Comparison

Lexicon vs CaseBook

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Lexicon

This app helps you build and visualize your vocabulary. It creates beautiful cards for each word, including definitions, origins, pronunciation, memory aids, and relevant photographs. Discover words in real-world contexts and organize your learning.

Highlights
  • Visual word cards
  • Etymology and pronunciation
  • Memory hooks
  • Real-world word sightings
  • Customizable collections
  • Daily Word of the Day
Read full description

Lexicon is a personal vocabulary gallery for the curious mind. Every word you collect becomes a beautifully crafted card — complete with its definition, etymology, pronunciation, a memory hook to help it stick, and a striking photograph to bring it to life. HOW IT WORKS Search for any word and add it to your collection. Lexicon instantly curates a rich card with everything you need to truly absorb it: where the word came from, how to use it, a mnemonic to remember it by, and a cultural reference that gives it context. Each card is paired with a carefully selected photograph, turning your vocabulary into something worth browsing. SIGHTINGS — YOUR WORDS IN THE WILD Lexicon scans articles, essays, poetry, and quotes across the web to find real appearances of the words you've collected. It's the thrill of recognition — seeing a word you just learned show up in The Guardian, a poem, or a famous quote. A daily Word of the Day, chosen to reflect the cultural moment, keeps your collection growing. ORGANIZE YOUR WAY Create custom collections to group words by theme, project, or mood. Browse your library alphabetically, by domain (Art, Logic, Nature, Society), or by collection. Switch between a visual gallery and a clean index view. BUILT TO REMEMBER Every card includes a mnemonic device — a short, catchy phrase designed to make the word unforgettable. Combined with etymology, example sentences, and pop culture references, Lexicon gives you multiple pathways to retention. DESIGNED WITH CARE Lexicon is built for people who believe words matter. The interface is minimal, typographic, and intentional — inspired by editorial design and the quiet pleasure of a well-curated library. Your words sync across devices with Sign in with Apple. Your collection is yours, wherever you go.

About

CaseBook

Features
Read full description

The business education you actually use — in five minutes a day. CaseBook teaches the core of an MBA through hundreds of real business case studies, then an AI coach makes every lesson personal to your company. Not a course. Not a book summary. You read the story, name the move, and apply it to your own business — Monday. HOW ONE SESSION WORKS (about 5 minutes) • Hook — a 30-second real-story setup ("In 2011, a decision nearly killed Netflix…") • Case — the situation, the decision, the outcome, across a few skimmable screens • The Crux — the lesson, named plainly and turned into a framework you can use • Apply — a quick concept check, then a reflection about YOUR company, with AI coaching on your answer MEET YOUR AI COACH An MBA professor in your pocket who actually reads your homework. After each case, the coach: • Personalizes the question to your real company, model, and stage • Reads your answer and responds like a sharp operator — not a chatbot saying something nice • Surfaces your blind spot and the second-order cost you missed • Gives one concrete next step to take this week As your saved moves add up, it writes a living strategy note: the throughline in your decisions and the single highest-leverage thing to focus on next. HUNDREDS OF CASES ACROSS 12 DOMAINS Strategy & Competitive Advantage · Marketing & Growth · Finance & Unit Economics · Operations & Scaling · Leadership & Org Design · Product & Innovation · Negotiation & Deals · Decision-Making & Behavioral · AI in Business · Business Models · Great Entrepreneurs · Design & UX. New cases and series added continuously. The real decisions behind the companies you know — Netflix, Nvidia, Costco, Stripe, and hundreds more — turned into moves you can use. BUILT FOR FOUNDERS, OPERATORS, AND ANYONE WHO LEADS Starting a company, running a team, moving into a business role, or just want to think more sharply about strategy, pricing, hiring, and growth — CaseBook builds the judgment a real MBA is supposed to. • Listen to any case with built-in narration, hands-free • Keep a Playbook of your best moves that compounds over time • Build a daily streak — five minutes is enough PRICING Start free. CaseBook Pro unlocks the full library and unlimited AI coaching, with a 7-day free trial, then $5.99/month or $49.99/year. Learn the move. Apply it Monday. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://casebookmba.app/privacy/

Screenshots

Lexicon4 screens
CaseBook4 screens

Verdict

The call

The clearest difference is in-app purchases: Lexicon at none against CaseBook's 2. On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CaseBook sells 2 in-app purchases, starting at $5.99 per month. Lexicon asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Lexicon versus CaseBook: the parameters behind the verdict, then further details
ParameterLexiconCaseBook
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 10 days—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS18.617.0 — better
Further details — not scored
Size10 MB4 MB
Age rating4+12+
DeveloperNg Zhong WeiChris Beaver66260473

In-app purchases

None

Lexicon

No in-app purchases

2 purchases

CaseBook

Subscriptions2
  • CaseBook Pro (Monthly)7 Days trial$5.991 Month
  • CaseBook Pro (Annual)$49.991 Year

Questions

Is Lexicon free?
Lexicon is free to download, with no in-app purchases.
Is CaseBook free?
CaseBook is free to download, with in-app purchases available.
Do Lexicon or CaseBook have ads?
Neither Lexicon nor CaseBook shows ads.

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