App Overview

BookFunnel icon

BookFunnel

BookFunnel · Books

MANAGE YOUR BOOKS

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
3.7
417 ratings · Top 50%

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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Combine features and design from your favorite apps.

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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 BookFunnel: 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

Enhance content sourcing to offer a larger variety.

Assumption to check: Limited book selection compared to competitors.

Validate with people who use this workflow before building.

Hypothesis 2

Simplify navigation and improve layout.

Assumption to check: User interface can be cluttered.

Validate with people who use this workflow before building.

Hypothesis 3

Streamline subscription management and clarity.

Assumption to check: In-app purchase process can be confusing.

Validate with people who use this workflow before building.

Hypothesis 4

Implement robust offline downloads for better accessibility.

Assumption to check: Limited offline reading options.

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

MANAGE YOUR BOOKS Your BookFunnel library is at your fingertips! Search and sort through all of your BookFunnel books and send them right to your favorite reading app. Or, save time and space, and read right in our all new reader! HOW DOES IT WORK Most books you receive from a BookFunnel author are added to your library automatically. Or, you can enter the book’s download code into the app and add it manually. Tapping any book cover in the app will open it instantly You can also get instructions on downloading the book to a different device entirely. READ COMFORTABLY Read in our app or cloud reader and customize the settings for your comfort. Choose your ideal font type and text size, line spacing, and margins. Tap any book cover in your library to open it in our reader and get started. START LISTENING NOW Our brand-new audiobook player has the features you expect— bookmarks, download quality, and a beautiful, easy-to-navigate player. The BookFunnel app also gives you the ability to fine-tune the settings you really care about, including playback speed, custom skip-back and skip-forward buttons, and a sleep timer. READ WHERE YOU LIKE Sync your books across devices and never lose your place. When you’re reading a book in our app, BookFunnel will automatically mark your last page read and zing you back to it the next time you open the book, so switch freely between your phone and tablet and back again.

Written user reviews are not shown here. Check current App Store reviews >

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.

SUGGESTED BUILD STACK
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Axios
zustand
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.