App Overview

El Cefer icon

El Cefer

Cepher Publishing LLC · Books

La palabra hebrea (את) significa divino, y la palabra hebrea cefer (ספר) significa libro, pergamino, letra o escritura

$21.99 · In-app purchases

PRICE
$21.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.8
4 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 included17 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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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 El Cefer: 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

Focus on exclusive content or partnerships with authors.

Assumption to check: Limited book selection compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Offer flexible subscription tiers or one-time purchases.

Assumption to check: High subscription costs for users

Validate with people who use this workflow before building.

Hypothesis 3

Simplify navigation and highlight key features.

Assumption to check: User interface can be overwhelming

Validate with people who use this workflow before building.

Hypothesis 4

Integrate social sharing options for readers and reviews.

Assumption to check: Lack of 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

La palabra hebrea (את) significa divino, y la palabra hebrea cefer (ספר) significa libro, pergamino, letra o escritura. Por lo tanto, el את CEFER es el "Libro Divino". ¡Esta colección completa de Escrituras Sagradas restaura mucho de lo que se ha eliminado y/o interpretado incorrectamente en la Biblia durante siglos! Establece una traducción, en lugar de una sustitución de los nombres del Padre, del Hijo y del Espíritu Santo. • Translitera más de 3,100 otros nombres y lugares hebreos, sin sustitución. • Omitido en otras traducciones, el את ha sido restaurado más de 10,000 veces. • Incluye los 74 libros previamente canonizados, más otros 13 libros considerados inspirados y/o de importancia histórica como Janok (Enoj) y Yovheliym (Jubileos) de los Rollos del Mar Muerto, así como Yashar (Jasher), 2- 4 Esdras (Esdras), 1-2 Baruk y 1-4 Makkabiym (Macabeos) - todos publicados en el orden cronológico en que fueron escritos. • Corrige los errores (por primera vez) en Shiyr HaShiriym (Cantar de los Cantares), Yeshayahu (Isaías) 14, Zakaryahu (Zacarías) 5, Mattithyahu (Mateo) 23, y corrige varios otros errores notorios encontrados casi en todas las traducciones anteriores al español. • Restaura el capítulo 29 de los Hechos de los Apóstoles que narra el viaje de Pablo a España. La aplicación Cefer le permite buscar fácilmente las escrituras por palabra clave, libro, capítulo o versículo y está equipada con características adicionales, que incluyen: • Capacidad para tomar notas con clasificación. • Resaltado disponible en siete colores diferentes. • Un léxico de todas las palabras hebreas transliteradas que se encuentran en את CEFER. • La Oración Hebrea Diaria. • Enlaces a nuestra porción semanal de la Toráh, al blog del Dr. Stephen Pidgeon y también a artículos y a otras descargas gratuitas disponibles en nuestro sitio web. El costo único cubre todas las actualizaciones y/o revisiones futuras del texto.

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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.

SUGGESTED BUILD STACK
React Native
Expo
Zustand
react-navigation
axios
react-native-paper
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.