App Overview

TBR Spinner icon

TBR Spinner

Brian Barnett · Books

Feeling overwhelmed by that ever-growing pile of books you plan to read? Do you spend more time deciding what to read than actually reading? It's time to end the decision fatigue!

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
1 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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A product spec, screen plans, and build steps for your coding agent.

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What's included16 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for TBR Spinner: 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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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 advanced sorting and filtering options for better user experience.

Assumption to check: Limited book selection management features

Validate with people who use this workflow before building.

Hypothesis 2

Add functionality for users to share their selected books on social media.

Assumption to check: No social sharing features

Validate with people who use this workflow before building.

Hypothesis 3

Incorporate user preferences to suggest books.

Assumption to check: Lack of personalization

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to access their book list and spin feature offline.

Assumption to check: No offline functionality

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Feeling overwhelmed by that ever-growing pile of books you plan to read? Do you spend more time deciding what to read than actually reading? It's time to end the decision fatigue! Welcome to TBR Spinner, the fun and simple way to choose your next book! Add your 'To Be Read' list to our beautiful, easy-to-use library, and when you're ready for a new adventure, just spin the wheel. Let fate pick your next page-turner! Key Features: Spin the Wheel: A beautifully animated spinner that makes choosing a book an exciting event. No more indecision! Build Your Digital Bookshelf: Easily add books with title, author, series, genre, and page count. Powerful Spin Filters: In the mood for a short fantasy book? Or a long novel from your favorite author? Filter the wheel by genre, author, or page count (Short, Average, Long) to match your mood. Customize Your Spin: Choose to spin from all your unread books, a random number of them, or even the books you've added most recently or longest ago. Filter out books in a series to only show the next book on the spinner, filter by author's first or last name or just the first letter with the starts with filter, make book by letter challenges easier to choose for. Seamless iCloud Sync: Your library is automatically and securely backed up to your iCloud account, keeping it in sync across all your devices. Manual Backup: Export and import from backup files should you want to share your library file with others. Stop deliberating and start reading. Download TBR Spinner and let the wheel decide!

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Screenshots

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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.

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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.