App Overview

Era Year Lookup Offline2026 icon

Era Year Lookup Offline2026

Nanjing Yunxiaochuang Technology Co., Ltd · Books

Era Year Lookup is an offline reference tool for reading classical texts, taking history notes, and organizing research

$0.29

PRICE
$0.29
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

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 included

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 Era Year Lookup Offline2026: 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 a more advanced search feature with filters.

Assumption to check: Users often find difficulty in finding specific years quickly.

Validate with people who use this workflow before building.

Hypothesis 2

Enhance the app to preload more data for offline use.

Assumption to check: Limited offline capabilities for detailed information.

Validate with people who use this workflow before building.

Hypothesis 3

Introduce sharing options for interesting years or eras.

Assumption to check: Lack of user engagement features like sharing.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to categorize their favorites for better organization.

Assumption to check: No user customization options for favorite years.

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

Era Year Lookup is an offline reference tool for reading classical texts, taking history notes, and organizing research. It helps you quickly understand era names, sexagenary cycle years, dynasties, rulers, and Common Era dates mentioned in books. Key features: 1. Era name and CE lookup: Search by era name, ruler, dynasty, or CE year to find the corresponding year range. 2. Sexagenary year conversion: Convert between CE years and traditional cycle years to reduce manual table checking. 3. Dynasty timeline: Browse rulers, era names, and start and end years by dynasty for quick verification while reading. 4. Reading note cards: Save lookup results as local notes with book title, page number, and comments. 5. Ambiguous year reminders: Get prompts for era changes, overlapping years, and duplicate era names to reduce mistakes. 6. Local bookmarks and search: Save frequently used entries and keep all data offline. No login, no internet connection, and no personal data collection are required. It is designed for students, history readers, classical text enthusiasts, and writers organizing source material.

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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

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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
SQLite
React Navigation
BUILD KIT DIFFICULTY

Not assessed in a Build Kit yet.

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.