App Overview

Heaven and Hell (Allan Kardec) icon

Heaven and Hell (Allan Kardec)

F&E System Apps · Books

Heaven and Hell (Le Ciel et l'Enfer in the original French) is a book published in 1865 by Allan Kardec, the fourth tome of the fundamental works of Spiritism

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
2 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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What's included15 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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Heaven and Hell (Allan Kardec): 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

Add more books and resources to attract a wider audience.

Assumption to check: Limited content variety for users

Validate with people who use this workflow before building.

Hypothesis 2

Implement offline mode to enhance user experience.

Assumption to check: No offline reading mode

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize font styles and themes.

Assumption to check: Lack of customization options

Validate with people who use this workflow before building.

Hypothesis 4

Incorporate features for sharing quotes and discussing content.

Assumption to check: Minimal social features

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

Heaven and Hell (Le Ciel et l'Enfer in the original French) is a book published in 1865 by Allan Kardec, the fourth tome of the fundamental works of Spiritism. Its name was intentionally taken from a previous book by Swedenborg, it was also subtitled "Divine Justice According to Spiritism". It is divided into two parts named "The Doctrine" and "The Examples". The first part explains the different view Spiritism has on the subject, stating that both "Heaven" (happiness in the after-life) and "Hell" (punishment in the after-life) are misconcepts, that the state of the spirits after their death is not definitive and that there is always hope, even for the crudest criminal. This is also where Kardec explains in detail why and how "good people" are doomed to suffer and why one should not take one's own life. The second part is a series of interview with spirits of deceased people, thus exemplifying the working truth of the doctrine previously detailed. Most of the examples cited are of people now long forgotten and have become quite useless. The books is most cherished, however, for the profound morality expressed in the first part. Heaven and Hell is the second most popular book among the Fundamental Works of Spiritism. This application is considered not only a book but an environmental study of Spiritualism. Application roles: - Use the microphone to record notes about the studies; - Send email with the chapters; - Add chapters to your favorites; - Adds text notes; - Add audio notes; - Search by keywords; - Controls the font size; - Nice interface; - Easy to use and locate chapters; - No internet;

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Screenshots

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Build scope

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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
Zustand
React Native Gesture Handler
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.