App Overview

Black’s Law Dictionary 10th Ed icon

Black’s Law Dictionary 10th Ed

Thomson Reuters · Reference

For more than a century, Black’s Law Dictionary® has been the gold standard for the language of law

$54.99 · In-app purchases

PRICE
$54.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
2.8
23 ratings · Below Average

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 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 Black’s Law Dictionary 10th Ed: map the core Reference 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

Provide regular updates and a community-driven definition feature.

Assumption to check: Limited content updates and definitions

Validate with people who use this workflow before building.

Hypothesis 2

Implement a more modern and intuitive UI design.

Assumption to check: User interface is not user-friendly

Validate with people who use this workflow before building.

Hypothesis 3

Optimize search algorithms and provide search suggestions.

Assumption to check: Slow search functionality

Validate with people who use this workflow before building.

Hypothesis 4

Introduce a freemium model with more accessible pricing options.

Assumption to check: High price point with limited 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

For more than a century, Black’s Law Dictionary® has been the gold standard for the language of law. Today, it’s the most widely cited law book in the world. By Editor in Chief Bryan A. Garner, the 10th Edition is the most comprehensive law dictionary ever published. It contains more than 50,000 terms, including more than 16,000 new definitions. Features • More than 50,000 terms, including 7,500 more terms than the 9th Edition • More than twice as many sources quoted and cited than the 9th Edition • Earliest usage dates in English-language contexts provided for nearly all terms – the only legal dictionary with this feature • More than 1,000 definitions of law-related abbreviations and acronyms • Trusted authority – every term has been reviewed for accuracy by nearly 300 attorneys from across the country • Pronunciation guidance, including audio pronunciations for over 7,000 terms • Thoroughly reviewed and edited Latin maxims, with 900 new maxims added New in the 10th Edition • “Did You Mean” search functionality o spell checker functionality provides alternative suggestions for misspelled search terms • Define in Black’s o define words within definition text by selecting a word and tapping Define in Black’s • Enhanced linking o link to subentries and cross-references from a search result, within a definition, and between definitions o link to Westlaw® content via the WestlawNext® iPad® app • Word of the Day o audio pronunciation available on all Word of the Day entries o link to full definition from Word of the Day tab o history slider on Word of the Day tab provides quick navigation to previous Word of the Day entries • History o track viewed definitions and sort by date or alphabetical order • Intuitive structure, formatted for easy reading and navigation

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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
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.