a participating public library. Don't have one yet? Check with your local library about getting a card. Hoopla is offered in thousands of libraries. Available titles, formats, and borrowing limits vary by library. Titles are licensed, not owned, and availability may change at any time due to publisher agreements.
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
Focus on partnerships with more publishers to expand content library
Assumption to check: Limited availability of titles compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Revamp the loans section for easier tracking and management
Assumption to check: Clunky loan management interface
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more robust search algorithm for better accuracy
Assumption to check: Inconsistent search results
Validate with people who use this workflow before building.
Hypothesis 4
Introduce offline reading capabilities for enhanced user experience
Assumption to check: No offline access for borrowed content
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
React Navigation
Axios
Zustand
BUILD KIT DIFFICULTY
Intermediate
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.
